On Nov 20, 2006, at 2:03 PM, Mike Hord wrote: > ALL of the energy here comes from the bump the person starting > the system provides. And you're assuming good faith. That the large capacitor isn't charged from an external power source to start with. That none of the bulky components' (caps, coils) main function is to conceal a battery (they're certainly much larger than would be needed to store the magnitude of pulses you'd expect from the known physics of the pieces...) That the thick wooden base is actually solid wood. That the thick (!) wires are really wires that go where they appear to go. I vaguely recall an "electronics project" where one made an "impossible machine" that capitalized on some of these "oh, it looks like an X, it must be an X" sort of misconception. BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist