This page was so hopelessly out of date that I decided to take it down.
Check out the following articles instead:

  * http://lcamtuf.coredump.cx/gcnc/ - my guide to CNC robotics
  * http://lcamtuf.coredump.cx/rstory/ - a photoblog of my adventures with robots
  * http://lcamtuf.coredump.cx/electronics/ - a primer on electronics

You may want to have a look at this guide, too:

  * http://www.societyofrobots.com/step_by_step_robot.shtml