The AD5263 is a digital potentiometer with 4 channels and very much alike the AD524X (single / dual channels). This digital potentiometers come in 20, 50 and 200 kΩ and can be set in 256 steps. This ...

This library is to control the I2C PCA9634 PWM extender. The 8 channels are independently configurable in steps of 1/256. This allows for better than 1% fine tuning of the duty-cycle of the PWM signal ...