Hans Otten likes to use ATmega chips in conjunction with the Raspberry Pi. To do this, he has purchased two boards: the RasPiO Duino and the Gertduino. He has extensively reviewed the two products over on his blog and has also given instructions on how to get them working. He comes to the conclusion that the RasPiO board is the better one, because it is simpler, better designed and, crucially, better supported by the creator. The RasPiO Duino is available from Alex Eames’ website (as well as other vendors such as The Pi Hut) and the Gertduino is available from CPC or Farnell.

Photo credit: RasPiO Duino by Alex Eames