Negative Inductance and measure of Magnetic force.

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The "Monopole" magnet piston has two Neo discs attached to a ferrite rod that sits to the outside of the coil face. I tested the throw with a polarity reversing switch on the transformer. Plenty of force to pressure the switch spring down.

video;

https://youtu.be/yUqw3QwO_eU

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The threaded tubes were cut from a toilet replacement set. They snug fit the the SPDT switch, leave plenty of room for the magnet piston to travel freely and fits through the air core of the power coil:

raw

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First SPDT micro limit switch "H' bridge reciprocating oscillator:



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Part of Tinselkoala's extravagant current reversing grotesquery:



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It's alive and purring.