On 17/08/2011 16:26, RussellMc wrote: > So you may want to place a diode from psu output to dummy load and > then take load from there. I nearly mentioned that too.. If the PSU has remote sense or easy to=20 find feedback you don't even change the O/P volts --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .