Many thanks for your responce; Re-posted the question but not sure how to do this in the Forum?
Looking for simple program for a frequency trip using the 08m2 chip. i/p around 3 volts frequency range 0 - 3000 hz, trip setting example 1000 hz & 2000 hz.
At present I wish to make a simple ferquency trip, via a "magnetic pickup which gives 3 - 12 volts a.c. depending on the air gap" the project requires to sense around 0 - 500 r.p.m. & 2020 r.p.m as an example to disconnect the starter and then also shut down when overspeed reached.
I'M o.k. with the circuitry and can test using a square wave generator with i/p of say 3v as I have used 08m2 chips for many projects; it's just the simple programming I get stuck with for the correct instructions and read to P.C. Screen.