I am using the Adafruit_NeoPixel library and Arduino Nano to light up my WS2812 RGB LED strips.
Now I had to switch to the fastLED library because I fond an awesome program, but strangely, using any of the demos my LEDs remain black. With Adafruit_NeoPixel they work perfectly.
Anyone know this problem? Is it a hardware problem? Usually I just have to enter PIN and NUMPIXELS and the demos do the rest.