12V Battery Checker Circuit

Posted on Feb 4, 2014

This is a 12V battery checker circuit that uses 3 LEDs that light up at their respective voltages. The red LED lights up when the battery voltage is between 8 to 10V, the orange one at voltages between 10. 5V to 12V and the green one when the battery voltage is above 12. 5V. This is a tried and tested battery checker circuit using one NPN and one PNP

12V Battery Checker Circuit
Click here to download the full size of the above Circuit.

transistor. A PCB is given along with the schematic.

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