hi All,
I am trying to design a comparator where the max voltage on the PCB is limited to 5v.
I am trying to compare an ac voltage when it drops below 32v but not sure how to set the reference voltage. here is a schematic i had come with but not sure how to move forward with a reference voltage. I had designed it after several iterations where the ac voltage was way below 2vac. Now managed to bring the voltage up 30vac. This a a followup from my previous
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the comparator should work like this,
Below 33 - HIGH
Above - LOW
got this when voltage at the primary of the MOT (load) and 26vac when the secondary are shorted.
so 26vac is 16.5vdc and divide it by 5 gives a 3.3v which i guess should be the reference voltage ? and 33vac is 20.9vdc and divide it by 5 is about 4.1v
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Seem to have partially got it, at 26vac vout should read HIGH but its low and at reads LOW above 30, which it does.
Seem to have partially got it, at 26vac vout should read HIGH but its low and at reads LOW above 30, which it does.
