Hi, > I think you can start by building an experimental board with a AT90S8535, > ATmega163 > or similar. Then add a 16 bit DAC (I built mine with 2xHC574 and a resistor > ladder)... I would be inclined to go for the MEGA16, its faster (16MIPs) still in DIL format and has enough code space (double that of the 8535) Paul