"Gregory A. Parmer" wrote: > What's good enough depends alot on what you expect to do on the bench. > -greg And I'll agree with Greg... My bench is for ALDL (my converters) testing only. All I want is the PCM to start talking. I use a 15V power supply with 2 diodes dropping the voltage down to about 13.6-13.8 volts. The PCMs draw about 20 mA when talking to the computer. Just as a data point. ;) Andrew