Here is the information how one can make a device self powered if have good luck with Kapanadze/Tesla resonance but not only. A 'flamenco' solution may be used, that means another multitapped transformer to energize points on the PCB. If you haven't yet succeed with Kapanadze coil or making a self powered device, this may work well.
I've added a corrected image. Resistors in series with diodes are necessary.
https://www.youtube.com/watch?v=4RxBBFnzcq0
2k is probably better for extra grounding than 1,5k.