hello Bob,
I have found, while watching the oscilloscope, that the point of the circuit first starting to oscillate is the spot that charges the battery fastest, I presume because the frequency is much higher than with the rotor, but also the amplitude potential of the spikes are still very high. And at this point it is still drawing about half of what it would with the rotor. I'm not sure if this is the same sweet spot as yours, and the one you have been describing, but this is what i have noticed. I haven't experienced any overheating issues yet either, but that is probably because i have been using the same batteries.
Also i have notice that when charging and object, what ever it is, the tone increases as the object charges, so I predict that the rate of charging decreases as the battery (or whatever) gets charged more, like a logarithmic graph, probably until the circuit stops oscillating when the object is fully charged. and this maybe could be counteracted by changing the resistance periodically.
I was curious if my predictions are correct and if you have noticed anything similar to this.
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