In this Circuit, we show you how to make a Battery Polarity Checker Circuit. Here we used simple diode concepts for making the circuit. There are 2 LEDs used in the circuit. One RED LED, One Green LED. If You connect in the correct polarity then Green LED turns on. If you tie in the wrong polarity then RED LED Turns on.
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Schematics:
Here is the Schematic of the Battery Polarity Checker Circuit