Ion Current Bias Generator PCB

Have completed the ion current bias generator PCB. Need to source components.

Ion Current Bias Generator

Research on ion current sampling and producing the bias voltage has led me to design a circuit I think should work to make around 100V across the spark gap after ignition. This design uses the back EMF from the coil primary winding after ignition to charge a capacitor in parallel with a zener diode to the bias voltage. The excess is allowed to discharge away to ground through the zener.