PCA9685

Specifications

16-channel, 12-bit PWM Fm+ I²C-bus LED controller

Datasheets

NXP Datasheet

Libraries

zoubworldArduino
Adafruit
The famous issue #11 introduced a 10% correction to the Adafruit library. Own measurements show the 25MHz Oscillator constant should be corrected 4,3% to approx 26.075.000Hz (without an additional 10%).