FastLED/FastLED
The FastLED library for colored LED animation on Arduino. Please direct questions/requests for help to the FastLED Reddit community: http://fastled.io/r We'd like to use github "issues" just for tracking library bugs / enhancements. observed · 2026-08-28
Health v2 · maintenance only
96/100
- Activity 99
- Release rhythm 89
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 7.0
- age_days: 4680
- days_rel: 79
- days_push: 7
- n_releases_24m: 29
Adoption not part of the score
7476 stars · 1755 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
FastLED is a fast, efficient C++ library for controlling addressable LED strips and pixels (WS2812/Neopixel, APA102, LPD8806, and many more) on Arduino and embedded microcontrollers. It provides RGB/HSV color handling, brightness control, fast math functions, and background rendering across 50+ platforms including ESP32, Teensy, and Raspberry Pi.
Use cases
- animate ws2812/neopixel led strips on arduino
- drive thousands of addressable leds from esp32
- create rgb led animations for art installations
- control led strips on teensy with parallel output
- add hsv color effects to a microcontroller project
- blink and fade led pixels on attiny chips
When to choose
- you need to drive addressable LED strips on Arduino, ESP32, Teensy, or other microcontrollers
- you want high performance, wide chipset support, and a mature, popular library
- you need HSV color math, brightness control, or background rendering for LED animations
When to avoid
- you are controlling non-addressable (dumb) RGB LEDs via PWM
- your project is not on a supported embedded/Arduino platform
- you need a higher-level animation framework with a scene graph rather than a driver library
Facets
library · maturity stable
embedded graphics animation embedded-systems hardware graphics embedded cpp iot cross-platform led addressable-leds ws2812 neopixel apa102 arduino-library rgb hsv
4 sources
- readme: https://github.com/FastLED/FastLED · fetched 2026-08-28 · 7f971a470a2c
- homepage: https://fastled.io · fetched 2026-08-29 · 8d9aa07cd1dc
- site_page: http://fastled.io/docs · fetched 2026-08-29 · 961c07b70e31
- site_page: http://fastled.io/releases · fetched 2026-08-29 · 9d118aa80dca
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| FastLED/FastLED | main | 96 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem