Posted on Sep 4, 2012

This circuit measures the power -supply current of a circuit without really having a currentshunt resistor: R1 is only 3 em of #20 gauge copper wire. A length of the power distribution wiring can be used for Rl.

Click here to download the full size of the above Circuit.

The MAX420"s CMVR includes its own negative power supply; therefore, it can both be powered by and measure current in the ground line.

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