> Hi Picdude- > > I have to disagree with Mike, its ok to connect like you propose AS LONG > AS the power supply and PIC circuit are otherwise isolated. > > I have done this myself. I used a 12V car tail-light as a 5V ballast. > I also transferred the fan from the 12V supply to the 5V supply, which > made it much less noisy as I don't think heat will be a problem at 120 > mA ;-) I'd have to agree, many power supplies deal with the "no load" issue, and the ones that don't do not need a load anywhere near 50W to be usable. Only way to know for sure on a particular supply is to try it out. I regularly use an old AT power supply as my "breadboard" power supply. TTYL -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics