Стерео измеритель уровня звука на Arduino и светодиодных кольцах: схема и программа

В данной статье мы рассмотрим создание стерео измерителя уровня звука (stereo VU meter) на основе платы Arduino и светодиодных лентах (кольцах) от компании NeoPixel.

Необходимые компоненты

Плата Arduino Nano (купить на AliExpress).
Adafruit NeoPixel Ring: WS2812 5050 RGB LED (кольцо из светодиодов) – 2 шт. (купить на AliExpress).
Потенциометр – 2 шт. (купить на AliExpress).
Кнопка.
Резисторы 10 кОм и 470 Ом (купить на AliExpress).
Конденсатор 1 мкФ 6,3 В (купить на AliExpress).
Макетная плата.
Соединительные провода.

Основная идея проекта

В интернете можно найти достаточно много различных проектов измерителей уровня звука (в том числе и на нашем сайте рассматривался подобный проект), но приведенный здесь проект измерителя уровня является одним из самых "красивых" и наглядных, в связи с чем он стал одним из самых популярных в этой тематике – в связи с этим я и решил перевести его на наш сайт. Статья является переводом проекта, размещенного в сборнике проектов официального сайта Arduino, ссылка на ее первоисточник приведена в самом конце данной статьи. Автор проекта данного измерителя звука сделал за прошедшие несколько лет несколько модификаций своего творения, в этой статье я приведу схемы и коды программ только для двух самых популярных модификаций данного проекта, с большим количеством модификаций (к каждой приведено видео) вы можете ознакомиться в первоисточнике статьи.

Схема проекта

Схема стерео измерителя уровня звука на Arduino и светодиодных лентах от 05.11.2017 представлена на следующем рисунке.

Схема стерео измерителя уровня звука на Arduino и светодиодных лентах от 02.02.2018 представлена на следующем рисунке.

Внешний вид собранной конструкции измерителя уровня звука (вид спереди и сзади) показан на следующих рисунках.

Объяснение работы стерео измерителя уровня звука

Принцип работы проекта наглядно показан на следующем видео.

Автор данного проекта сначала тестировал работу измерителя уровня звука с помощью ЖК дисплея, потом с помощью 2-х светодиодных матриц, затем с помощью светодиодной ленты и только после этого он пришел к идее использования двух светодиодных колец, которые сделали его проект максимально выделяющимся и наглядным на фоне других проектов измерителей уровня звука, которые можно найти в сети. Также автор тестировал свой проект как с микрофоном, так и и без него - все это вы можете подробно посмотреть на официальной странице данного проекта (ссылка на нее внизу статьи).

Автор начинал этот проект с простого скетча для Arduino, который использовал один канал и пару светодиодов. Постепенно он добавил в проект следующие дополнительные возможности:

поддержку стерео;
переключаемая функция хранения максимумов с опцией "падения вниз" ('falling down');
настраиваемая чувствительность;
настраиваемая яркость свечения светодиодов;
можно использовать одну светодиодную ленту для отображения левого и правого каналов или два светодиодных кольца (по одному на каждый канал);
функция медленного "падения вниз" ('falling down') светодиодов;
переменные, которые можно использовать для поддержки любого числа светодиодов и другой возможной кастомизации измерителя уровня звука.

Для работы кода программы вам потребуется библиотека Adafruit_NeoPixel, которую можно скачать по следующей ссылке.

Добавление микрофона вместо линейного ввода

Автор проекта также тестировал свой измеритель уровня звука с модулем микрофона вместо линейного ввода. Схема соединений аналогична использованию линейного ввода: выход микрофона подключается к аналоговому контакту A0 платы Arduino (также необходимо подключить контакты VCC и ground микрофона).

В скетч при подключении модуля микрофона не нужно вносить никаких изменений, хотя могут потребоваться небольшие изменения в настройках чувствительности. Более подробно работа данного варианта проекта показана в следующем видео:

Исходный код программы (скетча)

Скетч для версии проекта 05.11.2017

/*
**********************************************************************
* Stereo VU Meter for 1 or 2 LED rings or strips build by ericBcreator
* Designed to be used with an Arduino UNO, Nano or compatible device.
**********************************************************************
* Last updated 20171105 by ericBcreator
*
* This code is free for personal use, not for commercial purposes.
* Please leave this header intact.
*
* contact: ericBcreator@gmail.com
**********************************************************************
*/

//#define DEBUG                                             // for debugging

//
// include the NeoPixel library:
//

#include <Adafruit_NeoPixel.h>

//
// uncomment the definition for the connected strip or ring(s)
//

//#define led_ring_60
//#define led_strip_60
//#define led_strip_30
#define led_2_rings_24
//#define led_2_rings_30
//#define led_strip_200
//#define led_strip_144

//
// important setting: using potentiometer sensor values or not
// This setting has to be set right or the script will not work correctly:
// - set this to true if using potentiometers
// - set this to false if not using potentiometers
//

const int useSensorValues = true;                         

//
// setup pins
//

int leftPin = A0, rightPin = A1;                          // left audio in on analog 0, right on analog 1
int brightnessPin = A4, sensitivityPin = A5;              // potentiometers for brightness and sensitivity on analog 4 and 5
int stripPin = 6;                                         // DIN of leds on digital pin 6
int showPeaksPin = 7;                                     // switch to toggle peaks on or off on digital pin 7
int momentarySwitch = false;                              // set false for an on/off toggle switch

//
// setup variables for the number of leds and led strip or 2 rings
//

#if defined (led_ring_60)
  //settings for a 60 led ring

  int stripNumOfLeds = 60;                                  // the total number of leds
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = false;                             // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = true;                                    // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 0;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 4;                                        // hold time before dropping the leds
  float dropFactor = .92;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (set droppingPeak true or false)
  int peakTimeFirstDropDelay = 130;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .93;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60)
  //settings for a 60 led ring

  int stripNumOfLeds = 60;                                  // the total number of leds
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = false;                                   // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 1;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 4;                                        // hold time before dropping the leds
  float dropFactor = .92;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (set droppingPeak true or false)
  int peakTimeFirstDropDelay = 130;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .93;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_30)
  //settings for a 30 led strip

  int stripNumOfLeds = 30;                                  // the total number of leds
  uint32_t stripColor[16];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = false;                                   // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 1;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 10;                           // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 10;                                       // hold time before dropping the leds
  float dropFactor = .9;                                    // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (set droppingPeak true or false)
  int peakTimeFirstDropDelay = 150;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 15;                               // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 3;                           // how many leds to bounce up (max)
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 9;                           // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_2_rings_24)
  //settings for 2 24 led rings

  int stripNumOfLeds = 48;
  uint32_t stripColor[25];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 5;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 2;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 10;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 3;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined(led_2_rings_30)
  //settings for 2 30 led rings

  int stripNumOfLeds = 60;
  uint32_t stripColor[31];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 5;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 2;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 10;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 3;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined (led_strip_200)
  //settings for a 200 led strip

  int stripNumOfLeds = 200;
  uint32_t stripColor[101];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 10;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 30;
  float peakDropFactor = .99;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 8;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined (led_strip_144)
  //settings for a 200 led strip

  int stripNumOfLeds = 145;
  uint32_t stripColor[73];
  int displayMiddleLed = true;
  int splitStrip = false;
  int middleOffset = 1;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 10;
  float dropFactor = .85;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 5;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 10;
  int bouncingPeakDelay = 2;
  int bouncingPeakCounterInc = 10;
#endif

//
// setup other variables, user editable
//

// basic settings
int minValue = 10;                                        // min analog input value
int maxValue = 350;                                       // max analog input value (0-1023 equals 0-5V)
int sensitivityValue = 128;                               // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)
int maxSensitivity = 2 * 255;                             // let the 'volume' go up to 200%!
int ledBrightness = 30;                                   // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)
int sensorDeviationBrightness = 1;                        // eliminate fluctuating values
int overflowDelay = 20;                                   // overflow hold time

// peak settings
int displayPeaks = true;                                  // value will be set by the switch if useSensorValues = true
int droppingPeak = true;                                  // display dropping peaks or not. note: displayPeaks has to be true 
int bouncingPeaks = true;                                 // display bouncing peaks or not. note: displayPeaks has to be true 

//
// initialize other variables needed for the sketch
//

int numOfSegments = stripNumOfLeds / 2;
int halfNumOfSegments = numOfSegments / 2; 
int stripMiddle = stripNumOfLeds / 2;
int maxDisplaySegments = stripMiddle - 1;
float sensitivityFactor;

int brightnessValue, prevBrightnessValue;
float ledFactor, ledFactor_div_numOfSegments;

int leftValue = 0, rightValue = 0, maxReadValue = 0;
int leftAnalogValue = 0, rightAnalogValue = 0;

int prevLeftValue = 0, prevRightValue = 0;
int prevLeftAnalogValue = 0, prevRightAnalogValue = 0;

int i, j;
int dropLeft, dropRight;
int leftDropTime, rightDropTime;

int leftPeak = 0, rightPeak = 0;
int leftPeakTime = 0, rightPeakTime = 0;
int leftFirstPeak = true, rightFirstPeak = true;
int readShowPeaksPin, prevReadShowPeaksPin;

uint32_t stripMiddleColor, stripOverflowColor, stripHoldColor;

int leftPeakBouncing = false, rightPeakBouncing = false;
int leftPeakBounce = 0, rightPeakBounce = 0;
int prevLeftPeakBounce = 0, prevRightPeakBounce = 0;
int leftPeakBounceCounter = 0, rightPeakBounceCounter = 0;
int leftPeakBounceDelayCounter = 0, rightPeakBounceDelayCounter = 0;

//
// initialize the strip or rings
//

Adafruit_NeoPixel strip = Adafruit_NeoPixel(stripNumOfLeds, stripPin, NEO_GRB + NEO_KHZ800);

//
// setup
//

void setup() {
  #ifdef DEBUG
    Serial.begin(9600);
  #endif
  
  pinMode(showPeaksPin, INPUT);  

  strip.begin();
  
  setStripColors();
  startupAnimation();
  
  if (useSensorValues) 
    setInitialDisplayPeaks();
  else
    setSensitivityFactor();
}

//
// main loop
//

void loop() {
  if (useSensorValues) 
    readSensorValues();
  
  readValues();
  drawValues();

  if (displayPeaks) {
    getPeaks();
    drawPeaks();
  }

  storePrevValues();
}

// 
// functions
//

void setInitialDisplayPeaks() {
  readShowPeaksPin = digitalRead(showPeaksPin);
  if (readShowPeaksPin == HIGH)
    displayPeaks = false;
  else
    displayPeaks = true;
  prevReadShowPeaksPin = readShowPeaksPin;
}

void readSensorValues() {
  readShowPeaksPin = digitalRead(showPeaksPin);

  if (momentarySwitch) {
    if (readShowPeaksPin == LOW && prevReadShowPeaksPin == HIGH) {
      if (displayPeaks == true) {
        displayPeaks = false;
        clearLeftPeak();
        clearRightPeak();        
        if (momentarySwitch)
          while (digitalRead(showPeaksPin) == LOW) {}
      }
      else {
        displayPeaks = true;
      }
    }
  } 
  else {
    if (readShowPeaksPin == LOW && prevReadShowPeaksPin == HIGH) 
      displayPeaks = true;
    else if (readShowPeaksPin == HIGH && prevReadShowPeaksPin == LOW) {
      displayPeaks = false;
      clearLeftPeak();
      clearRightPeak();        
    }
  }
  prevReadShowPeaksPin = readShowPeaksPin;
  
  brightnessValue = analogRead(brightnessPin);
  brightnessValue = map(brightnessValue, 0, 1023, 0, 255);
  
  if (abs(brightnessValue - prevBrightnessValue) > sensorDeviationBrightness) {
    ledBrightness = brightnessValue;
    setStripColors();
    prevBrightnessValue = brightnessValue;
  }

  sensitivityValue = analogRead(sensitivityPin);
  sensitivityValue = map(sensitivityValue, 0, 1023, 0, 255);
  setSensitivityFactor();
}

void setSensitivityFactor() {
  //sensitivityValue_div_numOfSegments = sensitivityValue / numOfSegments;
  sensitivityFactor = ((float) sensitivityValue / 255 * (float) maxSensitivity / 255);
}

void readValues() {
  leftAnalogValue = analogRead(leftPin);
  rightAnalogValue = analogRead(rightPin);

  if (swapLeftRight) {
    int tempValue = leftAnalogValue;
    leftAnalogValue = rightAnalogValue;
    rightAnalogValue = tempValue;
  }

  if (leftAnalogValue < prevLeftAnalogValue) {
    leftDropTime++;
    if (leftDropTime > dropDelay) {
      leftAnalogValue = prevLeftAnalogValue * dropFactor;
      leftDropTime = 0;
    }
    else
      leftAnalogValue = prevLeftAnalogValue;
  }
   
  if (rightAnalogValue < prevRightAnalogValue) {
    rightDropTime++;
    if (rightDropTime > dropDelay) {
      rightAnalogValue = prevRightAnalogValue * dropFactor;
      rightDropTime = 0;
    }
    else
      rightAnalogValue = prevRightAnalogValue;
  }

  #ifdef DEBUG
    Serial.print(leftAnalogValue);
    Serial.print(" ");
    Serial.println(rightAnalogValue);
  #endif  

  // map values  
  leftValue = map(leftAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);
  rightValue = map(rightAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);

  if (leftValue > maxDisplaySegments) {
      leftValue = maxDisplaySegments;
      drawOverflow();
  }
  
  if (rightValue > maxDisplaySegments) {
      rightValue = maxDisplaySegments;
      drawOverflow();
  }
}

void storePrevValues() {
  prevLeftAnalogValue = leftAnalogValue;
  prevRightAnalogValue = rightAnalogValue;

  prevLeftValue = leftValue;
  prevRightValue = rightValue;
}

void getPeaks() {
  if (leftValue > leftPeak) {
    leftPeak = leftValue;
    leftPeakTime = 0;
    leftFirstPeak = true;

    if (bouncingPeaks) {
      leftPeakBouncing = true;
      leftPeakBounceCounter = 0;
      leftPeakBounceDelayCounter = 0;
    }
  }
  else {
    leftPeakTime++;
    if (droppingPeak) {
      if (leftFirstPeak) {
        if (leftPeakTime > peakTimeFirstDropDelay) {
          clearLeftPeak();
          leftFirstPeak = false;
        }
      }
      else {
        if (leftPeakTime > peakTimeDropDelay) {
          clearLeftPeak();
        }
      }
    }
    else {
      if (leftPeakTime > peakTimeNoDropDelay) {
        clearLeftPeak();
      }
    }
  }

  if (leftPeakBouncing) {
    if (leftFirstPeak) {
      leftPeakBounceDelayCounter++;
      if (leftPeakBounceDelayCounter >= bouncingPeakDelay) {
        leftPeakBounceDelayCounter = 0;
        leftPeakBounceCounter += bouncingPeakCounterInc;
  
        if (leftPeakBounceCounter >= 180) {
          clearLeftBouncePeak();
          clearLeftBounce();
        }
        else {        
          leftPeakBounce = min((sin(leftPeakBounceCounter * 0.0174532925) * bouncingPeaksNumOfLeds), (maxDisplaySegments - leftPeak));
          if (leftPeakBounce != prevLeftPeakBounce) {
            clearLeftBouncePeak();
          }
          prevLeftPeakBounce = leftPeakBounce;
        }
      }
    }
  }

  if (rightValue > rightPeak) {
    rightPeak = rightValue;
    rightPeakTime = 0;
    rightFirstPeak = true;

    if (bouncingPeaks) {
      rightPeakBouncing = true;
      rightPeakBounceCounter = 0;
      rightPeakBounceDelayCounter = 0;
    }
  }
  else {
    rightPeakTime++;
    if (droppingPeak) {
      if (rightFirstPeak) {
        if (rightPeakTime > peakTimeFirstDropDelay) {
          clearRightPeak();
          rightFirstPeak = false;
        }
      }
      else {
        if (rightPeakTime > peakTimeDropDelay)
          clearRightPeak();
      }
    }
    else {
      if (rightPeakTime > peakTimeNoDropDelay)
        clearRightPeak();
    }
  }

  if (rightPeakBouncing) {
    if (rightFirstPeak) {
      rightPeakBounceDelayCounter++;
      if (rightPeakBounceDelayCounter >= bouncingPeakDelay) {
        rightPeakBounceDelayCounter = 0;
        rightPeakBounceCounter += bouncingPeakCounterInc;
  
        if (rightPeakBounceCounter >= 180) {
          clearRightBouncePeak();
          clearRightBounce();
        }
        else {        
          rightPeakBounce = min((sin(rightPeakBounceCounter * 0.0174532925) * bouncingPeaksNumOfLeds), (maxDisplaySegments - rightPeak));
          if (rightPeakBounce != prevRightPeakBounce) {
            clearRightBouncePeak();
          }
          prevRightPeakBounce = rightPeakBounce;
        }
      }
    }
  }
}

void drawValues() {
  if (splitStrip) {
    for (i = middleOffset; i < leftValue; i++)
      strip.setPixelColor(i, stripColor[i]);
  
    for (i = prevLeftValue; i > leftValue; i--)
      strip.setPixelColor(i, 0);
  
    for (i = middleOffset; i < rightValue; i++)
      strip.setPixelColor(stripMiddle + i, stripColor[i]);
  
    for (i = prevRightValue; i > rightValue; i--)
      strip.setPixelColor(stripMiddle + i, 0);
  }
  else {
    for (i = middleOffset; i < leftValue; i++)
      strip.setPixelColor(stripMiddle + i, stripColor[i]);
  
    for (i = prevLeftValue; i > leftValue; i--)
      strip.setPixelColor(stripMiddle + i, 0);
  
    for (i = middleOffset; i < rightValue; i++)
      strip.setPixelColor(stripMiddle - i, stripColor[i]);
  
    for (i = prevRightValue; i > rightValue; i--)
      strip.setPixelColor(stripMiddle - i, 0);
  }

  if (displayMiddleLed) strip.setPixelColor(stripMiddle, stripMiddleColor);
  strip.show();
}

void drawPeaks() {
  if (leftPeak > 0) {
    if (droppingPeakFade && leftPeakBouncing == false)
      stripHoldColor = strip.Color(max(1, (255 * leftPeak * ledFactor_div_numOfSegments)), 0, 0);
    else
      stripHoldColor = stripColor[numOfSegments];

    if (splitStrip)
      strip.setPixelColor((leftPeak + leftPeakBounce), stripHoldColor);
    else
      strip.setPixelColor(stripMiddle + (leftPeak + leftPeakBounce), stripHoldColor);
  } 
  
  if (rightPeak > 0) {
    if (droppingPeakFade && rightPeakBouncing == false)
      stripHoldColor = strip.Color(max(1, (255 * rightPeak * ledFactor_div_numOfSegments)), 0, 0);    
    else
      stripHoldColor = stripColor[numOfSegments];

    if (splitStrip)
      strip.setPixelColor(stripMiddle + rightPeak + prevRightPeakBounce, stripHoldColor);
    else 
      strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), stripHoldColor);
  }

  if (leftPeak > 0 || rightPeak > 0)
    strip.show();    
}

void clearLeftPeak() {
  if (splitStrip)
    strip.setPixelColor((leftPeak + prevLeftPeakBounce), 0);
  else
    strip.setPixelColor(stripMiddle + (leftPeak + prevLeftPeakBounce), 0);

  if (droppingPeak)
    leftPeak = leftPeak * peakDropFactor;
  else
    leftPeak = 0;
  leftPeakTime = 0;
}

void clearLeftBounce() {
  leftPeakBouncing = false;
  leftPeakBounceCounter = 0;
  leftPeakBounce = 0;
  prevLeftPeakBounce = 0;
}

void clearLeftBouncePeak() {
  if (splitStrip)
    strip.setPixelColor((leftPeak + prevLeftPeakBounce), 0);
  else
    strip.setPixelColor(stripMiddle + (leftPeak + prevLeftPeakBounce), 0);
}

void clearRightPeak() {
  if (splitStrip)
    strip.setPixelColor(stripMiddle + rightPeak + prevRightPeakBounce, 0);
  else 
    strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), 0);
  
  if (droppingPeak)
    rightPeak = rightPeak * peakDropFactor;
  else
    rightPeak = 0;
  rightPeakTime = 0;
}

void clearRightBounce() {
  rightPeakBouncing = false;
  rightPeakBounceCounter = 0;
  rightPeakBounce = 0;
  prevRightPeakBounce = 0;
}

void clearRightBouncePeak() {
  if (splitStrip)
    strip.setPixelColor((stripMiddle + rightPeak + prevRightPeakBounce), 0);
  else
    strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), 0);
}

void drawOverflow() {
  for (i = 0; i <= numOfSegments; i++) {
    strip.setPixelColor(stripMiddle + i, stripOverflowColor);
    strip.setPixelColor(stripMiddle - i, stripOverflowColor);
  }
  strip.show();
  delay(overflowDelay);

  for (i = 0; i <= numOfSegments; i++) {
    strip.setPixelColor(stripMiddle + i, 0);
    strip.setPixelColor(stripMiddle - i, 0);
  }
  strip.show();
}

void setStripColors() {
  int orangeLimit;
  ledFactor = (float)ledBrightness / 255;

  float orangeFactor = orangeLimitAmount / halfNumOfSegments;
  ledFactor_div_numOfSegments = ledFactor / numOfSegments;
  
  stripOverflowColor = strip.Color(min(255, 255 * ledFactor * 1.5), 0, 0);
  stripMiddleColor = strip.Color(0, 0, 255 * ledFactor);

  stripColor[0] = strip.Color(0, 255 * ledFactor, 0);
  for (i = 1; i <= numOfSegments; i++) {
    if (i <= halfNumOfSegments)
      orangeLimit = (i * orangeFactor);
    else
      orangeLimit = ((numOfSegments - i) * orangeFactor);

    stripColor[i] = strip.Color((255 * i * ledFactor_div_numOfSegments), ((255 - orangeLimit) * (numOfSegments - i) * ledFactor_div_numOfSegments), 0); 
  }

  stripHoldColor = stripColor[numOfSegments];
}

void startupAnimation() {  
  for (j = 0; j < 2; j++) {
    for (i = 0; i <= numOfSegments; i++) {
      strip.setPixelColor(stripMiddle - i, stripColor[i]);
      strip.setPixelColor(stripMiddle + i, stripColor[i]);
      strip.show();
      delay(startupAnimationDelay);
    }
    
    for (i = 0; i <= numOfSegments; i++) {
      strip.setPixelColor(stripMiddle + i, 0);
      strip.setPixelColor(stripMiddle - i, 0);
      strip.show();
      delay(startupAnimationDelay);
    }
  }
}

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**********************************************************************

* Stereo VU Meter for 1 or 2 LED rings or strips build by ericBcreator

* Designed to be used with an Arduino UNO, Nano or compatible device.

**********************************************************************

* Last updated 20171105 by ericBcreator

* This code is free for personal use, not for commercial purposes.

* Please leave this header intact.

* contact: ericBcreator@gmail.com

**********************************************************************

//#define DEBUG // for debugging

// include the NeoPixel library:

#include <Adafruit_NeoPixel.h>

// uncomment the definition for the connected strip or ring(s)

//#define led_ring_60

//#define led_strip_60

//#define led_strip_30

#define led_2_rings_24

//#define led_2_rings_30

//#define led_strip_200

//#define led_strip_144

// important setting: using potentiometer sensor values or not

// This setting has to be set right or the script will not work correctly:

// - set this to true if using potentiometers

// - set this to false if not using potentiometers

const int useSensorValues = true;

// setup pins

int leftPin = A0, rightPin = A1; // left audio in on analog 0, right on analog 1

int brightnessPin = A4, sensitivityPin = A5; // potentiometers for brightness and sensitivity on analog 4 and 5

int stripPin = 6; // DIN of leds on digital pin 6

int showPeaksPin = 7; // switch to toggle peaks on or off on digital pin 7

int momentarySwitch = false; // set false for an on/off toggle switch

// setup variables for the number of leds and led strip or 2 rings

#if defined (led_ring_60)

//settings for a 60 led ring

int stripNumOfLeds = 60; // the total number of leds

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = false; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = true; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 0; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 4; // hold time before dropping the leds

float dropFactor = .92; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (set droppingPeak true or false)

int peakTimeFirstDropDelay = 130; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .93; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60)

//settings for a 60 led ring

int stripNumOfLeds = 60; // the total number of leds

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = false; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 1; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 4; // hold time before dropping the leds

float dropFactor = .92; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (set droppingPeak true or false)

int peakTimeFirstDropDelay = 130; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .93; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_30)

//settings for a 30 led strip

int stripNumOfLeds = 30; // the total number of leds

uint32_t stripColor[16]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = false; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 1; // offset for the middle led when using one strip

int startupAnimationDelay = 10; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 10; // hold time before dropping the leds

float dropFactor = .9; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (set droppingPeak true or false)

int peakTimeFirstDropDelay = 150; // peak hold time when dropping the first peak

int peakTimeDropDelay = 15; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 3; // how many leds to bounce up (max)

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 9; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_2_rings_24)

//settings for 2 24 led rings

int stripNumOfLeds = 48;

uint32_t stripColor[25];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 5;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 2;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 10;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 3;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined(led_2_rings_30)

//settings for 2 30 led rings

int stripNumOfLeds = 60;

uint32_t stripColor[31];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 5;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 2;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 10;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 3;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined (led_strip_200)

//settings for a 200 led strip

int stripNumOfLeds = 200;

uint32_t stripColor[101];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 10;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 30;

float peakDropFactor = .99;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 8;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined (led_strip_144)

//settings for a 200 led strip

int stripNumOfLeds = 145;

uint32_t stripColor[73];

int displayMiddleLed = true;

int splitStrip = false;

int middleOffset = 1;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 10;

float dropFactor = .85;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 5;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 10;

int bouncingPeakDelay = 2;

int bouncingPeakCounterInc = 10;

#endif

// setup other variables, user editable

// basic settings

int minValue = 10; // min analog input value

int maxValue = 350; // max analog input value (0-1023 equals 0-5V)

int sensitivityValue = 128; // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)

int maxSensitivity = 2 * 255; // let the 'volume' go up to 200%!

int ledBrightness = 30; // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)

int sensorDeviationBrightness = 1; // eliminate fluctuating values

int overflowDelay = 20; // overflow hold time

// peak settings

int displayPeaks = true; // value will be set by the switch if useSensorValues = true

int droppingPeak = true; // display dropping peaks or not. note: displayPeaks has to be true

int bouncingPeaks = true; // display bouncing peaks or not. note: displayPeaks has to be true

// initialize other variables needed for the sketch

int numOfSegments = stripNumOfLeds / 2;

int halfNumOfSegments = numOfSegments / 2;

int stripMiddle = stripNumOfLeds / 2;

int maxDisplaySegments = stripMiddle - 1;

float sensitivityFactor;

int brightnessValue, prevBrightnessValue;

float ledFactor, ledFactor_div_numOfSegments;

int leftValue = 0, rightValue = 0, maxReadValue = 0;

int leftAnalogValue = 0, rightAnalogValue = 0;

int prevLeftValue = 0, prevRightValue = 0;

int prevLeftAnalogValue = 0, prevRightAnalogValue = 0;

int i, j;

int dropLeft, dropRight;

int leftDropTime, rightDropTime;

int leftPeak = 0, rightPeak = 0;

int leftPeakTime = 0, rightPeakTime = 0;

int leftFirstPeak = true, rightFirstPeak = true;

int readShowPeaksPin, prevReadShowPeaksPin;

uint32_t stripMiddleColor, stripOverflowColor, stripHoldColor;

int leftPeakBouncing = false, rightPeakBouncing = false;

int leftPeakBounce = 0, rightPeakBounce = 0;

int prevLeftPeakBounce = 0, prevRightPeakBounce = 0;

int leftPeakBounceCounter = 0, rightPeakBounceCounter = 0;

int leftPeakBounceDelayCounter = 0, rightPeakBounceDelayCounter = 0;

// initialize the strip or rings

Adafruit_NeoPixel strip = Adafruit_NeoPixel(stripNumOfLeds, stripPin, NEO_GRB + NEO_KHZ800);

// setup

void setup() {

#ifdef DEBUG

Serial.begin(9600);

#endif

pinMode(showPeaksPin, INPUT);

strip.begin();

setStripColors();

startupAnimation();

if (useSensorValues)

setInitialDisplayPeaks();

else

setSensitivityFactor();

}

// main loop

void loop() {

if (useSensorValues)

readSensorValues();

readValues();

drawValues();

if (displayPeaks) {

getPeaks();

drawPeaks();

}

storePrevValues();

}

// functions

void setInitialDisplayPeaks() {

readShowPeaksPin = digitalRead(showPeaksPin);

if (readShowPeaksPin == HIGH)

displayPeaks = false;

else

displayPeaks = true;

prevReadShowPeaksPin = readShowPeaksPin;

}

void readSensorValues() {

readShowPeaksPin = digitalRead(showPeaksPin);

if (momentarySwitch) {

if (readShowPeaksPin == LOW && prevReadShowPeaksPin == HIGH) {

if (displayPeaks == true) {

displayPeaks = false;

clearLeftPeak();

clearRightPeak();

if (momentarySwitch)

while (digitalRead(showPeaksPin) == LOW) {}

}

else {

displayPeaks = true;

}

else {

if (readShowPeaksPin == LOW && prevReadShowPeaksPin == HIGH)

displayPeaks = true;

else if (readShowPeaksPin == HIGH && prevReadShowPeaksPin == LOW) {

displayPeaks = false;

clearLeftPeak();

clearRightPeak();

}

prevReadShowPeaksPin = readShowPeaksPin;

brightnessValue = analogRead(brightnessPin);

brightnessValue = map(brightnessValue, 0, 1023, 0, 255);

if (abs(brightnessValue - prevBrightnessValue) > sensorDeviationBrightness) {

ledBrightness = brightnessValue;

setStripColors();

prevBrightnessValue = brightnessValue;

}

sensitivityValue = analogRead(sensitivityPin);

sensitivityValue = map(sensitivityValue, 0, 1023, 0, 255);

setSensitivityFactor();

}

void setSensitivityFactor() {

//sensitivityValue_div_numOfSegments = sensitivityValue / numOfSegments;

sensitivityFactor = ((float) sensitivityValue / 255 * (float) maxSensitivity / 255);

}

void readValues() {

leftAnalogValue = analogRead(leftPin);

rightAnalogValue = analogRead(rightPin);

if (swapLeftRight) {

int tempValue = leftAnalogValue;

leftAnalogValue = rightAnalogValue;

rightAnalogValue = tempValue;

}

if (leftAnalogValue < prevLeftAnalogValue) {

leftDropTime++;

if (leftDropTime > dropDelay) {

leftAnalogValue = prevLeftAnalogValue * dropFactor;

leftDropTime = 0;

}

else

leftAnalogValue = prevLeftAnalogValue;

}

if (rightAnalogValue < prevRightAnalogValue) {

rightDropTime++;

if (rightDropTime > dropDelay) {

rightAnalogValue = prevRightAnalogValue * dropFactor;

rightDropTime = 0;

}

else

rightAnalogValue = prevRightAnalogValue;

}

#ifdef DEBUG

Serial.print(leftAnalogValue);

Serial.print(" ");

Serial.println(rightAnalogValue);

#endif

// map values

leftValue = map(leftAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);

rightValue = map(rightAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);

if (leftValue > maxDisplaySegments) {

leftValue = maxDisplaySegments;

drawOverflow();

}

if (rightValue > maxDisplaySegments) {

rightValue = maxDisplaySegments;

drawOverflow();

}

void storePrevValues() {

prevLeftAnalogValue = leftAnalogValue;

prevRightAnalogValue = rightAnalogValue;

prevLeftValue = leftValue;

prevRightValue = rightValue;

}

void getPeaks() {

if (leftValue > leftPeak) {

leftPeak = leftValue;

leftPeakTime = 0;

leftFirstPeak = true;

if (bouncingPeaks) {

leftPeakBouncing = true;

leftPeakBounceCounter = 0;

leftPeakBounceDelayCounter = 0;

}

else {

leftPeakTime++;

if (droppingPeak) {

if (leftFirstPeak) {

if (leftPeakTime > peakTimeFirstDropDelay) {

clearLeftPeak();

leftFirstPeak = false;

}

else {

if (leftPeakTime > peakTimeDropDelay) {

clearLeftPeak();

}

else {

if (leftPeakTime > peakTimeNoDropDelay) {

clearLeftPeak();

}

if (leftPeakBouncing) {

if (leftFirstPeak) {

leftPeakBounceDelayCounter++;

if (leftPeakBounceDelayCounter >= bouncingPeakDelay) {

leftPeakBounceDelayCounter = 0;

leftPeakBounceCounter += bouncingPeakCounterInc;

if (leftPeakBounceCounter >= 180) {

clearLeftBouncePeak();

clearLeftBounce();

}

else {

leftPeakBounce = min((sin(leftPeakBounceCounter * 0.0174532925) * bouncingPeaksNumOfLeds), (maxDisplaySegments - leftPeak));

if (leftPeakBounce != prevLeftPeakBounce) {

clearLeftBouncePeak();

}

prevLeftPeakBounce = leftPeakBounce;

}

if (rightValue > rightPeak) {

rightPeak = rightValue;

rightPeakTime = 0;

rightFirstPeak = true;

if (bouncingPeaks) {

rightPeakBouncing = true;

rightPeakBounceCounter = 0;

rightPeakBounceDelayCounter = 0;

}

else {

rightPeakTime++;

if (droppingPeak) {

if (rightFirstPeak) {

if (rightPeakTime > peakTimeFirstDropDelay) {

clearRightPeak();

rightFirstPeak = false;

}

else {

if (rightPeakTime > peakTimeDropDelay)

clearRightPeak();

}

else {

if (rightPeakTime > peakTimeNoDropDelay)

clearRightPeak();

}

if (rightPeakBouncing) {

if (rightFirstPeak) {

rightPeakBounceDelayCounter++;

if (rightPeakBounceDelayCounter >= bouncingPeakDelay) {

rightPeakBounceDelayCounter = 0;

rightPeakBounceCounter += bouncingPeakCounterInc;

if (rightPeakBounceCounter >= 180) {

clearRightBouncePeak();

clearRightBounce();

}

else {

rightPeakBounce = min((sin(rightPeakBounceCounter * 0.0174532925) * bouncingPeaksNumOfLeds), (maxDisplaySegments - rightPeak));

if (rightPeakBounce != prevRightPeakBounce) {

clearRightBouncePeak();

}

prevRightPeakBounce = rightPeakBounce;

}

void drawValues() {

if (splitStrip) {

for (i = middleOffset; i < leftValue; i++)

strip.setPixelColor(i, stripColor[i]);

for (i = prevLeftValue; i > leftValue; i--)

strip.setPixelColor(i, 0);

for (i = middleOffset; i < rightValue; i++)

strip.setPixelColor(stripMiddle + i, stripColor[i]);

for (i = prevRightValue; i > rightValue; i--)

strip.setPixelColor(stripMiddle + i, 0);

}

else {

for (i = middleOffset; i < leftValue; i++)

strip.setPixelColor(stripMiddle + i, stripColor[i]);

for (i = prevLeftValue; i > leftValue; i--)

strip.setPixelColor(stripMiddle + i, 0);

for (i = middleOffset; i < rightValue; i++)

strip.setPixelColor(stripMiddle - i, stripColor[i]);

for (i = prevRightValue; i > rightValue; i--)

strip.setPixelColor(stripMiddle - i, 0);

}

if (displayMiddleLed) strip.setPixelColor(stripMiddle, stripMiddleColor);

strip.show();

}

void drawPeaks() {

if (leftPeak > 0) {

if (droppingPeakFade && leftPeakBouncing == false)

stripHoldColor = strip.Color(max(1, (255 * leftPeak * ledFactor_div_numOfSegments)), 0, 0);

else

stripHoldColor = stripColor[numOfSegments];

if (splitStrip)

strip.setPixelColor((leftPeak + leftPeakBounce), stripHoldColor);

else

strip.setPixelColor(stripMiddle + (leftPeak + leftPeakBounce), stripHoldColor);

}

if (rightPeak > 0) {

if (droppingPeakFade && rightPeakBouncing == false)

stripHoldColor = strip.Color(max(1, (255 * rightPeak * ledFactor_div_numOfSegments)), 0, 0);

else

stripHoldColor = stripColor[numOfSegments];

if (splitStrip)

strip.setPixelColor(stripMiddle + rightPeak + prevRightPeakBounce, stripHoldColor);

else

strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), stripHoldColor);

}

if (leftPeak > 0 || rightPeak > 0)

strip.show();

}

void clearLeftPeak() {

if (splitStrip)

strip.setPixelColor((leftPeak + prevLeftPeakBounce), 0);

else

strip.setPixelColor(stripMiddle + (leftPeak + prevLeftPeakBounce), 0);

if (droppingPeak)

leftPeak = leftPeak * peakDropFactor;

else

leftPeak = 0;

leftPeakTime = 0;

}

void clearLeftBounce() {

leftPeakBouncing = false;

leftPeakBounceCounter = 0;

leftPeakBounce = 0;

prevLeftPeakBounce = 0;

}

void clearLeftBouncePeak() {

if (splitStrip)

strip.setPixelColor((leftPeak + prevLeftPeakBounce), 0);

else

strip.setPixelColor(stripMiddle + (leftPeak + prevLeftPeakBounce), 0);

}

void clearRightPeak() {

if (splitStrip)

strip.setPixelColor(stripMiddle + rightPeak + prevRightPeakBounce, 0);

else

strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), 0);

if (droppingPeak)

rightPeak = rightPeak * peakDropFactor;

else

rightPeak = 0;

rightPeakTime = 0;

}

void clearRightBounce() {

rightPeakBouncing = false;

rightPeakBounceCounter = 0;

rightPeakBounce = 0;

prevRightPeakBounce = 0;

}

void clearRightBouncePeak() {

if (splitStrip)

strip.setPixelColor((stripMiddle + rightPeak + prevRightPeakBounce), 0);

else

strip.setPixelColor(stripMiddle - (rightPeak + prevRightPeakBounce), 0);

}

void drawOverflow() {

for (i = 0; i <= numOfSegments; i++) {

strip.setPixelColor(stripMiddle + i, stripOverflowColor);

strip.setPixelColor(stripMiddle - i, stripOverflowColor);

}

strip.show();

delay(overflowDelay);

for (i = 0; i <= numOfSegments; i++) {

strip.setPixelColor(stripMiddle + i, 0);

strip.setPixelColor(stripMiddle - i, 0);

}

strip.show();

}

void setStripColors() {

int orangeLimit;

ledFactor = (float)ledBrightness / 255;

float orangeFactor = orangeLimitAmount / halfNumOfSegments;

ledFactor_div_numOfSegments = ledFactor / numOfSegments;

stripOverflowColor = strip.Color(min(255, 255 * ledFactor * 1.5), 0, 0);

stripMiddleColor = strip.Color(0, 0, 255 * ledFactor);

stripColor[0] = strip.Color(0, 255 * ledFactor, 0);

for (i = 1; i <= numOfSegments; i++) {

if (i <= halfNumOfSegments)

orangeLimit = (i * orangeFactor);

else

orangeLimit = ((numOfSegments - i) * orangeFactor);

stripColor[i] = strip.Color((255 * i * ledFactor_div_numOfSegments), ((255 - orangeLimit) * (numOfSegments - i) * ledFactor_div_numOfSegments), 0);

}

stripHoldColor = stripColor[numOfSegments];

}

void startupAnimation() {

for (j = 0; j < 2; j++) {

for (i = 0; i <= numOfSegments; i++) {

strip.setPixelColor(stripMiddle - i, stripColor[i]);

strip.setPixelColor(stripMiddle + i, stripColor[i]);

strip.show();

delay(startupAnimationDelay);

}

for (i = 0; i <= numOfSegments; i++) {

strip.setPixelColor(stripMiddle + i, 0);

strip.setPixelColor(stripMiddle - i, 0);

strip.show();

delay(startupAnimationDelay);

}

Скетч для версии проекта 02.02.2018

/*
**********************************************************************
* Stereo VU Meter for 1 or 2 LED rings or strips build by ericBcreator
* Designed to be used with an Arduino UNO, Nano or compatible device.
**********************************************************************
* Notice: search for @EB in the Sketch for important variables to set
* for the Sketch to work with your setup.
**********************************************************************
* Last updated 20180202 by ericBcreator
*
* This code is free for personal use, not for commercial purposes.
* Please leave this header intact.
*
* contact: ericBcreator@gmail.com
**********************************************************************
*/

//
// include the NeoPixel library:
//

#include <Adafruit_NeoPixel.h>

//
// debugging settings
//
//#define DEBUG                                             // debug: enable serial.print 
//#define DEBUG_NO_PEAK_SWITCH                              // debug: no peak switch connected @EB
//#define DEBUG_TEST_LEDS                                   // debug: display each led (color) slowly at startup
//#define DEBUG_PRINT_LOOP_TIME                             // debug: serial.print the looptime in ms
//#define DEBUG_PRINT_ANALOGVALUES                          // debug: serial.print analog input values
//#define DEBUG_NO_PEAKS                                    // debug: display no peaks, ignoring other settings
//#define DEBUG_PEAKS                                       // debug: display peaks, ignoring other settings

//
// uncomment to average the input levels to the number defined by averageNumOfReadings. increasing the value will make the script less responsive
//
//#define averageReadings                                     // average input levels or not
//#define averageNumOfReadings 3                              // num of readings for averaging

//
// uncomment to map the linear audio input to non-linear response
//
//#define nonLinearSinAudio                                  // uncomment to map the linear audio input signal to a non-linear, reverse audio-taper response (sin wave)
//#define nonLinearReverseSinAudio                           // uncomment to map the linear audio input signal to a non-linear, audio-taper response (reverse sin wave)
#define nonLinearLogAudio                                   // uncomment to map the linear audio input signal to a log response
//#define nonLinearAvr2                                       // uncomment to average the original input with the non-linear response

//
// overflow settings
//
//#define displayOverflow                                     // display overflow or not
//#define compressOverflowPeaks                               // compress overflow peaks or not
//#define compressOverflowNumOfTimes 2                        // num of times to apply the compressOverflowFactor
//float compressOverflowFactor = .05;                         // factor for compression

//
// uncomment when using high level (non-consumer) inputs
// 
//#define highLevelInput                                      // @EB define for high level inputs

//
// uncomment the definition for the connected strip or ring(s) @EB
//

//#define led_matrix_40
//#define led_ring_60
//#define led_ring_60_ps
#define led_rhombus_160_ps
//#define led_strip_60
//#define led_strip_60_qr
//#define led_strip_30
//#define led_2_rings_24
//#define led_2_rings_30
//#define led_strip_200
//#define led_strip_144
//#define led_2_strip_63
//#define led_2_strip_63_qr

//
// important setting: using potentiometer sensor values or not
// This setting has to be set right or the script will not work correctly:
// - set to true if using potentiometers
// - set to false if not using potentiometers
//

const int useSensorValues = true;                         // @EB

//
// setup pins
//

int leftPin = A0, rightPin = A1;                          // left audio in on analog 0, right on analog 1
int brightnessPin = A4, sensitivityPin = A5;              // potentiometers for brightness and sensitivity on analog 4 and 5
int leftStripPin = 5;                                     // DIN of left led strip on digital pin 5
int rightStripPin = 6;                                    // DIN of right led strip on digital pin 6
int showPeaksPin = 7;                                     // switch to toggle peaks on or off on digital pin 7 (7, 9 for box version)
int showPeaksMomentarySwitch = false;                     // set false for an on/off toggle switch
int reverseShowPeaks = true;                              // reverses the on/off setting in case you made a wiring mistake ;-) @EB
int selectButton1Pin = 8;                                 // push button for changing settings on digital pin 8
int useSelectButton1 = true;                              // set to false if no push button1 for selecting the color scheme is connected  @EB
int selectButton2Pin = 9;                                // push button for changing settings on digital pin 9
int useSelectButton2 = true;                              // set to false if no push button2 is connected  @EB

//
// setup variables for the number of leds and led strip or 2 rings
//

#if defined (led_matrix_40)
  //settings for a 40 led matrix

  int stripNumOfLeds = 40;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[21];                                  // half of the number of leds + 1
  int displayMiddleLed = false;                             // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = true;                                    // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 0;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 5;                                        // hold time before dropping the leds
  float dropFactor = .94;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 150;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 3;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 6;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_ring_60)
  //settings for a 60 led ring

  int stripNumOfLeds = 60;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = false;                             // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = true;                                    // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 0;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 5;                                        // hold time before dropping the leds
  float dropFactor = .94;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 70;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 3;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_ring_60_ps)
  //settings for a 60 led ring - pulsating and spinning settings

  int stripNumOfLeds = 60;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = true;                                    // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 0;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 5;                                        // hold time before dropping the leds
  float dropFactor = .93;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 10;                             // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 10;                          // peak hold time when dropping the first peak
  int peakTimeDropDelay = 6;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .92;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 3;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_rhombus_160_ps)
  //settings for a 160 led rhombus - pulsating and spinning settings

  int stripNumOfLeds = 160;                                 // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[81];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = true;                                    // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 0;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 0;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 4;                                        // hold time before dropping the leds
  float dropFactor = .92;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 150;                            // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 70;                          // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 10;                          // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 5;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 6;                           // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60)
  //settings for a 60 led strip

  int stripNumOfLeds = 60;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = false;                                   // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 1;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 5;                                        // hold time before dropping the leds
  float dropFactor = .94;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 70;                          // peak hold time when dropping the first peak
  int peakTimeDropDelay = 7;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 6;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 3;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 10;                          // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60_qr)
  //settings for a 60 led strip - quick response

  int stripNumOfLeds = 60;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[31];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = false;                                   // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 1;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 6;                            // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 4;                                        // hold time before dropping the leds
  float dropFactor = .92;                                   // value for dropping the leds
  
  int peakTimeNoDropDelay = 0;                              // peak hold time when not dropping the peaks (when droppingPeak is false)
  int peakTimeFirstDropDelay = 0;                           // peak hold time when dropping the first peak
  int peakTimeDropDelay = 0;                                // peak hold time when dropping the rest of the peaks
  float peakDropFactor = 1;                                 // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 0;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 0;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 0;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 180;                         // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_30)
  //settings for a 30 led strip

  int stripNumOfLeds = 30;                                  // the total number of leds
  int stripsOn2Pins = false;                                // set to true if the LED strips or rings are connected to 2 input pins
  uint32_t stripColor[16];                                  // half of the number of leds + 1
  int displayMiddleLed = true;                              // display the middle led (blue). set to true for one strip, false for two strips or rings
  int splitStrip = false;                                   // set to true when using 2 strips or rings, false for one strip
  int middleOffset = 1;                                     // offset for the middle led when using one strip
  int startupAnimationDelay = 10;                           // delay for the startup animation
  int orangeLimitAmount = 0;                                // limit the amount of green of the middle LEDs to make them more orange
  int swapLeftRight = false;                                // swap the left and right input values or not
  
  int dropDelay = 10;                                       // hold time before dropping the leds
  float dropFactor = .9;                                    // value for dropping the leds
  
  int peakTimeNoDropDelay = 250;                            // peak hold time when not dropping the peaks (set droppingPeak true or false)
  int peakTimeFirstDropDelay = 150;                         // peak hold time when dropping the first peak
  int peakTimeDropDelay = 15;                               // peak hold time when dropping the rest of the peaks
  float peakDropFactor = .94;                               // value for dropping the peaks
  int droppingPeakFade = false;                             // display the dropping peak fading to black or not
  
  int bouncingPeaksNumOfLeds = 4;                           // how many leds to bounce up (max)
  int bouncingPeaksNumOfLedsMin = 2;                        // how many leds to bounce up (min) when using dynamicBouncingPeaks
  int bouncingPeakDelay = 4;                                // delay between peak bounce updates
  int bouncingPeakCounterInc = 9;                           // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_2_rings_24)
  //settings for 2 24 led rings

  int stripNumOfLeds = 48;
  int stripsOn2Pins = false;
  uint32_t stripColor[25];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 5;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 2;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 10;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 4;
  int bouncingPeaksNumOfLedsMin = 2;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined(led_2_rings_30)
  //settings for 2 30 led rings

  int stripNumOfLeds = 60;
  int stripsOn2Pins = false;
  uint32_t stripColor[31];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 5;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 2;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 10;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 4;
  int bouncingPeaksNumOfLedsMin = 2;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined (led_strip_200)
  //settings for a 200 led strip

  int stripNumOfLeds = 200;
  int stripsOn2Pins = false;
  uint32_t stripColor[101];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 10;
  float dropFactor = .96;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 30;
  float peakDropFactor = .99;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 8;
  int bouncingPeaksNumOfLedsMin = 4;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 9;

#elif defined (led_strip_144)
  //settings for a 144 led strip

  int stripNumOfLeds = 145;
  int stripsOn2Pins = false;
  uint32_t stripColor[73];
  int displayMiddleLed = true;
  int splitStrip = false;
  int middleOffset = 1;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 4;
  float dropFactor = .92;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 100;
  int peakTimeDropDelay = 5;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 10;
  int bouncingPeaksNumOfLedsMin = 4;
  int bouncingPeakDelay = 2;
  int bouncingPeakCounterInc = 10;

#elif defined (led_2_strip_63)
  //settings for 2 63 led strips

  int stripNumOfLeds = 63;
  int stripsOn2Pins = true;
  uint32_t stripColor[64];
  int displayMiddleLed = true;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 5;
  float dropFactor = .94;
  
  int peakTimeNoDropDelay = 250;
  int peakTimeFirstDropDelay = 70;
  int peakTimeDropDelay = 7;
  float peakDropFactor = .94;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 12;
  int bouncingPeaksNumOfLedsMin = 4;
  int bouncingPeakDelay = 4;
  int bouncingPeakCounterInc = 10;

#elif defined (led_2_strip_63_qr)
  //settings for 2 63 led strips - quick response

  int stripNumOfLeds = 63;
  int stripsOn2Pins = true;
  uint32_t stripColor[64];
  int displayMiddleLed = false;
  int splitStrip = true;
  int middleOffset = 0;
  int startupAnimationDelay = 1;
  int orangeLimitAmount = 0;
  int swapLeftRight = false;
  
  int dropDelay = 4;
  float dropFactor = .92;
  
  int peakTimeNoDropDelay = 200;
  int peakTimeFirstDropDelay = 60;
  int peakTimeDropDelay = 6;
  float peakDropFactor = .92;
  int droppingPeakFade = false;
  
  int bouncingPeaksNumOfLeds = 12;
  int bouncingPeaksNumOfLedsMin = 4;
  int bouncingPeakDelay = 3;
  int bouncingPeakCounterInc = 10;
#endif

//
// setup other user variables
//

// basic settings
int pulsing = true;                                       // pulsing will display from the middle of each strip or ring  @EB

int spinCircle = true;                                    // spin the animation. will not work with stripsOn2Pins  @EB

int animType = 0;                                         // startup animation selection (1 looks nice for 1 ring)  @EB
int colorScheme = 10;                                     // 0: green-red, 1: blue-green, 2: blue-red, 3: red-blue, 4: green-blue, 5: red-green, 6: blue-white-red
                                                          // 7: red-white-blue, 8: green-white-red, 9: green-white-blue, 10: color wheel, 11: spinning color wheel,
	                            						  // 12: as 11 but spread with factor colorScheme12Factor  @EB
int maxColorScheme = 12;                                  // used for looping through the color schemes with the switch button
int colorScheme11SpinDelay = stripNumOfLeds / 4 ;         // delay for spinning scheme 11
int colorScheme12Factor = 3;                              // wheel spread factor for scheme 12 @EB

int minValue = 10;                                        // min analog input value
int sensitivityValue = 110;                               // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)

#ifdef highLevelInput
  int maxValue = 700;                                     // max analog input value (0-1023 equals 0-5V). try 300 for low level input, 700 for high
  int maxSensitivity = 2 * 255;                           // set to a higher setting to amplify low input levels. try 4 * 255 for low level input, 2 * 255 for high
#else
  int maxValue = 300;                                     // max analog input value (0-1023 equals 0-5V). try 300 for low level input, 700 for high
  int maxSensitivity = 4 * 255;                           // set to a higher setting to amplify low input levels. try 4 * 255 for low level input, 2 * 255 for high
#endif

int ledBrightness = 30;                                   // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)
int sensorDeviationBrightness = 3;                        // eliminate fluctuating values
int overflowDelay = 10;                                   // overflow hold time

// peak settings @EB
int displayPeaks = false;                                 // value will be set by the switch if useSensorValues = true
int displayTopAsPeak = true;                              // always display the top LED in peak color
int droppingPeak = true;                                  // display dropping peaks or not. note: displayPeaks has to be true 
int bouncingPeaks = false;                                // display bouncing peaks or not. note: displayPeaks has to be true 
int dynamicBouncingPeaks = false;                         // bounce less with lower peaks. note: bouncingPeaks has to be true 

//
// initialize other variables 
//

int numOfSegments, halfNumOfSegments, stripMiddle, maxDisplaySegments;
float sensitivityFactor;
float nonLinearResponseFactor;

int brightnessValue, prevBrightnessValue;
float ledFactor, ledFactor_div_numOfSegments;

uint32_t stripMiddleColor, stripOverflowColor, stripHoldColor;
uint32_t colorValue;

int leftValue = 0, rightValue = 0, maxReadValue = 0;
int leftValueN = 0, rightValueN = 0;
int leftAnalogValue = 0, rightAnalogValue = 0;
float log10MaxDisplaySegments;

int prevLeftValue = 0, prevRightValue = 0;
int prevLeftAnalogValue = 0, prevRightAnalogValue = 0;

int selectButton1PinState = 0, prevSelectButton1PinState = 0;
int selectButton2PinState = 0, prevSelectButton2PinState = 0;

int selectButton1PinSetting = colorScheme;
int selectButton2PinSetting = 0;

int i, j;
int dropLeft, dropRight;
int leftDropTime, rightDropTime;

int leftPeak = 0, rightPeak = 0;
int leftPeakTime = 0, rightPeakTime = 0;
int leftFirstPeak = true, rightFirstPeak = true;
int showPeaksPinSetting, prevShowPeaksPinSetting;

int stripPulseMiddle = 0;
int halfLeftValue, halfRightValue, halfPrevLeftValue, halfPrevRightValue;

int leftPeakBouncing = false, rightPeakBouncing = false;
int leftPeakBounce = 0, rightPeakBounce = 0;
int prevLeftPeakBounce = 0, prevRightPeakBounce = 0;
int leftPeakBounceCounter = 0, rightPeakBounceCounter = 0;
int leftPeakBounceDelayCounter = 0, rightPeakBounceDelayCounter = 0;
int leftBouncingPeaksNumOfLeds = 0, rightBouncingPeaksNumOfLeds = 0;
float bounceFactor;

int colorScheme11SpinValue = 0, colorScheme11SpinDelayValue = 0;
int colorSchemeFactor = 1;
long selectButton1Timer;

int spinDelayCounter = 0, spinCounter = 0, spinTurnsCounter = 0, spinTurnsMax = 0, spinTurnsDelay = 0, spinTurnsDelayMax = 0;
int spinCounterInc = 1;
int spinDelay = 0;
//
// initialize the strip or rings
//

Adafruit_NeoPixel left_strip = Adafruit_NeoPixel(stripNumOfLeds, leftStripPin, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel right_strip = Adafruit_NeoPixel(stripNumOfLeds, rightStripPin, NEO_GRB + NEO_KHZ800);

//
// setup
//

void setup() {
  #ifdef DEBUG
    Serial.begin(9600);
  #endif

  randomSeed(analogRead(2));

  if (stripsOn2Pins) {
    numOfSegments = stripNumOfLeds;
    maxDisplaySegments = numOfSegments - 1;
    
    stripMiddle = stripNumOfLeds;
    stripPulseMiddle = stripMiddle / 2;
    spinCircle = false;
  }
  else {
    numOfSegments = stripNumOfLeds / 2;
    stripMiddle = stripNumOfLeds / 2;
    maxDisplaySegments = stripMiddle - 1;

    stripPulseMiddle = stripMiddle / 2;
  }

  halfNumOfSegments = numOfSegments / 2; 
  bounceFactor = (float) bouncingPeaksNumOfLeds / (maxDisplaySegments - bouncingPeaksNumOfLeds);
  nonLinearResponseFactor = 90 / (float) maxDisplaySegments;
  log10MaxDisplaySegments = log10(maxDisplaySegments);

  pinMode(showPeaksPin, INPUT);    
  
  if (useSelectButton1)
    pinMode(selectButton1Pin, INPUT);  

  left_strip.begin();
  if (stripsOn2Pins) 
    right_strip.begin();

  if (useSensorValues) {
    readSensorValues();
    setInitialDisplayPeaks();
  }
  else {
    setStripColors();
    setSensitivityFactor();
  }

  #ifdef DEBUG_TEST_LEDS
    displayTest();
  #endif

  startupAnimation();
}

//
// main loop
//

void loop() {
  #ifdef DEBUG_PRINT_LOOP_TIME
    long time = millis();
  #endif


  if (useSensorValues) 
    readSensorValues();
  
  readValues();

  #if defined (DEBUG_NO_PEAKS)
    displayPeaks = false;
  #endif

  #if defined (DEBUG_PEAKS)
    displayPeaks = true;
  #endif

  if (pulsing) {
    drawPulsingValues();
  }
  else {
    drawValues();
    if (displayPeaks) {
      getPeaks();
      drawPeaks();
    }
  }

  left_strip.show();
  if (stripsOn2Pins)
    right_strip.show();
    
  storePrevValues();

  checkSpinCircle();

  #ifdef DEBUG_PRINT_LOOP_TIME
    time = millis() - time;
    Serial.println(time);
  #endif
}

// 
// functions
//

void setInitialDisplayPeaks() {
  #if !defined (DEBUG_NO_PEAK_SWITCH)
    showPeaksPinSetting = digitalRead(showPeaksPin);
  
    if (showPeaksPinSetting == HIGH)
      displayPeaks = false;
  #endif 
 
  if (reverseShowPeaks) {
    if (!displayPeaks)
      displayPeaks = true;
    else
      displayPeaks = false;
  }
  
  prevShowPeaksPinSetting = showPeaksPinSetting;
}

void readSensorValues() {
  //
  // peaks pin
  //

  #if !defined (DEBUG_NO_PEAK_SWITCH)
    showPeaksPinSetting = digitalRead(showPeaksPin);
  
    if (showPeaksMomentarySwitch) {
      if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH) {
        if (displayPeaks == true) {
          displayPeaks = false;
          clearLeftPeak();
          clearRightPeak();        
          if (showPeaksMomentarySwitch)
            while (digitalRead(showPeaksPin) == LOW) {}
        }
        else {
          displayPeaks = true;
        }
      }
    } 
    else {
      if (reverseShowPeaks) {
        if (showPeaksPinSetting == HIGH && prevShowPeaksPinSetting == LOW) 
          displayPeaks = true;
        else if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH) {
          displayPeaks = false;
          clearLeftPeak();
          clearRightPeak();        
        }
      }
      else {    
        if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH) 
          displayPeaks = true;
        else if (showPeaksPinSetting == HIGH && prevShowPeaksPinSetting == LOW) {
          displayPeaks = false;
          clearLeftPeak();
          clearRightPeak();        
        }
      }
    }
    if (pulsing) {
      if (displayPeaks)
        displayTopAsPeak = true;
      else
        displayTopAsPeak = false;
    }

    prevShowPeaksPinSetting = showPeaksPinSetting;
  #endif
  

  //
  // selectButtonPin 1 and 2
  //
  if (useSelectButton1) {      
    selectButton1PinState = digitalRead(selectButton1Pin);
    
    if (selectButton1PinState == HIGH && prevSelectButton1PinState == LOW)
      selectButton1Timer = millis();
      
    if (selectButton1PinState == HIGH && prevSelectButton1PinState == HIGH) {
      if ((millis() - selectButton1Timer) > 1000) {
        pulsing = !pulsing;
        setStripColors();
        displayNumber(colorScheme, 250);

        while (digitalRead(selectButton1Pin) == HIGH) {}
        selectButton1PinState = LOW;
        clearValues();
      }
    }
    else if (selectButton1PinState == LOW && prevSelectButton1PinState == HIGH) {
      selectButton1PinSetting++;
      if (selectButton1PinSetting > maxColorScheme) {
        selectButton1PinSetting = 0;
      }
      colorScheme = selectButton1PinSetting;

      if (colorScheme == 12)
        colorScheme11SpinValue = (colorScheme11SpinValue * colorScheme12Factor);

      setStripColors();
      displayNumber(colorScheme, 250);
    }
    prevSelectButton1PinState = selectButton1PinState;
  }

  if (useSelectButton2) {
    selectButton2PinState = digitalRead(selectButton2Pin);
    
    if (selectButton2PinState == HIGH && prevSelectButton2PinState == LOW) {
      selectButton2PinSetting++;
      
      switch(selectButton2PinSetting) {
        case 0:
        case 3: {   
          pulsing = false;
          spinCircle = false;
          selectButton2PinSetting = 0;
          break;
        }
        case 1: {
          pulsing = true;
          spinCircle= false;
          break;
        }
        case 2: {
          pulsing = true;
          spinCircle = true;
          break;
        }
      }
      
      setStripColors();
      displayNumber(colorScheme, 250);
    }
    
    prevSelectButton2PinState = selectButton2PinState;
  }
  
  //
  // brightness
  //
  brightnessValue = analogRead(brightnessPin);
  brightnessValue = map(brightnessValue, 0, 1023, 0, 255);
  
  if (abs(brightnessValue - prevBrightnessValue) > sensorDeviationBrightness) {
    ledBrightness = brightnessValue;
    setStripColors();
    prevBrightnessValue = brightnessValue;
  }

  //
  // colorscheme 11 spinning wheel
  //

  if (colorScheme == 11 || colorScheme == 12) {
    colorScheme11SpinDelayValue++;
    if (colorScheme11SpinDelayValue == colorScheme11SpinDelay) {
      colorScheme11SpinDelayValue = 0;
      colorScheme11SpinValue++;
      if (colorScheme11SpinValue > maxDisplaySegments * colorSchemeFactor)
        colorScheme11SpinValue = 0;
      setStripColors();
    }
  }

  //
  // sensitivity
  //
  sensitivityValue = analogRead(sensitivityPin);
  sensitivityValue = map(sensitivityValue, 0, 1023, 0, 255);
  setSensitivityFactor();
}

void setSensitivityFactor() {
  //sensitivityValue_div_numOfSegments = sensitivityValue / numOfSegments;
  sensitivityFactor = ((float) sensitivityValue / 255 * (float) maxSensitivity / 255);
}

void readValues() {
  #ifdef averageReadings
    leftAnalogValue = 0;
    rightAnalogValue = 0;
    
    for (i = 0; i <= averageNumOfReadings; i++) {
      leftAnalogValue += analogRead(leftPin);
      rightAnalogValue += analogRead(rightPin);
    }

    leftAnalogValue /= averageNumOfReadings;
    rightAnalogValue /= averageNumOfReadings;
    
  #else  
    leftAnalogValue = analogRead(leftPin);
    rightAnalogValue = analogRead(rightPin);
  #endif

  if (swapLeftRight) {
    int tempValue = leftAnalogValue;
    leftAnalogValue = rightAnalogValue;
    rightAnalogValue = tempValue;
  }

  if (leftAnalogValue < prevLeftAnalogValue) {
    leftDropTime++;
    if (leftDropTime > dropDelay) {
      leftAnalogValue = prevLeftAnalogValue * dropFactor;
      leftDropTime = 0;
    }
    else
      leftAnalogValue = prevLeftAnalogValue;
  }
   
  if (rightAnalogValue < prevRightAnalogValue) {
    rightDropTime++;
    if (rightDropTime > dropDelay) {
      rightAnalogValue = prevRightAnalogValue * dropFactor;
      rightDropTime = 0;
    }
    else
      rightAnalogValue = prevRightAnalogValue;
  }

  #ifdef DEBUG_PRINT_ANALOGVALUES
    Serial.print(leftAnalogValue);
    Serial.print(" ");
    Serial.println(rightAnalogValue);
  #endif  

  // map values  
  leftValue = map(leftAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);
  rightValue = map(rightAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);
  
  // if defined, convert to (reverse) non linear response
  boolean flagNonLinear = false;
  
  #if defined (nonLinearSinAudio)
    flagNonLinear = true;
    leftValueN = ((sin(((leftValue * nonLinearResponseFactor) + 270) * 0.0174533) + 1) * maxDisplaySegments);
    rightValueN = ((sin(((rightValue * nonLinearResponseFactor) + 270) * 0.0174533) + 1) * maxDisplaySegments);
    
  #elif defined (nonLinearReverseSinAudio)
    flagNonLinear = true;
    leftValueN = ((sin(((leftValue * nonLinearResponseFactor)) * 0.0174533)) * maxDisplaySegments);
    rightValueN = ((sin(((rightValue * nonLinearResponseFactor)) * 0.0174533)) * maxDisplaySegments);

  #elif defined (nonLinearLogAudio)
    flagNonLinear = true;
    leftValueN = ((log10(leftValue  + 1) / log10MaxDisplaySegments * maxDisplaySegments));
    rightValueN = ((log10(rightValue  + 1) / log10MaxDisplaySegments * maxDisplaySegments));
  
  #endif
  
  if (flagNonLinear == true) {
    #if defined (nonLinearAvr2)
      leftValue = (leftValue + leftValueN) / 2;
      rightValue = (rightValue + rightValueN) / 2;
    #else
      leftValue = leftValueN;
      rightValue = rightValueN;
    #endif
  }
  
// @EB_DEBUG

  #ifdef displayOverflow
    #ifdef compressOverflowPeaks
      for (i = 1; i <= compressOverflowNumOfTimes; i++) {
        if (leftValue > maxDisplaySegments) {
//          Serial.print(i);    
//          Serial.print("  ");
//          Serial.print(leftValue);    
//          Serial.print("  ");
          leftValue = leftValue - leftValue * compressOverflowFactor * i;
//          Serial.print(leftValue);
//          Serial.print("  ");
//          Serial.println(maxDisplaySegments);
        }
      }
    #endif
  #endif
  
  if (leftValue > maxDisplaySegments) {      
    leftValue = maxDisplaySegments;
    #ifdef displayOverflow
      drawOverflow();
    #endif
  }

  #ifdef displayOverflow
    #ifdef compressOverflowPeaks
      if (rightValue > maxDisplaySegments)
        rightValue = rightValue - rightValue * compressOverflowFactor;
    #endif
  #endif
  
  if (rightValue > maxDisplaySegments) {
    rightValue = maxDisplaySegments;
    #ifdef displayOverflow
      drawOverflow();
    #endif
  }
}

void storePrevValues() {
  prevLeftAnalogValue = leftAnalogValue;
  prevRightAnalogValue = rightAnalogValue;

  prevLeftValue = leftValue;
  prevRightValue = rightValue;
}

void getPeaks() {
  if (leftValue > leftPeak) {
    if (dynamicBouncingPeaks || prevLeftPeakBounce > 0)
      clearLeftBouncePeak();
          
    leftPeak = leftValue;
    leftPeakTime = 0;
    leftFirstPeak = true;

    if (bouncingPeaks) {
      leftPeakBouncing = true;
      leftPeakBounceCounter = 0;
      leftPeakBounceDelayCounter = 0;
      
      if (dynamicBouncingPeaks)
        leftBouncingPeaksNumOfLeds = max(bouncingPeaksNumOfLedsMin, (leftPeak * bounceFactor));
      else
        leftBouncingPeaksNumOfLeds = bouncingPeaksNumOfLeds;
    }
  }
  else {
    leftPeakTime++;
    if (droppingPeak) {
      if (leftFirstPeak) {
        if (leftPeakTime > peakTimeFirstDropDelay) {
          clearLeftPeak();
          leftFirstPeak = false;
        }
      }
      else {
        if (leftPeakTime > peakTimeDropDelay) {
          clearLeftPeak();
        }
      }
    }
    else {
      if (leftPeakTime > peakTimeNoDropDelay) {
        clearLeftPeak();
      }
    }
  }

  if (leftPeakBouncing) {
    if (leftFirstPeak) {
      leftPeakBounceDelayCounter++;
      if (leftPeakBounceDelayCounter >= bouncingPeakDelay) {
        leftPeakBounceDelayCounter = 0;
        leftPeakBounceCounter += bouncingPeakCounterInc;
        if (leftPeakBounceCounter >= 180) {
          clearLeftBouncePeak();
          clearLeftBounce();
        }
        else {        
          leftPeakBounce = min((sin(leftPeakBounceCounter * 0.0174533) * leftBouncingPeaksNumOfLeds), (maxDisplaySegments - leftPeak));
          if (leftPeakBounce != prevLeftPeakBounce) {
            clearLeftBouncePeak();
          }
          prevLeftPeakBounce = leftPeakBounce;
        }
      }
    }
  }

  if (rightValue > rightPeak) {
    if (dynamicBouncingPeaks || prevRightPeakBounce > 0)
      clearRightBouncePeak();

    rightPeak = rightValue;
    rightPeakTime = 0;
    rightFirstPeak = true;

    if (bouncingPeaks) {
      rightPeakBouncing = true;
      rightPeakBounceCounter = 0;
      rightPeakBounceDelayCounter = 0;

      if (dynamicBouncingPeaks)
        rightBouncingPeaksNumOfLeds = max(bouncingPeaksNumOfLedsMin, (rightPeak * bounceFactor));
      else
        rightBouncingPeaksNumOfLeds = bouncingPeaksNumOfLeds;
    }
  }
  else {
    rightPeakTime++;
    if (droppingPeak) {
      if (rightFirstPeak) {
        if (rightPeakTime > peakTimeFirstDropDelay) {
          clearRightPeak();
          rightFirstPeak = false;
        }
      }
      else {
        if (rightPeakTime > peakTimeDropDelay)
          clearRightPeak();
      }
    }
    else {
      if (rightPeakTime > peakTimeNoDropDelay)
        clearRightPeak();
    }
  }

  if (rightPeakBouncing) {
    if (rightFirstPeak) {
      rightPeakBounceDelayCounter++;
      if (rightPeakBounceDelayCounter >= bouncingPeakDelay) {
        rightPeakBounceDelayCounter = 0;
        rightPeakBounceCounter += bouncingPeakCounterInc;
  
        if (rightPeakBounceCounter >= 180) {
          clearRightBouncePeak();
          clearRightBounce();
        }
        else {        
          rightPeakBounce = min((sin(rightPeakBounceCounter * 0.0174533) * rightBouncingPeaksNumOfLeds), (maxDisplaySegments - rightPeak));
          if (rightPeakBounce != prevRightPeakBounce) {
            clearRightBouncePeak();
          }
          prevRightPeakBounce = rightPeakBounce;
        }
      }
    }
  }
}

void checkSpinCircle () {
  if (spinCircle) {
    if (spinTurnsMax == 0) {
      spinTurnsMax = random(stripNumOfLeds / 4, stripNumOfLeds * 3);  // spin at least a quarter turn, max 3 turns
      
      if (random(10) > 4)
        spinCounterInc = -spinCounterInc;
      
      spinTurnsDelayMax = random(100, 1000); // @EB_DEBUG

      spinDelay = random(20, 75); // @EB_DEBUG
    }

    if (spinTurnsCounter == spinTurnsMax) {
      spinTurnsDelay++;
      if (spinTurnsDelay == spinTurnsDelayMax) {
        spinTurnsDelay = 0;
        spinTurnsCounter = 0;
        spinTurnsMax = 0;
      }
    }
    else {
      spinDelayCounter++;
  
      if (spinDelayCounter > spinDelay) {
        clearZeroAndPeaks();

        spinCounter += spinCounterInc;
        if (spinCounter > stripNumOfLeds)
          spinCounter = 0;
        else if (spinCounter < 0)
          spinCounter = stripNumOfLeds;

        spinTurnsCounter++;
        spinDelayCounter = 0;
      }
    }
  }
}

int getSpinCircleValue(int value) {
  if (!spinCircle)
   return value;
  else {
    int calcValue = value + spinCounter;
    if (calcValue >= stripNumOfLeds)
      calcValue -= stripNumOfLeds;
    return calcValue;
  }
}

void drawValues() {
  if (splitStrip) {
    for (i = middleOffset; i < leftValue; i++)
      left_strip.setPixelColor(getSpinCircleValue(i), stripColor[i]);

    if (!displayPeaks && displayTopAsPeak)
      left_strip.setPixelColor(getSpinCircleValue(leftValue), stripHoldColor);

    for (i = prevLeftValue; i >= leftValue; i--)
      left_strip.setPixelColor(getSpinCircleValue(i), 0);

    if (stripsOn2Pins) {
      for (i = middleOffset; i < rightValue; i++) 
        right_strip.setPixelColor(i, stripColor[i]);

      if (!displayPeaks && displayTopAsPeak)
        right_strip.setPixelColor(rightValue, stripHoldColor);

      for (i = prevRightValue; i >= rightValue; i--)
        right_strip.setPixelColor(i, 0);
    }
    else {
      for (i = middleOffset; i < rightValue; i++)
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripColor[i]);

      if (!displayPeaks && displayTopAsPeak)
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightValue), stripHoldColor);
        
      for (i = prevRightValue; i >= rightValue; i--)
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);
    }
  }
  else {
    for (i = middleOffset; i < leftValue; i++)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripColor[i]);

    if (!displayPeaks && displayTopAsPeak)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + leftValue), stripHoldColor);

    for (i = prevLeftValue; i >= leftValue; i--)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);
  
    for (i = middleOffset; i < rightValue; i++)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), stripColor[i]);

    if (!displayPeaks && displayTopAsPeak)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - rightValue), stripHoldColor);

    for (i = prevRightValue; i >= rightValue; i--)
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), 0);
  }

  if (displayMiddleLed) 
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle), stripMiddleColor);
}

void drawPulsingValues() {
  halfLeftValue = (leftValue + 1) / 2;
  halfRightValue = (rightValue + 1) / 2;
  halfPrevLeftValue = (prevLeftValue + 1)/ 2;
  halfPrevRightValue = (prevRightValue + 1) / 2;
  
  if (splitStrip) {
    for (i = 0; i < halfLeftValue; i++) {
      colorValue = stripColor[i * 2];
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + i), colorValue);
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - i), colorValue);
    }

    if (displayTopAsPeak) {
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfLeftValue), stripHoldColor);
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfLeftValue), stripHoldColor);
    }

    for (i = halfPrevLeftValue; i >= halfLeftValue; i--) {
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + i), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - i), 0);
    }

    if (stripsOn2Pins) {
      for (i = 0; i < halfRightValue; i++) {
        colorValue = stripColor[i * 2];
        right_strip.setPixelColor((stripPulseMiddle + i), colorValue);
        right_strip.setPixelColor((stripPulseMiddle - i), colorValue);
      }

      if (displayTopAsPeak) {
        right_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfRightValue), stripHoldColor);
        right_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfRightValue), stripHoldColor);
      }
      
      for (i = halfPrevRightValue; i >= halfRightValue; i--) {
        right_strip.setPixelColor((stripPulseMiddle + i), 0);
        right_strip.setPixelColor((stripPulseMiddle - i), 0);
      }
    }
    else {
      for (i = 0; i < halfRightValue; i++) {
        colorValue = colorValue = stripColor[i * 2];
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), colorValue);
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), colorValue);
      }

      if (displayTopAsPeak) {
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfRightValue), stripHoldColor);
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfRightValue), stripHoldColor);
      }

      for (i = halfPrevRightValue; i >= halfRightValue; i--) {
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), 0);
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), 0);
      }
    }
  }
  else {
    for (i = 0; i < halfLeftValue; i++) {
      colorValue = colorValue = stripColor[i * 2];
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), colorValue);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), colorValue);
    }

    if (displayTopAsPeak) {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfLeftValue), stripHoldColor);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfLeftValue), stripHoldColor);
    }
    
    for (i = halfPrevLeftValue; i >= halfLeftValue; i--) {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), 0);
    }
  
    for (i = 0; i < halfRightValue; i++) {
      colorValue = colorValue = stripColor[i * 2];
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + i)), colorValue);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - i)), colorValue);
    }

    if (displayTopAsPeak) {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + halfRightValue)), stripHoldColor);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - halfRightValue)), stripHoldColor);
    }
    
    for (i = halfPrevRightValue; i >= halfRightValue; i--) {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + i)), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - i)), 0);
    }
  }

  if (displayMiddleLed) {
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle - stripPulseMiddle), stripMiddleColor);
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle), stripMiddleColor);
  }
}

void clearZeroAndPeaks() {
  left_strip.setPixelColor(getSpinCircleValue(middleOffset), 0);
  left_strip.setPixelColor(getSpinCircleValue(stripMiddle), 0);

  if (displayTopAsPeak) {
    if (splitStrip) {
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfLeftValue), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfLeftValue), 0);
      
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfRightValue), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfRightValue), 0);
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfLeftValue), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfLeftValue), 0);

      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + halfRightValue)), 0);
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - halfRightValue)), 0);
    }
  }
}

void drawPeaks() {  
  if (leftPeak > 0) {
    if (droppingPeakFade && leftPeakBouncing == false)
      stripHoldColor = left_strip.Color(max(1, (255 * leftPeak * ledFactor_div_numOfSegments)), 0, 0);
    else
      stripHoldColor = stripColor[numOfSegments];

    if (splitStrip)
      left_strip.setPixelColor(getSpinCircleValue(leftPeak + leftPeakBounce), stripHoldColor);
    else
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + leftPeakBounce)), stripHoldColor);
  } 
  
  if (rightPeak > 0) {
    if (droppingPeakFade && rightPeakBouncing == false)
      stripHoldColor = left_strip.Color(max(1, (255 * rightPeak * ledFactor_div_numOfSegments)), 0, 0);    
    else
      stripHoldColor = stripColor[numOfSegments];

    if (splitStrip) {
      if (stripsOn2Pins) {
        right_strip.setPixelColor(getSpinCircleValue(rightPeak + rightPeakBounce), stripHoldColor);
      }
      else {
        left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightPeak + rightPeakBounce), stripHoldColor);
      }
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + rightPeakBounce)), stripHoldColor);
    }
  }

  //if (leftPeak > 0 || rightPeak > 0)
  //  left_strip.show();    
}

void clearLeftPeak() {  
  if (splitStrip)
    left_strip.setPixelColor(getSpinCircleValue(leftPeak + prevLeftPeakBounce), 0);
  else
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + prevLeftPeakBounce)), 0);

  if (droppingPeak)
    leftPeak = leftPeak * peakDropFactor;
  else
    leftPeak = 0;
  leftPeakTime = 0;
}

void clearRightPeak() {
  if (splitStrip) {
    if( stripsOn2Pins) {
      right_strip.setPixelColor(getSpinCircleValue(rightPeak + prevRightPeakBounce), 0);
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightPeak + prevRightPeakBounce), 0);
    }
  }
  else {
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + prevRightPeakBounce)), 0);
  }
  
  if (droppingPeak) 
    rightPeak = rightPeak * peakDropFactor;
  else
    rightPeak = 0;
  rightPeakTime = 0;
}

void clearLeftBouncePeak() {
  if (splitStrip)
    left_strip.setPixelColor(getSpinCircleValue(leftPeak + prevLeftPeakBounce), 0);
  else
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + prevLeftPeakBounce)), 0);
}

void clearRightBouncePeak() {
  if (splitStrip) {
    if (stripsOn2Pins) {
      right_strip.setPixelColor(getSpinCircleValue(rightPeak + prevRightPeakBounce), 0);
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue((stripMiddle + rightPeak + prevRightPeakBounce)), 0);
    }
  }
  else {
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + prevRightPeakBounce)), 0);
  }
}

void clearLeftBounce() {
  leftPeakBouncing = false;
  leftPeakBounceCounter = 0;
  leftPeakBounce = 0;
  prevLeftPeakBounce = 0;
  leftBouncingPeaksNumOfLeds = 0;
}

void clearRightBounce() {
  rightPeakBouncing = false;
  rightPeakBounceCounter = 0;
  rightPeakBounce = 0;
  prevRightPeakBounce = 0;
  leftBouncingPeaksNumOfLeds = 0;
}

void clearValues() {
  leftAnalogValue = 0;
  rightAnalogValue = 0;
  prevLeftAnalogValue = 0;
  prevRightAnalogValue = 0;
  leftPeak = 0;
  rightPeak = 0;
}


void drawOverflow() {
  for (i = 0; i <= numOfSegments; i++) {
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), stripOverflowColor);
    if (stripsOn2Pins) {
      right_strip.setPixelColor(i, stripOverflowColor);
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripOverflowColor);
    }
  }
  left_strip.show();
  if (stripsOn2Pins)
    right_strip.show();
  
  delay(overflowDelay);

  for (i = 0; i <= numOfSegments; i++) {
    left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), 0);
    if (stripsOn2Pins) {
      right_strip.setPixelColor(i, 0);
    }
    else {
      left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);
    }
  }
  left_strip.show();
  if (stripsOn2Pins)
    right_strip.show();
}

void setStripColors() {
  int r, g, b;
  int p1, p2;

  ledFactor = (float) ledBrightness / 255;
  ledFactor_div_numOfSegments = (float) ledFactor / (float) numOfSegments;
  stripMiddleColor = left_strip.Color(0, 0, 255 * ledFactor);
  
  switch (colorScheme) {
    case 0: {      
      int orangeLimit;
      float orangeFactor = orangeLimitAmount / halfNumOfSegments;
    
      for (i = 0; i <= numOfSegments; i++) {
        if (i <= halfNumOfSegments)
          orangeLimit = (i * orangeFactor);
        else
          orangeLimit = ((numOfSegments - i) * orangeFactor);
    
        stripColor[i] = left_strip.Color((255 * i * ledFactor_div_numOfSegments), ((255 - orangeLimit) * (numOfSegments - i) * ledFactor_div_numOfSegments), 0); 
      }
      break;
    }

    case 1: {
      for (i = 0; i <= numOfSegments; i++) {
        stripColor[i] = left_strip.Color(0, (255 * i * ledFactor_div_numOfSegments), (255 * (numOfSegments - i) * ledFactor_div_numOfSegments)); 
      }
      break;
    }

    case 2: {
      for (i = 0; i <= numOfSegments; i++) {
        stripColor[i] = left_strip.Color((255 * i * ledFactor_div_numOfSegments), 0, (255 * (numOfSegments - i) * ledFactor_div_numOfSegments)); 
      }
      break;
    }

    case 3: {
      for (i = 0; i <= numOfSegments; i++) {
        stripColor[i] = left_strip.Color((255 * (numOfSegments - i) * ledFactor_div_numOfSegments), 0, (255 * i * ledFactor_div_numOfSegments)); 
      }
      break;
    }

    case 4: {
      for (i = 0; i <= numOfSegments; i++) {
        stripColor[i] = left_strip.Color(0, (255 * (numOfSegments - i) * ledFactor_div_numOfSegments), (255 * i * ledFactor_div_numOfSegments)); 
      }
      break;
    }

    case 5: {
      for (i = 0; i <= numOfSegments; i++) {
        stripColor[i] = left_strip.Color((255 * (numOfSegments - i) * ledFactor_div_numOfSegments), (255 * i * ledFactor_div_numOfSegments), 0); 
      }
      break;
    }

    case 6: {
      for (i = 0; i <= numOfSegments; i++) {
        r = (255 * i * ledFactor_div_numOfSegments);
        g = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);
        b = (200 * (numOfSegments - i) * ledFactor_div_numOfSegments); 
        stripColor[i] = left_strip.Color(r, g, b); 
      }
      break;
    }

    case 7: {
      for (i = 0; i <= numOfSegments; i++) {
        b = (255 * i * ledFactor_div_numOfSegments);
        g = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);
        r = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments); 
        stripColor[i] = left_strip.Color(r, g, b); 
      }
      break;
    }

    case 8: {
      for (i = 0; i <= numOfSegments; i++) {
        r = (255 * i * ledFactor_div_numOfSegments);
        b = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);
        g = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments); 
        stripColor[i] = left_strip.Color(r, g, b); 
      }
      break;
    }

    case 9: {
      for (i = 0; i <= numOfSegments; i++) {
        b = (255 * i * ledFactor_div_numOfSegments);
        r = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);
        g = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments); 
        stripColor[i] = left_strip.Color(r, g, b); 
      }
      break;
    }

    case 10: 
      colorScheme11SpinValue = 0;
      
    case 11:     
    
    case 12: {
      p1 = (85 * numOfSegments / 255);
      p2 = (170 * numOfSegments / 255);
      int wheel;

      if (colorScheme == 12)
        colorSchemeFactor = colorScheme12Factor;        
      else
        colorSchemeFactor = 1;
            
      for (i = 0; i <= numOfSegments; i++) {  
        //wheel = int(float(i + colorScheme11SpinValue) / colorSchemeFactor) % numOfSegments;  // reverse wheel
        
        wheel = int(float(i - colorScheme11SpinValue) / colorSchemeFactor + numOfSegments) % numOfSegments;

        if (wheel < p1) {          
          wheel = map(wheel, 0, p1, 0, 255);
          r = (wheel * ledFactor);
          g = ((255 - wheel) * ledFactor);
          b = 0;
        } 
        else if (wheel < p2) {
          wheel = map(wheel, p1, p2, 0, 255);
          r = ((255 - wheel) * ledFactor);
          g = 0;
          b = (wheel * ledFactor);
        } 
        else {
          wheel = map(wheel, p2, numOfSegments, 0, 255);
          r = 0;
          g = (wheel * ledFactor);
          b = ((255 - wheel) * ledFactor);
        }        

        stripColor[i] = left_strip.Color(r, g, b); 
      }
      break;
    }
  }

  if (colorScheme >= 10)
    stripHoldColor = left_strip.Color(255 * ledFactor, 0, 0); // set to red for the color wheels
  else
    stripHoldColor = stripColor[numOfSegments];
    
  stripOverflowColor = stripHoldColor;   // left_strip.Color(min(255, 255 * ledFactor * 1.5), 0, 0);
}

void startupAnimation() {  
  for (j = 0; j < 2; j++) {
    for (i = 0; i <= numOfSegments; i++) {
      if (animType == 1)
        left_strip.setPixelColor(stripMiddle - (numOfSegments - i), stripColor[i]);
      else
        left_strip.setPixelColor(stripMiddle - i, stripColor[i]);
      
      if (stripsOn2Pins)
        right_strip.setPixelColor(i, stripColor[i]);
      else
        left_strip.setPixelColor(stripMiddle + i, stripColor[i]);

      left_strip.show();
      if (stripsOn2Pins)
        right_strip.show();  
      
      delay(startupAnimationDelay);
    }
    
    for (i = 0; i <= numOfSegments; i++) {
      if (animType == 1)
        left_strip.setPixelColor(stripMiddle - (numOfSegments - i), 0);
      else
        left_strip.setPixelColor(stripMiddle - i, 0);
        
      if (stripsOn2Pins)
        right_strip.setPixelColor(i, 0);
      else
        left_strip.setPixelColor(stripMiddle + i, 0);

      left_strip.show();
      if (stripsOn2Pins)
        right_strip.show();  
      
      delay(startupAnimationDelay);
    }
  }
}

void displayNumber (int number, int displayDelay) {
  left_strip.clear();
  if (stripsOn2Pins)
    right_strip.clear();

  number++; // @EB_DEBUG : display value 0 at led 1
  
  for (i = 0; i <= number; i++) {
    if (i % 5 == 0) 
      colorValue = stripMiddleColor;
    else
      colorValue = stripColor[0];

    left_strip.setPixelColor(middleOffset + i, colorValue);

    if (stripsOn2Pins)
      right_strip.setPixelColor(middleOffset + i, colorValue);
    else
      left_strip.setPixelColor(stripMiddle + middleOffset + i, colorValue);

    delay(45 - number * 3); // @EB_DEBUG
    
    left_strip.show();
    if (stripsOn2Pins)
      right_strip.show();  
  }

  if (pulsing) {
    left_strip.setPixelColor(middleOffset + maxDisplaySegments, stripMiddleColor);

    if (stripsOn2Pins)
      right_strip.setPixelColor(maxDisplaySegments, stripMiddleColor);
    else
      left_strip.setPixelColor(stripMiddle + maxDisplaySegments, stripMiddleColor);

    left_strip.show();
    if (stripsOn2Pins)
      right_strip.show();  
  }

  delay(displayDelay);

  left_strip.clear();
  if (stripsOn2Pins)
    right_strip.clear();
}


//
// for debugging
//

#ifdef DEBUG_TEST_LEDS
  void displayTest() {
    for (i = 0; i <= numOfSegments; i++) {
      left_strip.setPixelColor(stripMiddle - i, stripColor[i]);

      if (stripsOn2Pins)
        right_strip.setPixelColor(i, stripColor[i]);
      else
        left_strip.setPixelColor(stripMiddle + i, stripColor[i]);

      left_strip.show();
      if (stripsOn2Pins)
        right_strip.show();  

      delay(50);
    }
    delay(5000);
  
    for (i = 0; i <= numOfSegments; i++) {
      left_strip.setPixelColor(stripMiddle - i, 0);

      if (stripsOn2Pins)
        right_strip.setPixelColor(i, 0);
      else
        left_strip.setPixelColor(stripMiddle + i, 0);

      left_strip.show();
      if (stripsOn2Pins)
        right_strip.show();  
    }
  }
  
  void serialDisplayRGB(int r, int g, int b) {
    Serial.print(i);
    Serial.print(" ");
    Serial.print(r);
    Serial.print(" ");
    Serial.print(g);
    Serial.print(" ");
    Serial.println(b);
  }
#endif

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**********************************************************************

* Stereo VU Meter for 1 or 2 LED rings or strips build by ericBcreator

* Designed to be used with an Arduino UNO, Nano or compatible device.

**********************************************************************

* Notice: search for @EB in the Sketch for important variables to set

* for the Sketch to work with your setup.

**********************************************************************

* Last updated 20180202 by ericBcreator

* This code is free for personal use, not for commercial purposes.

* Please leave this header intact.

* contact: ericBcreator@gmail.com

**********************************************************************

// include the NeoPixel library:

#include <Adafruit_NeoPixel.h>

// debugging settings

//#define DEBUG // debug: enable serial.print

//#define DEBUG_NO_PEAK_SWITCH // debug: no peak switch connected @EB

//#define DEBUG_TEST_LEDS // debug: display each led (color) slowly at startup

//#define DEBUG_PRINT_LOOP_TIME // debug: serial.print the looptime in ms

//#define DEBUG_PRINT_ANALOGVALUES // debug: serial.print analog input values

//#define DEBUG_NO_PEAKS // debug: display no peaks, ignoring other settings

//#define DEBUG_PEAKS // debug: display peaks, ignoring other settings

// uncomment to average the input levels to the number defined by averageNumOfReadings. increasing the value will make the script less responsive

//#define averageReadings // average input levels or not

//#define averageNumOfReadings 3 // num of readings for averaging

// uncomment to map the linear audio input to non-linear response

//#define nonLinearSinAudio // uncomment to map the linear audio input signal to a non-linear, reverse audio-taper response (sin wave)

//#define nonLinearReverseSinAudio // uncomment to map the linear audio input signal to a non-linear, audio-taper response (reverse sin wave)

#define nonLinearLogAudio // uncomment to map the linear audio input signal to a log response

//#define nonLinearAvr2 // uncomment to average the original input with the non-linear response

// overflow settings

//#define displayOverflow // display overflow or not

//#define compressOverflowPeaks // compress overflow peaks or not

//#define compressOverflowNumOfTimes 2 // num of times to apply the compressOverflowFactor

//float compressOverflowFactor = .05; // factor for compression

// uncomment when using high level (non-consumer) inputs

//#define highLevelInput // @EB define for high level inputs

// uncomment the definition for the connected strip or ring(s) @EB

//#define led_matrix_40

//#define led_ring_60

//#define led_ring_60_ps

#define led_rhombus_160_ps

//#define led_strip_60

//#define led_strip_60_qr

//#define led_strip_30

//#define led_2_rings_24

//#define led_2_rings_30

//#define led_strip_200

//#define led_strip_144

//#define led_2_strip_63

//#define led_2_strip_63_qr

// important setting: using potentiometer sensor values or not

// This setting has to be set right or the script will not work correctly:

// - set to true if using potentiometers

// - set to false if not using potentiometers

const int useSensorValues = true; // @EB

// setup pins

int leftPin = A0, rightPin = A1; // left audio in on analog 0, right on analog 1

int brightnessPin = A4, sensitivityPin = A5; // potentiometers for brightness and sensitivity on analog 4 and 5

int leftStripPin = 5; // DIN of left led strip on digital pin 5

int rightStripPin = 6; // DIN of right led strip on digital pin 6

int showPeaksPin = 7; // switch to toggle peaks on or off on digital pin 7 (7, 9 for box version)

int showPeaksMomentarySwitch = false; // set false for an on/off toggle switch

int reverseShowPeaks = true; // reverses the on/off setting in case you made a wiring mistake ;-) @EB

int selectButton1Pin = 8; // push button for changing settings on digital pin 8

int useSelectButton1 = true; // set to false if no push button1 for selecting the color scheme is connected @EB

int selectButton2Pin = 9; // push button for changing settings on digital pin 9

int useSelectButton2 = true; // set to false if no push button2 is connected @EB

// setup variables for the number of leds and led strip or 2 rings

#if defined (led_matrix_40)

//settings for a 40 led matrix

int stripNumOfLeds = 40; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[21]; // half of the number of leds + 1

int displayMiddleLed = false; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = true; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 0; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 5; // hold time before dropping the leds

float dropFactor = .94; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 150; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 3; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 6; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_ring_60)

//settings for a 60 led ring

int stripNumOfLeds = 60; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = false; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = true; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 0; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 5; // hold time before dropping the leds

float dropFactor = .94; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 70; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 3; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_ring_60_ps)

//settings for a 60 led ring - pulsating and spinning settings

int stripNumOfLeds = 60; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = true; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 0; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 5; // hold time before dropping the leds

float dropFactor = .93; // value for dropping the leds

int peakTimeNoDropDelay = 10; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 10; // peak hold time when dropping the first peak

int peakTimeDropDelay = 6; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .92; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 3; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_rhombus_160_ps)

//settings for a 160 led rhombus - pulsating and spinning settings

int stripNumOfLeds = 160; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[81]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = true; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 0; // offset for the middle led when using one strip

int startupAnimationDelay = 0; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 4; // hold time before dropping the leds

float dropFactor = .92; // value for dropping the leds

int peakTimeNoDropDelay = 150; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 70; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 10; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 5; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 6; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60)

//settings for a 60 led strip

int stripNumOfLeds = 60; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = false; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 1; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 5; // hold time before dropping the leds

float dropFactor = .94; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 70; // peak hold time when dropping the first peak

int peakTimeDropDelay = 7; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 6; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 3; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 10; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_60_qr)

//settings for a 60 led strip - quick response

int stripNumOfLeds = 60; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[31]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = false; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 1; // offset for the middle led when using one strip

int startupAnimationDelay = 6; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 4; // hold time before dropping the leds

float dropFactor = .92; // value for dropping the leds

int peakTimeNoDropDelay = 0; // peak hold time when not dropping the peaks (when droppingPeak is false)

int peakTimeFirstDropDelay = 0; // peak hold time when dropping the first peak

int peakTimeDropDelay = 0; // peak hold time when dropping the rest of the peaks

float peakDropFactor = 1; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 0; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 0; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 0; // delay between peak bounce updates

int bouncingPeakCounterInc = 180; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_strip_30)

//settings for a 30 led strip

int stripNumOfLeds = 30; // the total number of leds

int stripsOn2Pins = false; // set to true if the LED strips or rings are connected to 2 input pins

uint32_t stripColor[16]; // half of the number of leds + 1

int displayMiddleLed = true; // display the middle led (blue). set to true for one strip, false for two strips or rings

int splitStrip = false; // set to true when using 2 strips or rings, false for one strip

int middleOffset = 1; // offset for the middle led when using one strip

int startupAnimationDelay = 10; // delay for the startup animation

int orangeLimitAmount = 0; // limit the amount of green of the middle LEDs to make them more orange

int swapLeftRight = false; // swap the left and right input values or not

int dropDelay = 10; // hold time before dropping the leds

float dropFactor = .9; // value for dropping the leds

int peakTimeNoDropDelay = 250; // peak hold time when not dropping the peaks (set droppingPeak true or false)

int peakTimeFirstDropDelay = 150; // peak hold time when dropping the first peak

int peakTimeDropDelay = 15; // peak hold time when dropping the rest of the peaks

float peakDropFactor = .94; // value for dropping the peaks

int droppingPeakFade = false; // display the dropping peak fading to black or not

int bouncingPeaksNumOfLeds = 4; // how many leds to bounce up (max)

int bouncingPeaksNumOfLedsMin = 2; // how many leds to bounce up (min) when using dynamicBouncingPeaks

int bouncingPeakDelay = 4; // delay between peak bounce updates

int bouncingPeakCounterInc = 9; // increase counter for each bounce update. note: it uses a 0-180 sin function for the bouncing

#elif defined (led_2_rings_24)

//settings for 2 24 led rings

int stripNumOfLeds = 48;

int stripsOn2Pins = false;

uint32_t stripColor[25];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 5;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 2;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 10;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 4;

int bouncingPeaksNumOfLedsMin = 2;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined(led_2_rings_30)

//settings for 2 30 led rings

int stripNumOfLeds = 60;

int stripsOn2Pins = false;

uint32_t stripColor[31];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 5;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 2;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 10;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 4;

int bouncingPeaksNumOfLedsMin = 2;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined (led_strip_200)

//settings for a 200 led strip

int stripNumOfLeds = 200;

int stripsOn2Pins = false;

uint32_t stripColor[101];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 10;

float dropFactor = .96;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 30;

float peakDropFactor = .99;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 8;

int bouncingPeaksNumOfLedsMin = 4;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 9;

#elif defined (led_strip_144)

//settings for a 144 led strip

int stripNumOfLeds = 145;

int stripsOn2Pins = false;

uint32_t stripColor[73];

int displayMiddleLed = true;

int splitStrip = false;

int middleOffset = 1;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 4;

float dropFactor = .92;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 100;

int peakTimeDropDelay = 5;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 10;

int bouncingPeaksNumOfLedsMin = 4;

int bouncingPeakDelay = 2;

int bouncingPeakCounterInc = 10;

#elif defined (led_2_strip_63)

//settings for 2 63 led strips

int stripNumOfLeds = 63;

int stripsOn2Pins = true;

uint32_t stripColor[64];

int displayMiddleLed = true;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 5;

float dropFactor = .94;

int peakTimeNoDropDelay = 250;

int peakTimeFirstDropDelay = 70;

int peakTimeDropDelay = 7;

float peakDropFactor = .94;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 12;

int bouncingPeaksNumOfLedsMin = 4;

int bouncingPeakDelay = 4;

int bouncingPeakCounterInc = 10;

#elif defined (led_2_strip_63_qr)

//settings for 2 63 led strips - quick response

int stripNumOfLeds = 63;

int stripsOn2Pins = true;

uint32_t stripColor[64];

int displayMiddleLed = false;

int splitStrip = true;

int middleOffset = 0;

int startupAnimationDelay = 1;

int orangeLimitAmount = 0;

int swapLeftRight = false;

int dropDelay = 4;

float dropFactor = .92;

int peakTimeNoDropDelay = 200;

int peakTimeFirstDropDelay = 60;

int peakTimeDropDelay = 6;

float peakDropFactor = .92;

int droppingPeakFade = false;

int bouncingPeaksNumOfLeds = 12;

int bouncingPeaksNumOfLedsMin = 4;

int bouncingPeakDelay = 3;

int bouncingPeakCounterInc = 10;

#endif

// setup other user variables

// basic settings

int pulsing = true; // pulsing will display from the middle of each strip or ring @EB

int spinCircle = true; // spin the animation. will not work with stripsOn2Pins @EB

int animType = 0; // startup animation selection (1 looks nice for 1 ring) @EB

int colorScheme = 10; // 0: green-red, 1: blue-green, 2: blue-red, 3: red-blue, 4: green-blue, 5: red-green, 6: blue-white-red

// 7: red-white-blue, 8: green-white-red, 9: green-white-blue, 10: color wheel, 11: spinning color wheel,

// 12: as 11 but spread with factor colorScheme12Factor @EB

int maxColorScheme = 12; // used for looping through the color schemes with the switch button

int colorScheme11SpinDelay = stripNumOfLeds / 4 ; // delay for spinning scheme 11

int colorScheme12Factor = 3; // wheel spread factor for scheme 12 @EB

int minValue = 10; // min analog input value

int sensitivityValue = 110; // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)

#ifdef highLevelInput

int maxValue = 700; // max analog input value (0-1023 equals 0-5V). try 300 for low level input, 700 for high

int maxSensitivity = 2 * 255; // set to a higher setting to amplify low input levels. try 4 * 255 for low level input, 2 * 255 for high

#else

int maxValue = 300; // max analog input value (0-1023 equals 0-5V). try 300 for low level input, 700 for high

int maxSensitivity = 4 * 255; // set to a higher setting to amplify low input levels. try 4 * 255 for low level input, 2 * 255 for high

#endif

int ledBrightness = 30; // 0 - 255, initial value (value read from the potentiometer if useSensorValues = true)

int sensorDeviationBrightness = 3; // eliminate fluctuating values

int overflowDelay = 10; // overflow hold time

// peak settings @EB

int displayPeaks = false; // value will be set by the switch if useSensorValues = true

int displayTopAsPeak = true; // always display the top LED in peak color

int droppingPeak = true; // display dropping peaks or not. note: displayPeaks has to be true

int bouncingPeaks = false; // display bouncing peaks or not. note: displayPeaks has to be true

int dynamicBouncingPeaks = false; // bounce less with lower peaks. note: bouncingPeaks has to be true

// initialize other variables

int numOfSegments, halfNumOfSegments, stripMiddle, maxDisplaySegments;

float sensitivityFactor;

float nonLinearResponseFactor;

int brightnessValue, prevBrightnessValue;

float ledFactor, ledFactor_div_numOfSegments;

uint32_t stripMiddleColor, stripOverflowColor, stripHoldColor;

uint32_t colorValue;

int leftValue = 0, rightValue = 0, maxReadValue = 0;

int leftValueN = 0, rightValueN = 0;

int leftAnalogValue = 0, rightAnalogValue = 0;

float log10MaxDisplaySegments;

int prevLeftValue = 0, prevRightValue = 0;

int prevLeftAnalogValue = 0, prevRightAnalogValue = 0;

int selectButton1PinState = 0, prevSelectButton1PinState = 0;

int selectButton2PinState = 0, prevSelectButton2PinState = 0;

int selectButton1PinSetting = colorScheme;

int selectButton2PinSetting = 0;

int i, j;

int dropLeft, dropRight;

int leftDropTime, rightDropTime;

int leftPeak = 0, rightPeak = 0;

int leftPeakTime = 0, rightPeakTime = 0;

int leftFirstPeak = true, rightFirstPeak = true;

int showPeaksPinSetting, prevShowPeaksPinSetting;

int stripPulseMiddle = 0;

int halfLeftValue, halfRightValue, halfPrevLeftValue, halfPrevRightValue;

int leftPeakBouncing = false, rightPeakBouncing = false;

int leftPeakBounce = 0, rightPeakBounce = 0;

int prevLeftPeakBounce = 0, prevRightPeakBounce = 0;

int leftPeakBounceCounter = 0, rightPeakBounceCounter = 0;

int leftPeakBounceDelayCounter = 0, rightPeakBounceDelayCounter = 0;

int leftBouncingPeaksNumOfLeds = 0, rightBouncingPeaksNumOfLeds = 0;

float bounceFactor;

int colorScheme11SpinValue = 0, colorScheme11SpinDelayValue = 0;

int colorSchemeFactor = 1;

long selectButton1Timer;

int spinDelayCounter = 0, spinCounter = 0, spinTurnsCounter = 0, spinTurnsMax = 0, spinTurnsDelay = 0, spinTurnsDelayMax = 0;

int spinCounterInc = 1;

int spinDelay = 0;

// initialize the strip or rings

Adafruit_NeoPixel left_strip = Adafruit_NeoPixel(stripNumOfLeds, leftStripPin, NEO_GRB + NEO_KHZ800);

Adafruit_NeoPixel right_strip = Adafruit_NeoPixel(stripNumOfLeds, rightStripPin, NEO_GRB + NEO_KHZ800);

// setup

void setup() {

#ifdef DEBUG

Serial.begin(9600);

#endif

randomSeed(analogRead(2));

if (stripsOn2Pins) {

numOfSegments = stripNumOfLeds;

maxDisplaySegments = numOfSegments - 1;

stripMiddle = stripNumOfLeds;

stripPulseMiddle = stripMiddle / 2;

spinCircle = false;

}

else {

numOfSegments = stripNumOfLeds / 2;

stripMiddle = stripNumOfLeds / 2;

maxDisplaySegments = stripMiddle - 1;

stripPulseMiddle = stripMiddle / 2;

}

halfNumOfSegments = numOfSegments / 2;

bounceFactor = (float) bouncingPeaksNumOfLeds / (maxDisplaySegments - bouncingPeaksNumOfLeds);

nonLinearResponseFactor = 90 / (float) maxDisplaySegments;

log10MaxDisplaySegments = log10(maxDisplaySegments);

pinMode(showPeaksPin, INPUT);

if (useSelectButton1)

pinMode(selectButton1Pin, INPUT);

left_strip.begin();

if (stripsOn2Pins)

right_strip.begin();

if (useSensorValues) {

readSensorValues();

setInitialDisplayPeaks();

}

else {

setStripColors();

setSensitivityFactor();

}

#ifdef DEBUG_TEST_LEDS

displayTest();

#endif

startupAnimation();

}

// main loop

void loop() {

#ifdef DEBUG_PRINT_LOOP_TIME

long time = millis();

#endif

if (useSensorValues)

readSensorValues();

readValues();

#if defined (DEBUG_NO_PEAKS)

displayPeaks = false;

#endif

#if defined (DEBUG_PEAKS)

displayPeaks = true;

#endif

if (pulsing) {

drawPulsingValues();

}

else {

drawValues();

if (displayPeaks) {

getPeaks();

drawPeaks();

}

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

storePrevValues();

checkSpinCircle();

#ifdef DEBUG_PRINT_LOOP_TIME

time = millis() - time;

Serial.println(time);

#endif

}

// functions

void setInitialDisplayPeaks() {

#if !defined (DEBUG_NO_PEAK_SWITCH)

showPeaksPinSetting = digitalRead(showPeaksPin);

if (showPeaksPinSetting == HIGH)

displayPeaks = false;

#endif

if (reverseShowPeaks) {

if (!displayPeaks)

displayPeaks = true;

else

displayPeaks = false;

}

prevShowPeaksPinSetting = showPeaksPinSetting;

}

void readSensorValues() {

// peaks pin

#if !defined (DEBUG_NO_PEAK_SWITCH)

showPeaksPinSetting = digitalRead(showPeaksPin);

if (showPeaksMomentarySwitch) {

if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH) {

if (displayPeaks == true) {

displayPeaks = false;

clearLeftPeak();

clearRightPeak();

if (showPeaksMomentarySwitch)

while (digitalRead(showPeaksPin) == LOW) {}

}

else {

displayPeaks = true;

}

else {

if (reverseShowPeaks) {

if (showPeaksPinSetting == HIGH && prevShowPeaksPinSetting == LOW)

displayPeaks = true;

else if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH) {

displayPeaks = false;

clearLeftPeak();

clearRightPeak();

}

else {

if (showPeaksPinSetting == LOW && prevShowPeaksPinSetting == HIGH)

displayPeaks = true;

else if (showPeaksPinSetting == HIGH && prevShowPeaksPinSetting == LOW) {

displayPeaks = false;

clearLeftPeak();

clearRightPeak();

}

if (pulsing) {

if (displayPeaks)

displayTopAsPeak = true;

else

displayTopAsPeak = false;

}

prevShowPeaksPinSetting = showPeaksPinSetting;

#endif

// selectButtonPin 1 and 2

if (useSelectButton1) {

selectButton1PinState = digitalRead(selectButton1Pin);

if (selectButton1PinState == HIGH && prevSelectButton1PinState == LOW)

selectButton1Timer = millis();

if (selectButton1PinState == HIGH && prevSelectButton1PinState == HIGH) {

if ((millis() - selectButton1Timer) > 1000) {

pulsing = !pulsing;

setStripColors();

displayNumber(colorScheme, 250);

while (digitalRead(selectButton1Pin) == HIGH) {}

selectButton1PinState = LOW;

clearValues();

}

else if (selectButton1PinState == LOW && prevSelectButton1PinState == HIGH) {

selectButton1PinSetting++;

if (selectButton1PinSetting > maxColorScheme) {

selectButton1PinSetting = 0;

}

colorScheme = selectButton1PinSetting;

if (colorScheme == 12)

colorScheme11SpinValue = (colorScheme11SpinValue * colorScheme12Factor);

setStripColors();

displayNumber(colorScheme, 250);

}

prevSelectButton1PinState = selectButton1PinState;

}

if (useSelectButton2) {

selectButton2PinState = digitalRead(selectButton2Pin);

if (selectButton2PinState == HIGH && prevSelectButton2PinState == LOW) {

selectButton2PinSetting++;

switch(selectButton2PinSetting) {

case 0:

case 3: {

pulsing = false;

spinCircle = false;

selectButton2PinSetting = 0;

break;

}

case 1: {

pulsing = true;

spinCircle= false;

break;

}

case 2: {

pulsing = true;

spinCircle = true;

break;

}

setStripColors();

displayNumber(colorScheme, 250);

}

prevSelectButton2PinState = selectButton2PinState;

}

// brightness

brightnessValue = analogRead(brightnessPin);

brightnessValue = map(brightnessValue, 0, 1023, 0, 255);

if (abs(brightnessValue - prevBrightnessValue) > sensorDeviationBrightness) {

ledBrightness = brightnessValue;

setStripColors();

prevBrightnessValue = brightnessValue;

}

// colorscheme 11 spinning wheel

if (colorScheme == 11 || colorScheme == 12) {

colorScheme11SpinDelayValue++;

if (colorScheme11SpinDelayValue == colorScheme11SpinDelay) {

colorScheme11SpinDelayValue = 0;

colorScheme11SpinValue++;

if (colorScheme11SpinValue > maxDisplaySegments * colorSchemeFactor)

colorScheme11SpinValue = 0;

setStripColors();

}

// sensitivity

sensitivityValue = analogRead(sensitivityPin);

sensitivityValue = map(sensitivityValue, 0, 1023, 0, 255);

setSensitivityFactor();

}

void setSensitivityFactor() {

//sensitivityValue_div_numOfSegments = sensitivityValue / numOfSegments;

sensitivityFactor = ((float) sensitivityValue / 255 * (float) maxSensitivity / 255);

}

void readValues() {

#ifdef averageReadings

leftAnalogValue = 0;

rightAnalogValue = 0;

for (i = 0; i <= averageNumOfReadings; i++) {

leftAnalogValue += analogRead(leftPin);

rightAnalogValue += analogRead(rightPin);

}

leftAnalogValue /= averageNumOfReadings;

rightAnalogValue /= averageNumOfReadings;

#else

leftAnalogValue = analogRead(leftPin);

rightAnalogValue = analogRead(rightPin);

#endif

if (swapLeftRight) {

int tempValue = leftAnalogValue;

leftAnalogValue = rightAnalogValue;

rightAnalogValue = tempValue;

}

if (leftAnalogValue < prevLeftAnalogValue) {

leftDropTime++;

if (leftDropTime > dropDelay) {

leftAnalogValue = prevLeftAnalogValue * dropFactor;

leftDropTime = 0;

}

else

leftAnalogValue = prevLeftAnalogValue;

}

if (rightAnalogValue < prevRightAnalogValue) {

rightDropTime++;

if (rightDropTime > dropDelay) {

rightAnalogValue = prevRightAnalogValue * dropFactor;

rightDropTime = 0;

}

else

rightAnalogValue = prevRightAnalogValue;

}

#ifdef DEBUG_PRINT_ANALOGVALUES

Serial.print(leftAnalogValue);

Serial.print(" ");

Serial.println(rightAnalogValue);

#endif

// map values

leftValue = map(leftAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);

rightValue = map(rightAnalogValue * sensitivityFactor, minValue, maxValue, 0, maxDisplaySegments);

// if defined, convert to (reverse) non linear response

boolean flagNonLinear = false;

#if defined (nonLinearSinAudio)

flagNonLinear = true;

leftValueN = ((sin(((leftValue * nonLinearResponseFactor) + 270) * 0.0174533) + 1) * maxDisplaySegments);

rightValueN = ((sin(((rightValue * nonLinearResponseFactor) + 270) * 0.0174533) + 1) * maxDisplaySegments);

#elif defined (nonLinearReverseSinAudio)

flagNonLinear = true;

leftValueN = ((sin(((leftValue * nonLinearResponseFactor)) * 0.0174533)) * maxDisplaySegments);

rightValueN = ((sin(((rightValue * nonLinearResponseFactor)) * 0.0174533)) * maxDisplaySegments);

#elif defined (nonLinearLogAudio)

flagNonLinear = true;

leftValueN = ((log10(leftValue + 1) / log10MaxDisplaySegments * maxDisplaySegments));

rightValueN = ((log10(rightValue + 1) / log10MaxDisplaySegments * maxDisplaySegments));

#endif

if (flagNonLinear == true) {

#if defined (nonLinearAvr2)

leftValue = (leftValue + leftValueN) / 2;

rightValue = (rightValue + rightValueN) / 2;

#else

leftValue = leftValueN;

rightValue = rightValueN;

#endif

}

// @EB_DEBUG

#ifdef displayOverflow

#ifdef compressOverflowPeaks

for (i = 1; i <= compressOverflowNumOfTimes; i++) {

if (leftValue > maxDisplaySegments) {

// Serial.print(i);

// Serial.print(" ");

// Serial.print(leftValue);

// Serial.print(" ");

leftValue = leftValue - leftValue * compressOverflowFactor * i;

// Serial.print(leftValue);

// Serial.print(" ");

// Serial.println(maxDisplaySegments);

}

#endif

if (leftValue > maxDisplaySegments) {

leftValue = maxDisplaySegments;

#ifdef displayOverflow

drawOverflow();

#endif

}

#ifdef displayOverflow

#ifdef compressOverflowPeaks

if (rightValue > maxDisplaySegments)

rightValue = rightValue - rightValue * compressOverflowFactor;

#endif

if (rightValue > maxDisplaySegments) {

rightValue = maxDisplaySegments;

#ifdef displayOverflow

drawOverflow();

#endif

}

void storePrevValues() {

prevLeftAnalogValue = leftAnalogValue;

prevRightAnalogValue = rightAnalogValue;

prevLeftValue = leftValue;

prevRightValue = rightValue;

}

void getPeaks() {

if (leftValue > leftPeak) {

if (dynamicBouncingPeaks || prevLeftPeakBounce > 0)

clearLeftBouncePeak();

leftPeak = leftValue;

leftPeakTime = 0;

leftFirstPeak = true;

if (bouncingPeaks) {

leftPeakBouncing = true;

leftPeakBounceCounter = 0;

leftPeakBounceDelayCounter = 0;

if (dynamicBouncingPeaks)

leftBouncingPeaksNumOfLeds = max(bouncingPeaksNumOfLedsMin, (leftPeak * bounceFactor));

else

leftBouncingPeaksNumOfLeds = bouncingPeaksNumOfLeds;

}

else {

leftPeakTime++;

if (droppingPeak) {

if (leftFirstPeak) {

if (leftPeakTime > peakTimeFirstDropDelay) {

clearLeftPeak();

leftFirstPeak = false;

}

else {

if (leftPeakTime > peakTimeDropDelay) {

clearLeftPeak();

}

else {

if (leftPeakTime > peakTimeNoDropDelay) {

clearLeftPeak();

}

if (leftPeakBouncing) {

if (leftFirstPeak) {

leftPeakBounceDelayCounter++;

if (leftPeakBounceDelayCounter >= bouncingPeakDelay) {

leftPeakBounceDelayCounter = 0;

leftPeakBounceCounter += bouncingPeakCounterInc;

if (leftPeakBounceCounter >= 180) {

clearLeftBouncePeak();

clearLeftBounce();

}

else {

leftPeakBounce = min((sin(leftPeakBounceCounter * 0.0174533) * leftBouncingPeaksNumOfLeds), (maxDisplaySegments - leftPeak));

if (leftPeakBounce != prevLeftPeakBounce) {

clearLeftBouncePeak();

}

prevLeftPeakBounce = leftPeakBounce;

}

if (rightValue > rightPeak) {

if (dynamicBouncingPeaks || prevRightPeakBounce > 0)

clearRightBouncePeak();

rightPeak = rightValue;

rightPeakTime = 0;

rightFirstPeak = true;

if (bouncingPeaks) {

rightPeakBouncing = true;

rightPeakBounceCounter = 0;

rightPeakBounceDelayCounter = 0;

if (dynamicBouncingPeaks)

rightBouncingPeaksNumOfLeds = max(bouncingPeaksNumOfLedsMin, (rightPeak * bounceFactor));

else

rightBouncingPeaksNumOfLeds = bouncingPeaksNumOfLeds;

}

else {

rightPeakTime++;

if (droppingPeak) {

if (rightFirstPeak) {

if (rightPeakTime > peakTimeFirstDropDelay) {

clearRightPeak();

rightFirstPeak = false;

}

else {

if (rightPeakTime > peakTimeDropDelay)

clearRightPeak();

}

else {

if (rightPeakTime > peakTimeNoDropDelay)

clearRightPeak();

}

if (rightPeakBouncing) {

if (rightFirstPeak) {

rightPeakBounceDelayCounter++;

if (rightPeakBounceDelayCounter >= bouncingPeakDelay) {

rightPeakBounceDelayCounter = 0;

rightPeakBounceCounter += bouncingPeakCounterInc;

if (rightPeakBounceCounter >= 180) {

clearRightBouncePeak();

clearRightBounce();

}

else {

rightPeakBounce = min((sin(rightPeakBounceCounter * 0.0174533) * rightBouncingPeaksNumOfLeds), (maxDisplaySegments - rightPeak));

if (rightPeakBounce != prevRightPeakBounce) {

clearRightBouncePeak();

}

prevRightPeakBounce = rightPeakBounce;

}

void checkSpinCircle () {

if (spinCircle) {

if (spinTurnsMax == 0) {

spinTurnsMax = random(stripNumOfLeds / 4, stripNumOfLeds * 3); // spin at least a quarter turn, max 3 turns

if (random(10) > 4)

spinCounterInc = -spinCounterInc;

spinTurnsDelayMax = random(100, 1000); // @EB_DEBUG

spinDelay = random(20, 75); // @EB_DEBUG

}

if (spinTurnsCounter == spinTurnsMax) {

spinTurnsDelay++;

if (spinTurnsDelay == spinTurnsDelayMax) {

spinTurnsDelay = 0;

spinTurnsCounter = 0;

spinTurnsMax = 0;

}

else {

spinDelayCounter++;

if (spinDelayCounter > spinDelay) {

clearZeroAndPeaks();

spinCounter += spinCounterInc;

if (spinCounter > stripNumOfLeds)

spinCounter = 0;

else if (spinCounter < 0)

spinCounter = stripNumOfLeds;

spinTurnsCounter++;

spinDelayCounter = 0;

}

int getSpinCircleValue(int value) {

if (!spinCircle)

return value;

else {

int calcValue = value + spinCounter;

if (calcValue >= stripNumOfLeds)

calcValue -= stripNumOfLeds;

return calcValue;

}

void drawValues() {

if (splitStrip) {

for (i = middleOffset; i < leftValue; i++)

left_strip.setPixelColor(getSpinCircleValue(i), stripColor[i]);

if (!displayPeaks && displayTopAsPeak)

left_strip.setPixelColor(getSpinCircleValue(leftValue), stripHoldColor);

for (i = prevLeftValue; i >= leftValue; i--)

left_strip.setPixelColor(getSpinCircleValue(i), 0);

if (stripsOn2Pins) {

for (i = middleOffset; i < rightValue; i++)

right_strip.setPixelColor(i, stripColor[i]);

if (!displayPeaks && displayTopAsPeak)

right_strip.setPixelColor(rightValue, stripHoldColor);

for (i = prevRightValue; i >= rightValue; i--)

right_strip.setPixelColor(i, 0);

}

else {

for (i = middleOffset; i < rightValue; i++)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripColor[i]);

if (!displayPeaks && displayTopAsPeak)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightValue), stripHoldColor);

for (i = prevRightValue; i >= rightValue; i--)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);

}

else {

for (i = middleOffset; i < leftValue; i++)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripColor[i]);

if (!displayPeaks && displayTopAsPeak)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + leftValue), stripHoldColor);

for (i = prevLeftValue; i >= leftValue; i--)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);

for (i = middleOffset; i < rightValue; i++)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), stripColor[i]);

if (!displayPeaks && displayTopAsPeak)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - rightValue), stripHoldColor);

for (i = prevRightValue; i >= rightValue; i--)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), 0);

}

if (displayMiddleLed)

left_strip.setPixelColor(getSpinCircleValue(stripMiddle), stripMiddleColor);

}

void drawPulsingValues() {

halfLeftValue = (leftValue + 1) / 2;

halfRightValue = (rightValue + 1) / 2;

halfPrevLeftValue = (prevLeftValue + 1)/ 2;

halfPrevRightValue = (prevRightValue + 1) / 2;

if (splitStrip) {

for (i = 0; i < halfLeftValue; i++) {

colorValue = stripColor[i * 2];

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + i), colorValue);

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - i), colorValue);

}

if (displayTopAsPeak) {

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfLeftValue), stripHoldColor);

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfLeftValue), stripHoldColor);

}

for (i = halfPrevLeftValue; i >= halfLeftValue; i--) {

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + i), 0);

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - i), 0);

}

if (stripsOn2Pins) {

for (i = 0; i < halfRightValue; i++) {

colorValue = stripColor[i * 2];

right_strip.setPixelColor((stripPulseMiddle + i), colorValue);

right_strip.setPixelColor((stripPulseMiddle - i), colorValue);

}

if (displayTopAsPeak) {

right_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfRightValue), stripHoldColor);

right_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfRightValue), stripHoldColor);

}

for (i = halfPrevRightValue; i >= halfRightValue; i--) {

right_strip.setPixelColor((stripPulseMiddle + i), 0);

right_strip.setPixelColor((stripPulseMiddle - i), 0);

}

else {

for (i = 0; i < halfRightValue; i++) {

colorValue = colorValue = stripColor[i * 2];

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), colorValue);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), colorValue);

}

if (displayTopAsPeak) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfRightValue), stripHoldColor);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfRightValue), stripHoldColor);

}

for (i = halfPrevRightValue; i >= halfRightValue; i--) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), 0);

}

else {

for (i = 0; i < halfLeftValue; i++) {

colorValue = colorValue = stripColor[i * 2];

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), colorValue);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), colorValue);

}

if (displayTopAsPeak) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfLeftValue), stripHoldColor);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfLeftValue), stripHoldColor);

}

for (i = halfPrevLeftValue; i >= halfLeftValue; i--) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + i), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - i), 0);

}

for (i = 0; i < halfRightValue; i++) {

colorValue = colorValue = stripColor[i * 2];

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + i)), colorValue);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - i)), colorValue);

}

if (displayTopAsPeak) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + halfRightValue)), stripHoldColor);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - halfRightValue)), stripHoldColor);

}

for (i = halfPrevRightValue; i >= halfRightValue; i--) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + i)), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - i)), 0);

}

if (displayMiddleLed) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - stripPulseMiddle), stripMiddleColor);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle), stripMiddleColor);

}

void clearZeroAndPeaks() {

left_strip.setPixelColor(getSpinCircleValue(middleOffset), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle), 0);

if (displayTopAsPeak) {

if (splitStrip) {

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle + halfLeftValue), 0);

left_strip.setPixelColor(getSpinCircleValue(stripPulseMiddle - halfLeftValue), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfRightValue), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfRightValue), 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle + halfLeftValue), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + stripPulseMiddle - halfLeftValue), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle + halfRightValue)), 0);

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (stripPulseMiddle - halfRightValue)), 0);

}

void drawPeaks() {

if (leftPeak > 0) {

if (droppingPeakFade && leftPeakBouncing == false)

stripHoldColor = left_strip.Color(max(1, (255 * leftPeak * ledFactor_div_numOfSegments)), 0, 0);

else

stripHoldColor = stripColor[numOfSegments];

if (splitStrip)

left_strip.setPixelColor(getSpinCircleValue(leftPeak + leftPeakBounce), stripHoldColor);

else

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + leftPeakBounce)), stripHoldColor);

}

if (rightPeak > 0) {

if (droppingPeakFade && rightPeakBouncing == false)

stripHoldColor = left_strip.Color(max(1, (255 * rightPeak * ledFactor_div_numOfSegments)), 0, 0);

else

stripHoldColor = stripColor[numOfSegments];

if (splitStrip) {

if (stripsOn2Pins) {

right_strip.setPixelColor(getSpinCircleValue(rightPeak + rightPeakBounce), stripHoldColor);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightPeak + rightPeakBounce), stripHoldColor);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + rightPeakBounce)), stripHoldColor);

}

//if (leftPeak > 0 || rightPeak > 0)

// left_strip.show();

}

void clearLeftPeak() {

if (splitStrip)

left_strip.setPixelColor(getSpinCircleValue(leftPeak + prevLeftPeakBounce), 0);

else

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + prevLeftPeakBounce)), 0);

if (droppingPeak)

leftPeak = leftPeak * peakDropFactor;

else

leftPeak = 0;

leftPeakTime = 0;

}

void clearRightPeak() {

if (splitStrip) {

if( stripsOn2Pins) {

right_strip.setPixelColor(getSpinCircleValue(rightPeak + prevRightPeakBounce), 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + rightPeak + prevRightPeakBounce), 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + prevRightPeakBounce)), 0);

}

if (droppingPeak)

rightPeak = rightPeak * peakDropFactor;

else

rightPeak = 0;

rightPeakTime = 0;

}

void clearLeftBouncePeak() {

if (splitStrip)

left_strip.setPixelColor(getSpinCircleValue(leftPeak + prevLeftPeakBounce), 0);

else

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + (leftPeak + prevLeftPeakBounce)), 0);

}

void clearRightBouncePeak() {

if (splitStrip) {

if (stripsOn2Pins) {

right_strip.setPixelColor(getSpinCircleValue(rightPeak + prevRightPeakBounce), 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue((stripMiddle + rightPeak + prevRightPeakBounce)), 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - (rightPeak + prevRightPeakBounce)), 0);

}

void clearLeftBounce() {

leftPeakBouncing = false;

leftPeakBounceCounter = 0;

leftPeakBounce = 0;

prevLeftPeakBounce = 0;

leftBouncingPeaksNumOfLeds = 0;

}

void clearRightBounce() {

rightPeakBouncing = false;

rightPeakBounceCounter = 0;

rightPeakBounce = 0;

prevRightPeakBounce = 0;

leftBouncingPeaksNumOfLeds = 0;

}

void clearValues() {

leftAnalogValue = 0;

rightAnalogValue = 0;

prevLeftAnalogValue = 0;

prevRightAnalogValue = 0;

leftPeak = 0;

rightPeak = 0;

}

void drawOverflow() {

for (i = 0; i <= numOfSegments; i++) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), stripOverflowColor);

if (stripsOn2Pins) {

right_strip.setPixelColor(i, stripOverflowColor);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), stripOverflowColor);

}

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

delay(overflowDelay);

for (i = 0; i <= numOfSegments; i++) {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle - i), 0);

if (stripsOn2Pins) {

right_strip.setPixelColor(i, 0);

}

else {

left_strip.setPixelColor(getSpinCircleValue(stripMiddle + i), 0);

}

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

}

void setStripColors() {

int r, g, b;

int p1, p2;

ledFactor = (float) ledBrightness / 255;

ledFactor_div_numOfSegments = (float) ledFactor / (float) numOfSegments;

stripMiddleColor = left_strip.Color(0, 0, 255 * ledFactor);

switch (colorScheme) {

case 0: {

int orangeLimit;

float orangeFactor = orangeLimitAmount / halfNumOfSegments;

for (i = 0; i <= numOfSegments; i++) {

if (i <= halfNumOfSegments)

orangeLimit = (i * orangeFactor);

else

orangeLimit = ((numOfSegments - i) * orangeFactor);

stripColor[i] = left_strip.Color((255 * i * ledFactor_div_numOfSegments), ((255 - orangeLimit) * (numOfSegments - i) * ledFactor_div_numOfSegments), 0);

}

break;

}

case 1: {

for (i = 0; i <= numOfSegments; i++) {

stripColor[i] = left_strip.Color(0, (255 * i * ledFactor_div_numOfSegments), (255 * (numOfSegments - i) * ledFactor_div_numOfSegments));

}

break;

}

case 2: {

for (i = 0; i <= numOfSegments; i++) {

stripColor[i] = left_strip.Color((255 * i * ledFactor_div_numOfSegments), 0, (255 * (numOfSegments - i) * ledFactor_div_numOfSegments));

}

break;

}

case 3: {

for (i = 0; i <= numOfSegments; i++) {

stripColor[i] = left_strip.Color((255 * (numOfSegments - i) * ledFactor_div_numOfSegments), 0, (255 * i * ledFactor_div_numOfSegments));

}

break;

}

case 4: {

for (i = 0; i <= numOfSegments; i++) {

stripColor[i] = left_strip.Color(0, (255 * (numOfSegments - i) * ledFactor_div_numOfSegments), (255 * i * ledFactor_div_numOfSegments));

}

break;

}

case 5: {

for (i = 0; i <= numOfSegments; i++) {

stripColor[i] = left_strip.Color((255 * (numOfSegments - i) * ledFactor_div_numOfSegments), (255 * i * ledFactor_div_numOfSegments), 0);

}

break;

}

case 6: {

for (i = 0; i <= numOfSegments; i++) {

r = (255 * i * ledFactor_div_numOfSegments);

g = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);

b = (200 * (numOfSegments - i) * ledFactor_div_numOfSegments);

stripColor[i] = left_strip.Color(r, g, b);

}

break;

}

case 7: {

for (i = 0; i <= numOfSegments; i++) {

b = (255 * i * ledFactor_div_numOfSegments);

g = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);

r = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments);

stripColor[i] = left_strip.Color(r, g, b);

}

break;

}

case 8: {

for (i = 0; i <= numOfSegments; i++) {

r = (255 * i * ledFactor_div_numOfSegments);

b = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);

g = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments);

stripColor[i] = left_strip.Color(r, g, b);

}

break;

}

case 9: {

for (i = 0; i <= numOfSegments; i++) {

b = (255 * i * ledFactor_div_numOfSegments);

r = (255 * min(i, numOfSegments - i) * ledFactor_div_numOfSegments);

g = (255 * (numOfSegments - i) * ledFactor_div_numOfSegments);

stripColor[i] = left_strip.Color(r, g, b);

}

break;

}

case 10:

colorScheme11SpinValue = 0;

case 11:

case 12: {

p1 = (85 * numOfSegments / 255);

p2 = (170 * numOfSegments / 255);

int wheel;

if (colorScheme == 12)

colorSchemeFactor = colorScheme12Factor;

else

colorSchemeFactor = 1;

for (i = 0; i <= numOfSegments; i++) {

//wheel = int(float(i + colorScheme11SpinValue) / colorSchemeFactor) % numOfSegments; // reverse wheel

wheel = int(float(i - colorScheme11SpinValue) / colorSchemeFactor + numOfSegments) % numOfSegments;

if (wheel < p1) {

wheel = map(wheel, 0, p1, 0, 255);

r = (wheel * ledFactor);

g = ((255 - wheel) * ledFactor);

b = 0;

}

else if (wheel < p2) {

wheel = map(wheel, p1, p2, 0, 255);

r = ((255 - wheel) * ledFactor);

g = 0;

b = (wheel * ledFactor);

}

else {

wheel = map(wheel, p2, numOfSegments, 0, 255);

r = 0;

g = (wheel * ledFactor);

b = ((255 - wheel) * ledFactor);

}

stripColor[i] = left_strip.Color(r, g, b);

}

break;

}

if (colorScheme >= 10)

stripHoldColor = left_strip.Color(255 * ledFactor, 0, 0); // set to red for the color wheels

else

stripHoldColor = stripColor[numOfSegments];

stripOverflowColor = stripHoldColor; // left_strip.Color(min(255, 255 * ledFactor * 1.5), 0, 0);

}

void startupAnimation() {

for (j = 0; j < 2; j++) {

for (i = 0; i <= numOfSegments; i++) {

if (animType == 1)

left_strip.setPixelColor(stripMiddle - (numOfSegments - i), stripColor[i]);

else

left_strip.setPixelColor(stripMiddle - i, stripColor[i]);

if (stripsOn2Pins)

right_strip.setPixelColor(i, stripColor[i]);

else

left_strip.setPixelColor(stripMiddle + i, stripColor[i]);

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

delay(startupAnimationDelay);

}

for (i = 0; i <= numOfSegments; i++) {

if (animType == 1)

left_strip.setPixelColor(stripMiddle - (numOfSegments - i), 0);

else

left_strip.setPixelColor(stripMiddle - i, 0);

if (stripsOn2Pins)

right_strip.setPixelColor(i, 0);

else

left_strip.setPixelColor(stripMiddle + i, 0);

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

delay(startupAnimationDelay);

}

void displayNumber (int number, int displayDelay) {

left_strip.clear();

if (stripsOn2Pins)

right_strip.clear();

number++; // @EB_DEBUG : display value 0 at led 1

for (i = 0; i <= number; i++) {

if (i % 5 == 0)

colorValue = stripMiddleColor;

else

colorValue = stripColor[0];

left_strip.setPixelColor(middleOffset + i, colorValue);

if (stripsOn2Pins)

right_strip.setPixelColor(middleOffset + i, colorValue);

else

left_strip.setPixelColor(stripMiddle + middleOffset + i, colorValue);

delay(45 - number * 3); // @EB_DEBUG

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

}

if (pulsing) {

left_strip.setPixelColor(middleOffset + maxDisplaySegments, stripMiddleColor);

if (stripsOn2Pins)

right_strip.setPixelColor(maxDisplaySegments, stripMiddleColor);

else

left_strip.setPixelColor(stripMiddle + maxDisplaySegments, stripMiddleColor);

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

}

delay(displayDelay);

left_strip.clear();

if (stripsOn2Pins)

right_strip.clear();

}

// for debugging

#ifdef DEBUG_TEST_LEDS

void displayTest() {

for (i = 0; i <= numOfSegments; i++) {

left_strip.setPixelColor(stripMiddle - i, stripColor[i]);

if (stripsOn2Pins)

right_strip.setPixelColor(i, stripColor[i]);

else

left_strip.setPixelColor(stripMiddle + i, stripColor[i]);

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

delay(50);

}

delay(5000);

for (i = 0; i <= numOfSegments; i++) {

left_strip.setPixelColor(stripMiddle - i, 0);

if (stripsOn2Pins)

right_strip.setPixelColor(i, 0);

else

left_strip.setPixelColor(stripMiddle + i, 0);

left_strip.show();

if (stripsOn2Pins)

right_strip.show();

}

void serialDisplayRGB(int r, int g, int b) {

Serial.print(i);

Serial.print(" ");

Serial.print(r);

Serial.print(" ");

Serial.print(g);

Serial.print(" ");

Serial.println(b);

}

#endif

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Стерео измеритель уровня звука на Arduino и светодиодных кольцах от NeoPixel

Необходимые компоненты

Основная идея проекта

Схема проекта

Объяснение работы стерео измерителя уровня звука

Добавление микрофона вместо линейного ввода

Исходный код программы (скетча)

Скетч для версии проекта 05.11.2017

Скетч для версии проекта 02.02.2018

Добавить комментарий Отменить ответ

Необходимые компоненты

Основная идея проекта

Схема проекта

Объяснение работы стерео измерителя уровня звука

Добавление микрофона вместо линейного ввода

Исходный код программы (скетча)

Скетч для версии проекта 05.11.2017

Скетч для версии проекта 02.02.2018

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