Well, you can geographically/mechanically isolate it, but battery negative (hence the trigger/pcb) will be electrically connected to the engine frame.I want to isolate coil and PCB from engine frame.
Won't the hardest thing be to find a COP that will work on 6V? And one that won't burn out with the very slow RPM and long dwell time of a hit and miss engine?I am looking for a circuit to fire a COP coil with 6 volts DC