Cars engine rpm

Projects General Guidance
9

brunokc:
im making a arduino program to control a pnumatic gear shift. I would like to use rpm to switch gear automatically

its a golf iv with obd2.

Are your gear shift points going to be the same RPM? Most likely your optimal acceleration would not be the same RPM. Are you going to be down shifting with this setup? How does the pneumatic shifter work? Will the arduino be powerful enough to operate the pneumatic driver?

I think this is a fun project. As always, you accept some risk with not using a COTS solution.

I would start with something like this and a serial monitor to see what information you can get from the car prior to interfacing with the shifter.