Follow along with the video below to see how to install our site as a web app on your home screen.
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You wish to measure AC current.
Insert a low ohm resistor in the path. Read AC voltage across it. Current is calculated as V/R.
The resistor should be sufficiently high that you can just get a sensible reading on it, but not so high that it heats up dangerously.
That's the principle for quick temporary measurements. With some work you can duplicate the meter innards, and amplify the AC signal to create a DC reading.