I’ve had the parts to build one of these on my shelf for over a year – I thought it was about time I dusted them off and actually put the thing together.
I first tried it with some small ceramic magnets attached to a hard-drive platter. But this only put out about 7-10mV – which did not seem to be enough to get the switching function going.
Replacing it with a low friction bearing from a VCR, a plastic CD spacer and some “rare earth” magnets seemed to do the trick.
The iron coil attracts the magnet, but then when it draws level it generates a trigger pulse that switches on the coil – this reverse magnetises the core and pushes the magnet away. The cycle then repeats with the next magnet.
Basically this is a super-efficient motor.
But it’s rumoured to be the basis of a zero point energy device as well…
[Cue Twilight Zone Music]