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Reply to "PSX1-AC"

@gunrunnerjohn -Nope, no uP for critical systems.  However, I will use a uP to do ADC to send to the RF...probably off of a buffered output.  Man, going to make me cough up all my trade secrets.  I'm using a Delta Sigma RMS to DC Converter.  Trip points would be set with potentiometers with detents.  I'd leave C3 out all together.  It's either a remnant or the location of that op-amp requires some signal smoothing or the 8V isn't very clean or I have no idea.  I would have used two capacitors on the 8V regulator output btw. A

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