My plan is to somehow switch a transistor to engage a white LED, which is bright enough to show the timing marks clearly. However this requires some kind of inductive coil around the #1 spark plug wire and the necessary electronics to get the impulse working well enough from that to switch the TIP120's base. (NPN).
I was wondering what might be needed in the way of coil turns, and additional transistors to amplify, or otherwise any other parts needed to tame the wild pulse (any pulse) coming off a plug wire. If anybody can suggest a route or contribute a diagram, would be super helpful. I made a mini-coil to wrap around the plug wire in a clampish sort of way, but there's no flick of my beast, and I could be sending > 5 V down the pipe too...for all I know. Or just .004 AC . I think it might need amplification. This is something I'm not experienced in.
A $5 timing light would be the do-it-your-selfer's pal. Any pointers to the correct path are welcome. I have tons of parts laying around, I just need a recipe, mostly for the impulse input circuit. (I think)