Self running coil?

[NextGen67]

with a small mirror glued on the magnets and laser pointer you can amplify the vibration effect if exist .

great work!

A very good idea... Hopefully Luc has such a pen pointer laying around. Over a two meter range or so, this would be enough to visible show any effect. However, in such case also be sure to confirm and check the desk also for possible hum frequency (power line for example, or electronics inside the generator) which could cause the whole desk [and as such his magnet also] to vibrate.

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NextGen67

[NextGen67]

gotoluc

As you powered led with extra coil what stopped you from connecting led back to the gate of mosfet and closing loop then disconnecting function generator ?  Or using more pickup coils and power directly an oscillator chip driving mosfet ?

I think that is what we all trying to work at, and certainly Luc his goal. Tough at this stage, he can't feed that back, since he needs the right pulse frequency and duty cycle. In a while maybe :-)    Also for now -that is my opinion- I am more interested in the effect of the generators added energy. It will be a good idea to have a final conclusion about that first.

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NextGen67

[skywatcher]

Hi skywatcher,

are you saying that you get the high inductance when connected as per drawing?

If so, then this is what you want. Also, my tests have shown that there is a preferable side to connect the positive and negative, so this is why we are going into details on the drawing.

Let me know if you are not getting the high inductance value.

Thanks

Luc

If i connect it as it's shown in the drawing, i get the high inductance.

Maybe we have some confusion here... do you have 1043 mH or 1.034 mH ?
Somewhere there was 1.034 mH or 1,034 mH (but , and . for me mean the same: a decimal point).
Maybe we should use only . as decimal point and don't use commas as 'spacers' because that's confusing...
At least it's confusing for european people.   

But when you get the high inductance (about 4 times the inductance of one half of the winding) then my 'theory of operation' falls apart, and i wonder why it's necessary to wind it this way and why it will not work if it's wound in the normal way.

[forest]

I'm interested in values of capacitor used and coil inductance compared to frequency driving circuit in stable state and in excess energy generated.Is resonant frequency in harmonic relation to best working frequency from function generator ? I can't find exact capacitor capacitance in comparison to running frequency from function generator.

[gyulasun]

...
Maybe we have some confusion here... do you have 1043 mH or 1.034 mH ?
Somewhere there was 1.034 mH or 1,034 mH (but , and . for me mean the same: a decimal point).
Maybe we should use only . as decimal point and don't use commas as 'spacers' because that's confusing...
At least it's confusing for european people.   
...

@skywatcher

To make it quicker for you get answer, I can say it is 1043mH i.e 1.043 Henry, when the two coils are connected in series as shown in the latest corrected schematic, ok?  This is 100% sure. And it is WITHOUT the permanent magnets.
(Luc never mixed up the comma with the dot for indicating decimal point.
As you know, dot is for the decimal point in English. Sometimes it is mixed up, unfortunately, with comma.)

rgds, Gyula