Motor Bee. (USB --> 4 DC Motors AND a Servo) Control up to 4 DC Motors and a Servo from a single USB port. Including motor direction and speed control. Comes complete with "Motor-Way" software providing full control without the need for programming. A DLL is also provided allowing you to write your own programs very easily. (MotorBee also has 4 digital outputs and 6 digital inputs which are ideal for limit switches).