lights.c

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN 6

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(60, PIN, NEO_GRB + NEO_KHZ800);


const int numReadings = 45;

//400 great 

int readings[numReadings];      // the readings from the analog input
int readIndex = 0;              // the index of the current reading
int total = 0;                  // the running total
int average = 0;                // the average

int inputPin = 0;

int k = 0;

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.

void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code
  
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  for (int thisReading = 0; thisReading < numReadings; thisReading++) {
    readings[thisReading] = 0;
  }

  //Serial.println("ASCII Table ~ Character Map");
  strip.begin();
  for (int i = 0; i < 3; i++) {
    rainbow(0);
  }
  strip.show(); // Initialize all pixels to 'off'
  
  pinMode(inputPin, INPUT_PULLUP);
}

int previousBrightness = 0;
int wheelVal = 0;
void loop() {
  
  //int voltage = analogRead(inputPin) / 4;
  
  

  total = total - readings[readIndex];
  // read from the sensor:
  readings[readIndex] = analogRead(inputPin);
  // add the reading to the total:
  total = total + readings[readIndex];
  // advance to the next position in the array:
  readIndex = readIndex + 1;

  // if we're at the end of the array...
  if (readIndex >= numReadings) {
    // ...wrap around to the beginning:
    readIndex = 0;
  }

  // calculate the average:
  average = total / numReadings;
  
  //int voltage = average / 4;
  
  int voltage = average;
  int brightness = map(voltage, 0, 45, 0, 255);
//  if (brightness != previousBrightness) {
//    int difference = (brightness - previousBrightness);
//    int interval = (abs(difference)/3)+1;
////    if (difference > 0) {
////      //New voltage is higher, step there
////      for (int i = previousBrightness; i < brightness; i+=interval) {
////        strip.setBrightness(i);        
////      }
////    } else {
////      for (int i = previousBrightness; i > brightness; i-=interval) {
////        strip.setBrightness(i);
////      }
////    }
//    previousBrightness = brightness;
//  }
  wheelVal = (wheelVal & 255) + 1;
  if (brightness > 255) {
    brightness = 255; 
  }
  strip.setBrightness(brightness);
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, (Wheel((10+(i*8+(brightness))) & 255)));
  }
  strip.show();
    delay(2);
}

void clearStrip() {
  fillStrip(strip.Color(0,0,0));
  strip.show();
}

void fillStrip(uint32_t c) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
  }
  strip.show();
}

void fillFromEnds(uint32_t c) {
  
}

void alternateColors(uint32_t c1, uint32_t c2) {
  for(int16_t i=0; i<strip.numPixels(); i++) {
    //Serial.println("Inner Pixel number: ");
    //strip.setPixelColor(i, c2);
    for(int j = 0; j<strip.numPixels(); j++) {
      //Serial.println("Inner Pixel number: " + String(j));
      int modOuter = i % 2;
      int modInner = j % 3;
      //Serial.println(mod);
     
      if ((modOuter == 0 && modInner == 2) || (modOuter == 1 && modInner == 1)) {
        strip.setPixelColor(j, c1);
        //Serial.println("Color 1");
        //Serial.println("On");
        //delay(wait);
      } else {
        strip.setPixelColor(j, c2);
        //Serial.println("Color 2");
        //strip.show();
        //Serial.println("Off");
        //delay(wait);
      
      }
      
      delay(2);
      
      
      //strip.show();
    }
    strip.show();
    }
    //strip.show();
}

// Fill the dots one after the other with a color
void colorSnake(uint32_t c, uint32_t leng, uint8_t wait) {
  int16_t half;
  half = leng / 2;
  //Serial.println("half: " + String(half));
  for(int16_t i=0; i<strip.numPixels(); i++) {
    //Serial.println("Pixel number: " + String(i));
    
    int16_t virtualMin = 0;
    //int16_t virtualNax = 0 - half;
    
    //Serial.println(String(virtualMin));
    
    for(virtualMin; virtualMin<strip.numPixels(); virtualMin++) {
      //Serial.println("Inner Pixel number: " + String(l));
      if(virtualMin >= 0) {
        if (virtualMin > (i - half) && virtualMin< (i + half) && virtualMin >= 0) {
          strip.setPixelColor(virtualMin, c);
          //Serial.println("On");
          //delay(wait);
        } else {
          strip.setPixelColor(virtualMin, strip.Color(0, 0, 0));
          //strip.show();
          //Serial.println("Off");
          //delay(wait);
        
        }
      }
      
      
      //strip.show();
      
    }  
    
    //strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c);    //turn every third pixel on
      }
      strip.show();

      delay(wait);

      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}

//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
      }
      strip.show();

      delay(wait);

      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}