Make:
Make: Arduino Bots and Gadgets - PDF
Invent your own embedded gadgets and apps with an Arduino and this informative book.
Want to build your own robots, turn your ideas into prototypes, control devices with a computer, or make your own cell phone applications? It's a snap with this downloadable book and the Arduino open source electronic prototyping platform. Get started with six fun projects and achieve impressive results quickly. You'll gain the know-how and experience you need to invent your own gadgets.