Aniket Singh

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@aniketxai

I’m a Full Stack Developer and IoT/Arduino Innovator. I build smart web apps and intelligent devices. On this site, I share coding tutorials, tech projects, and blogs related to web dev, embedded systems, and startup building.

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How to make lithium ion battery charger circuit

Hello Guys, In this post we learn how to make lithium ion battery charger circuit.

-Battery you charge like 18650 Li-Ion battery.

Lets start it:-

*specifications

-we charge battery like 18650 Li-Ion Battery.

-it works properly.

-it is cheap in price.

*Parts List:-

1.d882/bd139 Transistor

2.TL431 Transistor

3. 5mm 3v Led

4.1k resistor

5.680Ω resistor

6.47Ω resistor

*schematics and diagram

-connect all the components according to this diagram.

-connect input into 5v power supply and output into battery.

*Features

-when led glow full dark the battery will be full charge.

-when led glow light the battery will be discharge it require to charge them.

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