I just poped a new ATmega328 into the Arduino Duelmilanove and it does not work. Anyone know why? Thanks.
Hi,
did you know that you need an Atmega328 that is already pre-programmed with the Arduino bootloader? They are sold by most of the usual Arduino hardware sellers.
If you have access to a Hardware Programmer you can do this yourself from the IDE. It has a menu-entry "Burn-botloader". This has to be done only once for each atmega, so its Ok if you just know somebody who has a programmer and is willing to do this for you.
Eberhard
If you have some very basic material, you can google for Arduino and Bit Banging - or jsut have a look her:
http://www.geocities.jp/arduino_diecimila/bootloader/index_en.html#top
Works like a charm!
EDIT: You might want to use the ADABOOT boot loader, which can be nicer to use 
I see that page referenced often. Does anyone have information on how to apply this to other boards (i.e. BBB from Modern Device, etc.)?