> What you are about to invent here is a damper that works on > eddy currents Hi Barry, I'm sure I've seen this on TV used in railway sidings. And also sure it was somewhere in Holland/Germany. That was quite some time ago, maybe it's common practice nowadays Still tinkering, as holidays/family stuff permit Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .