I want to play around with driving an engine's ignition system using an Arduino. That is, I want to build a TCI with an Arduino. I'm doing this on a 1982 Yamaha Virago 920 engine (v-twin). It has two pickup coils to know the crankcase position when it needs to fire.
So mainly my question is, how do I read the pickup coil signal from the Arduino? I'm an electronics circuit noob, so extra explanation about how circuits work (or just links) would be much appreciated.
In the wiring diagram, each pickup coil has two wires, and the coil is displayed as a little spring icon. I don't think it's a hall effect type sensor, but I'm not really sure.