Hey everyone, I just got my arduino in today. I have played with them a decent bit controlling motors and servos and such. I actually programmed a few senior level mechanical engineering projects (not as impressive as it may seem at first) with them for my classmates. Anyway, I do not have a lot of electronics experience, but i have a general idea in my head. I want to make a jetski tachometer for a two stroke engine. If I wrap a coil of wire around one of the spark plug wires on the thing and use that as an inductor, will that give me a certain voltage back through that coil that I can read quickly with the arduino? I want to capture how many times i get a voltage per minute, and turn that into RPMs, which should be a one to one ratio on a two stroke, I believe. If you all don't mind, I would appreciate any help i can get. I do not know how to wire up a LCD screen for the future, but for now i can use my computer to read the output. Thanks!
EDIT: This is on an Arduino UNO. Sorry that I didnt clarify at first.