MiniPixel_daisychain.ino

#include <Adafruit_NeoPixel.h>


// Parameter 1 = number of pixels in strip
// Parameter 2 = 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 strip1 = Adafruit_NeoPixel(2, 5, NEO_GRB + NEO_KHZ800);
int pixel1 = 0;
int pixel2 = 1;
// int pixel3 = 2;
// int pixel4 = 3;

int potScale = 4;               // Scale from ~1020 to 255 because
                                // potentiometers send a signal that
                                // is larger than the brightness
                                // values that setPixelColor expects.

int pixelColorR = 255;
int pixelColorG = 255;
int pixelColorB = 40;

void setPixelColor(uint16_t n,
                   uint8_t r,
                   uint8_t g,
                   uint8_t b,
                   uint16_t brightness) {
  strip1.setPixelColor(n,
                       brightness * r / 255,
                       brightness * g / 255,
                       brightness * b / 255);
}

void setup() {
  strip1.begin();
  strip1.show(); // Initialize all pixels to 'off'
}

void loop() {
  int potValue1 = analogRead(0)/potScale;
  int potValue2 = analogRead(1)/potScale;
  // int potValue3 = analogRead(2)/potScale;
  // int potValue4 = analogRead(3)/potScale;

  // set the color for the Pixels:
  setPixelColor(pixel1, pixelColorR, pixelColorG, pixelColorB, potValue1);
  setPixelColor(pixel2, pixelColorR, pixelColorG, pixelColorB, potValue2);
  // setPixelColor(pixel3, pixelColorR, pixelColorG, pixelColorB, potValue3);
  // setPixelColor(pixel4, pixelColorR, pixelColorG, pixelColorB, potValue4);

  // Send the pixel values.
  strip1.show();
}