This is from @setenta9 I've been helping with the code part, but I'm not good enough with circuits to help with the wiring part. He has a tach signal and needs it cleaned up enough to use as a interrupt signal to get engine RPM.
corte RPM2.zip (2.0 MB)
The signal you see is the one the car delivers from its own rpm signal. That signal that I show you is obtained directly from the cable that the car has for the tachometer and comes directly from the original ignition coil of the car. Unfortunately, it is a very noisy signal.
The E part is the ignition coil
The A part is the conector for the tacho
The P part is the crank sensor
The crank sensor gives the correct ignition signal to the coil
Hopefully someone can help straighten him out on what he'll need to turn this into something he can use.
Manu thanks in advance!!