Engine speed governor

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I have built a small diesel generator but the mechanical governor does not seem to respond quick enough.I would like to build an electronic governor that will also have overspeed shutdown protection.

I have built a couple of simple electronic controllers for my biogas projects from schematics but I am certainly not an electronics tech.

The engine is from a refridgeration unit that was electroniclly controlled so their is a sensor over the flywheel for speed siginal to the controller.

If anyone out their can help with this project it would be very much appreciated.

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