Permanent Magnet: ON/OFF Mechanism...

[gn0stik]

Ferrite is an iron based magnet(fe). So that may yield interesting results. However the author is indicating that it IS possible to do it with other types, so it probably has nothing to do with the conductivity. NdFeBs are composed of Nickel and Iron mostly so those are probably pretty conductive as well. Also you can get neos without the metal coating, some come with a black epoxy or rubber, which would be easy to remove a small amount for contact points) coating as well. I'll see if I can find some.

[Liberty]

This is an interesting conversation to read at this web site:

http://www.rexresearch.com/mra/2mra.htm

This was very interesting too...  Perhaps iron wire would be useful here???

Joel:  This morning before going to work I spent a little time and wound a 200 turn coil on the 3 inch long permanent magnet (alnico and placed this coil inside of the larger coil (same as the coil I gave you). When this permanent magnet core coil is driven with my signal generator (.5 V output) at exactly 174.9 KHZ the output coil will light up a neon tube. If you get off this freq nothing will pass through the transformer for the permanent magnetic field cannot be overcome by the "feeble" input. Need some more investigation here. My intent is to drive the input coil at a freq that will cause a difference (beat) freq of 60 HZ between the input freq and the ferromagnetic natural resonance freq. More later.   ~  Norm
PS: with .5 V input I am getting out 60 V

[TheOne]

we can probably use the sound card output of a computer to create this kind of frequency more easyly?

[TheOne]

hum finally i dont think the sound card idea is good..

[gonzalezjawc]

We can use the same metal coating, just cuting the coating where it is not necesary to isolate the plates, then using normal epoxy to prevent magnet to brake.