In this video, I will show you how to make 3.7 volt 18650 battery charger auto cut off with constant voltage & current, using very few components at home.

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Required Components For This 3.7 volt battery charger circuit.

1. MJE13005 Transistor or (Any NPN).
2. TL431 Shunt Regulator.
3. 2x 1 Kilo Ohms Resistors (1/4w).
4. 680 ohms Resistor (1/4w).
5. 47 & 470 ohms Resistors (1/4w).
6. Anode Bi Colour LED (Green + Blue).
7. Recommended to make on Pref Board.


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Circuit Diagram & PCB layout, Gerber Files Download link
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#batterycharger #18650 #Electronics #Circuit #Projects

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