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.

Реклама: ООО «АЛИБАБА.КОМ (РУ)» ИНН: 7703380158

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