PCA9685 Contains an I2C-controlled PWM driver with a built-in clock; Power supply voltage is DC5-10V It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages). Supports using only two pins to control 16 free-running PWM outputs ¨C you can even chain up 62 breakouts to control up to 992 PWM outputs. 3 pin connectors in groups of 4, so you can plug in 16 servos at one time . 12-bit resolution for each output - for servos, that means about 4us resolution at 60Hz update rate