Reviewing Pulse Motor Circuit Ideas and Theory

[TinselKoala]

555-based Pulse Width Modulation circuit:

[TinselKoala]

Simple PLL VCO circuit with "resonant detection" LEDs:

[verpies]

Simple PLL VCO circuit with "resonant detection" LEDs:

But the phase comparators are not used and the VCO does not track the resonant frequency of the coil

[TinselKoala]

But the phase comparators are not used and the VCO does not track the resonant frequency of the coil

Yes, that's right. I should have elaborated more. That circuit is used to determine the resonant frequency of the coil, by manually adjusting the potentiometer which varies the frequency of the VCO. When the resonant frequency is reached both LEDs will light up.

Here's the full implementation of the PLL used in my TinselKoil IX:

[earthbound0729]

Thanks TinselKoala for posting your hard work for us to enjoy. I appreciate that very much.
I think this will help many of us as we build and test our coils in this manner.

earthbound