4PC PCA9685 16-Channel 12-bit PWM Servo motor Driver I2C Module Arduino Robot 4x PCA9685 16-Channel PWM Driver Modules. Expandable Setup: Multiple modules can share a single I2C bus, allowing you to expand your system effortlessly. Interface: I2C (clock speeds up to 1 MHz). Number of Channels: 16. byJuly 3, 2026