Last weekend, I’ve been playing with a RC servo to automate the recording of wsrradial plots. Metlstorm has presented a solution to do this with Lego Mindstorms, but I present a solution if you don’t want to use Lego components.
RC servos are easy to find, and you can find many servo controllers for PCs (a typical RC servo is controlled with a PWM signal). Though most RC servos though are limited to 180° rotations, there are 360° servos on the market.
Here is a picture of my 360° RC servo, togheter with a servo controller.
The servo in action:
Didier Stevens 