more fully.
zcd is NOT particularly useful for this project since it cannot drive a timer gate directly or be a capture source for any of the pic chips that my crusty old version of proteus can...
i'm guessing the signal is impressed on to the power line in a "balanced" phantom cailho style. i don't know how to simulate that or how to extract it properly either in any simple way with proteus ....
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Re: FSK demodulator in firmware
more fully.
richard - 13th October 2025, 05:48zcd is NOT particularly useful for this project since it cannot drive a timer gate directly or be a capture source for any of the pic chips that my crusty old version of proteus can...