> So - anyone have any ideas on how to scale a 0-90V source to 0-3.42V at about a third of an amp current, efficiently and compactly, and without requiring a seperate power supply? > > > Seems like the simplest solution would be found here http://www.romanblack.com/smps.htm Good luck -Denny -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.