Robin2:
You have not told anything about the nature of the output from your RPM sensor or the input to your servo valve.Assuming these are simple things then the job should be within the scope of any Arduino.
...R
I have to do some research for that. But the rpm speed sensor is a like an automotive rpm speed sensor. Mostly they are of the hall effect type. For the servo valve I also have to do some research, but I think a voltage output is equal to a stepper motor position or rotating to the next position.
My question is rather: if I buy an Arduino, is it like connecting some wires and programming the right software? Or do I have to add components to the PCB and build it myself?
I hope it is like my first suspection. If yes, what Arduino would be the best for me?