Hey! Thanx for the link, Chagrin. It was very helpful. It shows that we can get sensors to behave just about however we need them. Now, a little more research to find how to implement this without an actual magnet.
Yes, Lefty, I understand the sensor is not "looking" at the gear wheel. I must have gotten confused with the switching mechanism of a CD ignition system. I know the term "Hall effect" comes up often in discussions of performance ignition and/or injection systems.
Now, tell me about these "reluctance speed sensors." I went out to another forum where they referred to the gear wheel and VR sensor, so I think we are on the right track.
And, to shed some light here, I am considering installing fuel injection on my riding lawn mower. Should make starting easier, maybe make some more power (but who cares, starting is the problem here).
Don't want to invest in a mega- or micro- squirt, or any other commercial, after market injection system, when the Arduino can handle it for a whole lot less money.
Thanx
Dave