The Arduino Microcontroller is taking the DIY community by storm. I have seen Arduino projects everywhere lately! Have a look at some of the links below for some cool project ideas.

"Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It’s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Arduino can sense the environment by receiving input from a variety of sensors and can affect its surroundings by controlling lights, motors, and other actuators. The microcontroller on the board is programmed using the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino projects can be stand-alone or they can communicate with software on running on a computer (e.g. Flash, Processing, MaxMSP).

Tutorials:

• Makezine
• Instructables
• Hackaday
• Ladyada
• This other random yet very useful site."

Via: Hack n Mod