self powered fast battery tester


Posted on Feb 5, 2014

This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It has two ranges: when SW1 is set as shown in the circuit diagram, the device can test 3V to 15V batteries. When SW1 is switched to the other position, only 1.5V cells can be tested..


self powered fast battery tester
Click here to download the full size of the above Circuit.




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