[time-nuts] Re: Another reason to monitor line frequency :) - My AC measurement project & question

[Keelan Lightfoot]

I was pondering this recently. But then I realized something: Sure, something like this would eliminate the transformer… in your house. But there’s still a transformer out on the street somewhere, then another in a substation somewhere, then another in a bigger substation somewhere, then another…

- Keelan

> 
> You can use a capacitorsget your galvanic isolation, and a CR voltage divider with minimal waveform distortion. Pick a burden current (say, 1 mA) and for 120V line, you need 120k impedance at line frequency 60Hz