The bifilar pancake coil at its resonant frequency

[MileHigh]

Well, almost. In reality all real circuits will have some stray capacitance so there will be some ringing. You can see this slight ringing in Jeg's scopeshots. But less sensitive instrumentation -- like my LED      is good enough to show the truth and demonstrate the principle.

(snip)

Agreed, but he is running really fast.  A larger coil and a much slower clock would reduce the ringing to small patches of peach fuzz.  Plus no schematic so who knows what the hell is really going on.  Wherever the current viewing resistor is it looks like it is not seeing the coil current after the switch-off.

[Zephir]

the problem with you Zephir, is that you are trying to get people to believe you have a cat, when you are talking about your stuffed toy teddy bear

I never claimed anything about me. It was you, who said, that overunity is impossible. My person is completely irrelevant for this claim. The problem with you is, you're disrupting the topic of this forum with such an attitude.

[MileHigh]

Repost for the alternative Big Thinkers so this doesn't get lost in the shuffle:

We know that a flywheel is equivalent to a coil.  So what about RESONANCE, when a coil is resonating at its resonant frequency?  How does that relate to a flywheel?

i.e.; The brass pancake flywheel at its resonant frequency.

If you really can describe a flywheel self-resonating then what is so special about a coil self-resonating?  But can you do it?

[Zephir]

Resonance is classical physics phenomena and it doesn't explain overunity (being itself based on energy conservation laws). In general, if you can derive something with using of classical physics models and laws (which disallow overunity), then you can be also sure, it's irrelevant to overunity mechanism. The reason why the resonance is still significant for many overunity circuits  is, it minimizes the impedance of circuit and thus loses of energy in it.  Many overunity effects are depending on amplitude of oscillations, which gets maximized in resonance frequency.

[Jeg]

Thanks Guys. One more question please.
You said that when switch opens, current continues moving the same direction across the coil and lights the led. Then wouldn't our secondary show a negative value and then a more negative peak? I am referring to the yellow waveform of mine which is the secondary's voltage output. Obviously that is not happening. Why is that?