FastLED Animation Library

  formerly FastSPI_LED / FastSPI_LED2

Fast, easy LED library for Arduino

FastLED is a fast, efficient, easy-to-use Arduino library for programming addressable LED strips and pixels such as WS2810, WS2811, LPD8806, Neopixel and more. FastLED is used by thousands of developers, in countless art and hobby projects, and in numerous commercial products.

We build FastLED to help you get started faster, develop your code faster, and make your code run faster.

Great compatibility

FastLED supports popular LEDs including Neopixel, WS2801, WS2811, WS2812B, LPD8806, TM1809, and more. The library runs on a wide range of Arduino and compatible boards, including both AVR- and ARM- based microcontrollers.

Great features

In addition to fast, efficient, compatible LED driver code, FastLED also provides features that get your animations up and running fast:

  • Full HSV color support as well as classic RGB
  • Master brightness setting (nondestructive) controls brightness, power use, and battery life
  • Fast math and memory functions up to 10X faster than standard Arduino libraries
  • User community of thousands, who share tips, ideas, and help
  • Multi-year history of active development and evolution
  • Ruthless efficiency, an almost fanatical devotion to performance, and nice RGB uniforms.

Get started...

Download the library and get started coding!


Daniel Garcia (focalintent) created FastSPI_LED in 2010, FastSPI_LED2 in 2012.
Mark Kriegsman (kriegsman) joined the project in 2013.