Developer page to make a simple, cheap board for TimingLight

Much cleaner and resource (time, ducttape, LED :-) friendly than if everyone solders their own Eiffel-tower type circuits in air.

Base is TimingLight but minor difference:

The active-high input option makes it possible (see GenBoard/Manual/DDFlyback) to check if injector is actually present and solenoid firing (mechanically it can still be stuck). With no injector present, the injector output voltage can not go above VBatt potential. For this, the timing light ground must be placed to VBatt and an extra battery is needed to power the timinglight board.