How To Change Negative Volts To Useful Positive Voltage From A Pulse Discharge?

[russwr]

Help wanted designing automatic circuit possibly with a separate switch, using directing diodes, blocking diodes, as zener or regular, for discharging negative charged capacitor OR Inductor coil, to resistor load with positive volts? Current passes through minimum initial 12v zener to charge coil/capacitor negative to positive ground. Other circuit is in positive sense to negative ground, and waiting for the extra volts charge.

There is a U.S.Patent for discharging left over energy on capacitor from small power supply to improve engine combustion. (that only uses CDI unit) The 300v discharges down, leaving 50v on cap. That left over energy is carried through diode to spark plug cable. That was called "front end" capacitor circuit. "Back end" circuit used PF capacitor across the spark plug.

My question has to do with wasted energy only, not from Power supply. Induced waste magnet energy generates 130 negative volts , that must be converted to positive volts. There used to be a small circuit board advertised about changing polarity.
The problem I am trying to solve is to utilize existing minus 130 volts from magnet induced voltage into it's wire coil inductor to positive ground, and to change THAT, into positive volts for a second circuit. Discharge is a voltage pulse, not AC. Bridge rectifier is for use with AC only.
Maybe there should be a small capacitor, directing diodes, zener or another millihenry inductor to get coil back EMF that is positive? A small boost voltage converter utilizes reverse charging of capacitor, but that is an added on power supply. I already have -130volts.

The old style millihenry Primary ignition coils had associated distributor contacts gap with parallel condenser capacitor rated for 600v. The input was only 12v DC, and Resonance of C + L increased the back EMF out to 250 volts .

(2) 9v batteries can make a plus + minus power supply with common terminal . I can still use 1/2 the negative voltage, if divided up and positive.
There is no schematic diagram ,- asking for circuit options?

[NathenLegros]

Hello russwr!

To study accurately, you first need to learn about the Operating Principle: ZD12 controls the threshold only when the capacitor voltage reaches above 12V it conducts current. And Q1 is the discharge switch when the Zener leads to turn on the transistor to connect the capacitor or inductor to the load.

Note when designing: you need to choose the type with the appropriate capacity because the discharge current through the zener Squid Game Online can cause heat.