On Apr 11, 2006, at 6:42 PM, Jinx wrote: > > 5V - 72V i/p linear regulator, 300mA o/p > > It, or something like it, sounds ideal for the application. > I need several supplies from an 8V - 30V i/p. I'm not sure I understand the point. You still have power dissipation limits that are the first thing you'll run into. They're probably aimed at things needed <50mA of standby power. BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist