look at atmel there are an Aplication Node (902 ?) with the AVR 1200 and
Software.
(next problem is to programm AVR 1200)
(i can give you the shematic)

Or follow the Links (Home Pages).

I have seen on some HomePage a PC-Programm which used the Printer Port.
Its the easyest way.

saschaspeedy@hotmail.com