Originally posted by ren
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Yes, it is a 12v PC fan converted as per Imhotep's instructions and a charging output. I cannot see how it can resonate it it's present form, I have an extremely fine adjustment on the Base/trigger input and when i slow it down i can clearly hear the windings 'click' until the motor is running so slow that the coil output is too weak to energise anymore and so the motor stops.
No amount of adjusting with pot resistance/Base trigger can possibly make it resonate from this situation as the coil simply isn't energised until it rotates. I am using a 12v input battery.
If you can add any thoughts on this, I'm a good listener, [ I just need to get my hearing-aid batteries re-charged [ha, ha :-]
Thanks for your interst Ren, I LOVE your window motor, beautiful.
The 25 ohm rheostat resistor that I'm using as a voltage/current control on the source battery helped matters to. Good luck.
I was surprised. I have always thought that you could not close the loop like that. I am going to leave the LB hooked up like that. It makes the whole thing alot easier. I set it up like you said so that I can still use the unit as a charger when I want to. The little battery pack will run the light for 4 hours now between charge ups. That is enough for me. Us 'old folks' go to bed pretty early these day.
Finally I got tired of it and just did something else for the day.

, Take a large self-inductance and charge it with an electric current in this case we can say the energy has been stored as a magnetic field.Then when the coils current is disrupted the magnetic field collapses and an inductive discharge develops across the coil leads----which is what you have been doing. But you have "two" leads from the HV coil, one is under a compression (the negative) and can be considered a source seeking a sink, the other highly expanded (the positive) can be considered as a sink seeking a source. This is different from what we have been taught because Faraday was wrong in believing the positive terminal of a battery was a source, He was corrected but the textbooks were not which is why I use electron flow notation where the negative terminal of a battery is a source and the positive terminal is a sink. Bill Beaty has an excellent website which deals with the issues of "what" electricity is and the misconceptions we have.
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