Self running coil?

[Magluvin]

So what some may be speculating is that at resonance, the circuit is using no power and collecting from the 555 pulses through the gate to bring the cap voltage up.    Do you have a resistor between the 555 out and gate?

Mags

[gotoluc]

That is a very interesting explanation Gyula

Thanks for putting all this together.

Is the IRF840 also the same capacitance?  because I get the same effect with it also.

Looking forward to further explanations.

Thanks for your help as usual.

Luc

[gyulasun]

...
I made a new video to further explain the the importance of the Frequency, Duty Cycle and mostly the Permanent magnet that without it there is no Frequency I ever found that will create this effect.


If we think about it ...  I only remove the magnet from the toroid coil and it starts to use current, so how can the energy that was going back to the source of been coming from the MOSFET gate pulse and now suddenly stop???

New video: http://www.youtube.com/watch?v=7Fb5FOfme1g
...

Hi Luc,

Just watched your 3rd video and now I think I know why you have a flat current line during the FET on-time.
It is explained by the resonant circuit high impedance: THERE IS current but very much less than say in the case of the 10 Ohm resistor.
And when you drastically detune the LC circuit from 18.8 or so kHz, by removing the magnet, the high impedance immediately gets reduced and current is taken from the capacitor (or from the battery if it is connected).

rgds, Gyula

[gotoluc]

So what some may be speculating is that at resonance, the circuit is using no power and collecting from the 555 pulses through the gate to bring the cap voltage up.    Do you have a resistor between the 555 out and gate?

Mags

Hi Mags,

no I don't have one. I can add it. How high of value can I go?

Luc

[Omnibus]

Hi Luc,

May I ask you what kind of a scope are you using?