MultipleStripsInOneArray.ino

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// MultipleStripsInOneArray - see https://github.com/FastLED/FastLED/wiki/Multiple-Controller-Examples for more info on
// using multiple controllers.  In this example, we're going to set up four NEOPIXEL strips on three
// different pins, each strip will be referring to a different part of the single led array
 
#include <FastLED.h>
 
#define NUM_STRIPS 3
#define NUM_LEDS_PER_STRIP 60
#define NUM_LEDS NUM_LEDS_PER_STRIP * NUM_STRIPS
 
CRGB leds[NUM_STRIPS * NUM_LEDS_PER_STRIP];
 
// For mirroring strips, all the "special" stuff happens just in setup.  We
// just addLeds multiple times, once for each strip
void setup() {
  // tell FastLED there's 60 NEOPIXEL leds on pin 2, starting at index 0 in the led array
  FastLED.addLeds<NEOPIXEL, 2>(leds, 0, NUM_LEDS_PER_STRIP);
 
  // tell FastLED there's 60 NEOPIXEL leds on pin 3, starting at index 60 in the led array
  FastLED.addLeds<NEOPIXEL, 3>(leds, NUM_LEDS_PER_STRIP, NUM_LEDS_PER_STRIP);
 
  // tell FastLED there's 60 NEOPIXEL leds on pin 4, starting at index 120 in the led array
  FastLED.addLeds<NEOPIXEL, 4>(leds, 2 * NUM_LEDS_PER_STRIP, NUM_LEDS_PER_STRIP);
 
}
 
void loop() {
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Red;
    FastLED.show();
    leds[i] = CRGB::Black;
    delay(100);
  }
}