Adafruit FadeCandy - Dithering USB-Controlled Driver for NeoPixels The easiest way to control Adafruit Neopixels Firmware that uses unique dithering and color correction algorithms to raise the bar for quality while getting out of the way of your creativity Open source hardware for connecting cheap and popular WS2811 based LEDs to a laptop, desktop, or Raspberry Pi over USB. Libraries and examples on Adafruit for popular languages. We have Python and Processing already, with Javascript and Max coming soon.