"It throws away voltage regulation, too" I don't think his 'app' is going to care about a percent or three 'sag' in output voltage ... he isn't trying (nor does he need to) regulate within .1% or anything close to it. Design to spec and requirements - and no more. To do so is to throw away both time and money ... RF Jim -- 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