So it's becoming too complicated to use linear regulators and stuff to create a power supply. I've just decided to go ahead and use a switching supply. TPS63020 This one: http://focus.ti.com/docs/prod/folders/print/tps63020.html What do you guys think? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .