I am building a POV bike light and am quite far on in my project. My aim is to program the ATMEGA168 chips on my Arduino Duemilanove and then move the chip to my new circuit which will be fitted to the bike. I've built a first prototype taking signals from the duemilanove board and it works fine.
I've also built a standalone Arduino on a breadboard and that seems to work fine too. I've made up my new circuit board combining both aspects but when I take the chip that works with the arduino/breakoutboard and plug it into my combined board nothing happens and the chip seems to be fried and will no longer allow to upload sketchs to it once i put it back in the duemilanove.
I've checked again and again that my new circuit matches the breadboard arduino layout and the working breakout board but i've no clue what to do next. What am i doing wrong / what is wrong with my new board that can fry a ATMEGA168 like that?
Any help would be much appreciated,