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AC voltage and frequency monitoring

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binojkumar

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How we can monitor AC voltage(128-230-500-1k), any special circuit? pls help me
 

alexan_e

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what are the numbers 128-230-500-1k ?
what exactly do you want to monitor, the actual level or the existence of voltage?
What does the frequency have to do with it, will it be changing?

Alex
 

mister_rf

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You may use a small step-down transformer operating at maximum needed voltage, in order not have a direct electrical path from the power input side to the power output side.
 

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