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capacitor rundown on low draw Joule Thief

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I didn't show it in my last video so I'm doing this cap run just to provide the visual proof that it does indeed run from such low input.
this should be enough evidence that such a simple circuit would work well in testing various low power energy sources.
for some reason in the vid I say it has about 10 turns of wire but
it's more like 20. I would guess these toroids have a high permeability allowing for a higher inductance without having to wind
super long coils.
love the penny oscillator by Lidmotor and it has become my standard point of reference for making these forever-running low input oscillators, but it's good to know such a setup is not actually required. Lids penny I made ran for over a year straight from an old AA cell (could have kept going and going..) and that's sort of the little novelty I use them for, blinking oscillators that will seemingly never die.

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