r/AskElectronics • u/Patr1k_SK • 14h ago

Hall effect sensor driven tesla coil (concept)

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Could a tesla coil work with feedback via hall sensor as in this schematic? It would have to be started either by shorting the transistor or externally by a magnet. Please comment your ideas on flaws it may have or any improvements to this circuit.

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u/CatBoii486 14h ago

Maybe with a little delay. Idk, never was in the electromagnetic field

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u/NixieGlow 13h ago

Interesting concept! I believe the hall sensors won't go beyond some low kHz bandwidth and this concept won't work. If it did however, you wouldn't need a magnet to start it - the noise would start it up for you. Look for a thing called Hartley oscillator - it's basically what you did, but with a coil effectively used to detect the magnetic field and drive the transistor.

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u/Patr1k_SK 12h ago

Hartley oscillator doesn't work on feedback from magnetic field, it uses LC oscillation. I'm check what are the frequencial limits of hall effect sensors. And even if they couldn't handle high frequencies, I think the circuit should still oscillate on the highest frequency they can handle.