Battery Free LED Flashlight Driver – SJR Looper V4

I have made some more progress with the SJR L circuit. I have some more pot cores coming to test different sizes and materials. I think I need to go back and test using the copper foil within the coil instead of the air capacitor. Those of you who have followed this project will know what I am talking about.
Schematic coming soon at:
Ready made prototypes at Tesla Maker:

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