Arduino interrupt

[PerryBebbington]

@sander420 ,
Is this part of your main topic:

Controlling a high pressure gasoline pump with arduino

Hello everyone, I'm afraid this is going to be a long one so buckle up. I'm working on my final project for my bachelor's degree automotive technology and I need to put a standalone ECU on a Audi A1 1.4TFSI. a student last year did the install and first configuration of the ECU and stumbled on a problem: the high pressure fuel pump has a normally closed spill valve instead of a normally open spill valve. A picture of the difference in signal is shown below (longest signal being normally…

?

If so, they probably should me merged to keep the information in one place.

Thanks,