USB controlled robot servo picture

The project was design to allow you to controll standard hobby radio control servos via a PCs USB port. This circuit can controll up to 6 servos powered with 5 v and can hold a load of maximum 3 Amps, so you should be careful your servo’s dont exceed the maximum load. The AVR microncontroller is powered directly from the USB port, but it takes an external power supply between 7 and 30 volts to power the servos.

USB controlled robot servo: [Link]