Arduino sketch for multiple NeoPixels to create spooky 'fire' effect
I have tested this with an Adafruit Metro Mini 5v and an Adafruit Pro Trinket 3v successfully. You'll also need to get your hands on some NeoPixels and the NeoPixel library.
I recommending powering this with a USB battery charger.
Remember to indicate what pin you're using and how many NeoPixel LED's are in your chain:
#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(4, PIN, NEO_GRB + NEO_KHZ800);You can also adjust some parameters of the sketch to easily tweak the fire effect. Here, we are using an orange flame effect by default:
RGB flameColors[] = {
{ 226, 121, 35}, // Orange flame
{ 158, 8, 148}, // Purple flame
{ 74, 150, 12}, // Green flame
{ 226, 15, 30} // Red flame
};I also recently tweaked this sketch to make use of a momentary push button. Pushing the button will cycle to the next item in the color array (effectively changing the color):
// The button pin
const int buttonPin = 2;
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