Rob Douglas from Vanderbilt University gives us a step by step walkthrough of his mechanical dry-erase whiteboard project, much akin to a larger scale, computer driven, Etch-a-Sketch. The site contains the step-by-step process of construction, a list of all components used as well as suggestions for improvements, and the source code (written in C#). Check out his project for a good usage example for the Phidget High Current Motor Controller, InterfaceKit and Analog Joystick sensor, and Servo Controller.