on video How To Make 12V Auto Cut Off Battery Charger Circuit

 an excellent battery charging circuit. You have never seen this circuit before, the circuit automatically cuts off using the reference voltage created by the zener circuit. The design belongs to me,

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In this video i have made 12v auto cut off battery charger circuit without relay instead i have used current (shunt regulator 431) that shuts off current at output when crossing 13.4 volts,
Thus protect and prevent battery from over charging.
You can increase or decrease cut off by changing 1.5k resistor.

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