Electronic governor

Projects General Guidance
1

Hello just wondering if anyone can help me with a project that i am building. Its is a simple one. All i want to do is put a servo motor on a engine throttle and control it with a 10k pot, (thats all good i can build that) but what i want to do next is add a hall effect sensor to read the rpm so when the engine's rpm drops the hall effect sensor will move the servo motor to keep it at the rpm. So what i want is a electronic governor.

Moderator edit: Hijacked, off-topic thread split, title changed. AWOL

2

I'd look into the PID library. This will do he process control calculations. You feed it an error value (how far off the engine speed is) and it gives you a corrective output (how to set the throttle).