[PeterH]

Hi there,

I have two questions related to running my factory installed tachometer in my Geo Tracker.

1. what sort of signal does it take to drive the tachometer? I'd like to generate a signal of the right type to drive this during setup and testing. Guessing I might use an Arduino board to generate a signal.

2. How do you tell the proper number of pulses per revolution approprate for the tach? This Tracker had a 4 cylinder ICE motor before I started this project.

Ok, maybe I have three questions... is there an easy way to accurately measure the rate my motor is turning, other than using the sensor? I'm looking for some way to confirm that all my instruments are accurate. I'm picturing that ancient strobe light we used to use way back before electronic ignitions, to adjust timing on ignition.

Thanks,
Pete