WS2812B LED Runway Lights

WS2812B_runway_lights.ino

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

#define PIN            9
#define MAGINT         0
#define PHASES         6
#define NUMPIXELS      300

// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
// Note that for older NeoPixel strips you might need to change the third parameter--see the strandtest
// example for more information on possible values.
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int delayval = 25;

void setup() {
  pinMode(PIN, OUTPUT);
  pixels.begin(); // This initializes the NeoPixel library.
}


void loop() {  
  uint8_t r,g,b;
  uint32_t c;
  
  uint16_t i, j, phase, pixel;
  for(i = 0; i < NUMPIXELS; i++){
    for(j = 0; j < NUMPIXELS; j++){
      // Fade all the pixels
      c = pixels.getPixelColor(j);
      r = (uint8_t)(c >> 16),
      g = (uint8_t)(c >>  8),
      b = (uint8_t)c;
      pixels.setPixelColor(j, pixels.Color(max(r - 3, 0), max(g - 2, 0), max(b - 1, 0))); // Fade R and G channels faster for a blue ghost trail
    }

    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    for(phase = 0; phase < PHASES; phase++) {
      pixel = NUMPIXELS / PHASES * phase + i;
      pixels.setPixelColor(circle(pixel, true), pixels.Color(50,50,50));
    }
    pixels.show(); // Push the next frame

    delay(delayval);
  }
}

int circle(int pos, boolean flip) {
  pos = pos >= NUMPIXELS ? pos - NUMPIXELS : pos;
  if(flip) {
    pos = NUMPIXELS - pos - 1;
  }
  return pos;
}