Doug Williams 
PDA Robotics [PDF ebook] 

PDAs and robotics come together in this innovative resource! Here is the ONLY BOOK to provide in-depth designs and concepts on how to create a robot that utilizes your PDA (Personal Digital Assistant) as the remote control—or "brains." * Allows any PDA to communicate with and control the robot * No connectors necessary—works on a wireless link between the PDA and the robot * Requires only inexpensive, off-the-shelf components * Modules can be easily customized for individual use * Covers specialized software, control circuits, and interfaces ideal for creating artificial life forms