Automatic Throttle Adjuster
This microcontroller is meant primarily for trains, but I'm sure you could edit it to fit any kind of vehicle if you wanted to.
How to use:
1. Hook up your train's Wheel Slip output to the Wheel Slip Input
2. Hook up your RPS output from your engine to the RPS Input
3. Hook up the Throttle Up/Throttle Down to a throttle lever, to which I highly recommend turning down your sensitivity on your throttle lever before testing
4. Test and modify the settings if needed
How it works in a nutshell:
1. When the engine is fired up to a certain RPS, the throttle will start to be pushed forward until it receives a wheel slip input
2. When a wheel slip input is received, the throttle is pushed back down until there is no wheel slip
3. After a specified amount of time where there has been no down output and no wheel slip, the adjuster tries pushing the throttle back up once more, and the cycle repeats while the engine is cranked