(07-21-2024, 09:01 PM)Mozart Wrote: Something really simple and easy done: https://youtu.be/DCZxl5sM7uo?si=5ubcWHo8U3LoVH7b
Best proof of concept I ever seen done with micro coils and is same with circuit attached except L3 which can be added as well using same inductors and diodes.
Some kind of modified Darlington oscillator … 2 stage amplification, almost same with Tesla patent.
What is good about this is the load regulates the bias of the trigger without having to waste it with a normal wasteful resistor that does nothing useful with the loss.
I have a joule thief for a while now that works with just two micro coils. Works fine.
In my experiments with this setup, I've found that using the highest frequency possible yields the best results. You want the feedback coil to be far enough away so that it doesn’t interfere with the nearly perfect coupled electromagnetic (EM) field of the primary coils. At radio frequencies (RF), you can place the feedback coil several feet away and still couple a significant amount of energy without disrupting the primary EM field.
In other words, the feedback coil shouldn’t negatively interact with the primary coils (L1 and L2), while still being able to induce RF energy, convert it into real power, and maintain the feedback bias power.