I am trying to make a tachometer for my car. The car ecu puts out at 5v square wave with each ignition pulse. (4 per revolution) I thought I could use the tutorials for the IR computer fan tachometer, but I dont understand the code. When I run the pulses too high, the terminal window gives me neg…

Tachometer project stalled

system November 20, 2012, 5:54am 3

Thank you!
I'll give that a try and report back.

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