This is a clone of the popular Adafruit 16 channel servo driver (the Arduino Adafruit Servo Controller library works perfectly with it). You can drive up to 16 servos, or use this as a PWM output to drive motors. It can also drive brightness on standard LEDs. Separate motor and logic voltage is available. We ship this with a shunt tying together motor and logic voltage (that's the way we use it in our projects) however you can simply pull off the shunt if that's not what you want.