Interesting DIY project
Based on atmega 
http://www.ladyada.net/make/fuzebox/index.html
Take a look at the building section.. has a step by step.. we can learn a lot of that site to apply here
http://www.ladyada.net/make/fuzebox/index.html
Take a look at the building section.. has a step by step.. we can learn a lot of that site to apply here