Here’s a really open-ended contest from Instructables: just use an Arduino!
Arduinos are awesome – with one simple controller, you can make almost anything! What new things can you make with Arduino? We’ve teamed up with the creative folks at Evil Mad Scientist Laboratories on an Arduino contest to find out.
The rules are simple: to enter you must make a new Instructable that involves the Arduino IDE. You can use any hardware that you like, or none at all. Be sure to provide the code you used so that others can follow in your footsteps. Make something amazing and win a sweet Meggy Jr RGB from Evil Mad Science or an Arduino Mega to power your next project!