DIY
Get flash to fully experience Pearltrees
If you're at all like me, you learn best by example and by doing. If that also sounds like you and you're interested in the popular AVR microcontrollers, this tutorial should be right up your alley. The goal is to get you up and running as quickly as possible, so you can get to exploring and modifying on your own without having to fiddle with hardware, software, parts, or settings.
I Make Projects - A Tutorial for Starting with AVR Microcontrollers