Here is the first step in designing a robotics daughter-board (the RoboShield) for the Arduino microcontroller. I’m just laying out the components and marking things up in Sharpie to get a feel of how to use space on the tiny little board (it’s about the size of a business card).
Once this is designed and tested it will greatly simplify building the Ard-bots we use for the Arduino Robotics class.