On Aug 18, 2005, at 2:43 AM, Russell McMahon wrote: > Same issue with quiescent current of course, > but a brilliant idea for a low cost low current H bridge. Keep an eye on the Beam robotics folk, who come up with all sorts of interesting motor drivers. 386 based drivers are pretty common. 555 based drivers have been mentioned recently. I rather like the 74ac139-based driver, but it's a bit anemic for your application... BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist