Auto battery current analyzer

Posted on Mar 13, 2013

This op-amp analyzer can measure the current drawn by any device in a car. The analyzer works by measuring the very small voltage that develops across the battery cables when current flows

Auto battery current analyzer
Click here to download the full size of the above Circuit.

To calibrate the unit, measure the current flow somewhere in the car with an accurate ammeter, then adjust the analyzer for that current reading.

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