> > Would it be enough to have an un-energised electromagnet, and short > > the ends of the winding together, so the induced current causes a back > > electromagnetic field? Probably work better with pole pieces on both > > items designed to form a more complete magnetic circuit than a disc > magnet. >=20 >=20 > What you are about to invent here is a damper that works on eddy currents= .. .... =20 Exactly, I figured it would provide exactly the sort of damping that Joe se= emed to be after. --=20 Scanned by iCritical. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .