ESCON 36/2 DC is a 4-quadrant, digital PWM servo controller for use with dc motors up to 72 W. Drift-free yet dynamic speed behavior enables a speed range of 1 to 150,000 rpm; fully configurable ...

While the USB-powered Atmega8 he used supplies the necessary PWM signaling for all of the servos, an external power supply rated up to 30v at 3A is necessary to provide the 5v of power each servo ...