How to Make Powerful 3.7V Lithium Battery Charger | Auto Cut-Off Battery Charger | Automatic Charger

 How to Make Powerful 3.7V Lithium Battery Charger | Auto Cut-Off Battery Charger | Automatic Charger

3.7v battery charger circuit with auto cut off

3.7v battery charger circuit diagram

3.7 volt battery charger automatic

Automatic 3.7 volt battery charger circuit

18650 battery charger with auto cutoff

3.7v battery full charge indicator

3.7v battery protection circuit

In this video I'm showing how to make 3.7 volt battery charger circuit with auto cut off on Full Charge.

For that i used TL431 Shunt Regulator, it's actually an adjustable zener.

I used mosfet which remains on by supplying small positive voltage using 1k resistor.

And cut off voltage is set at reference pin1 of TL431 by using resistors from both positive & negative.

When voltage in circuit reaches threshold point TL431 connects negative voltage from pin2 to pin3 so positive voltage at mosfet gate pin becomes zero and mosfet turns off.

In this informative video, we will guide you how to make 18650 lithium ion battery charger circuit at Home through the process of building a do-it-yourself (DIY) 3.7V 18650 battery charger that operates directly from a 220V AC power source. By following our step-by-step instructions, you'll be able to create your own customized charger

 How to Make Powerful 3.7V Lithium Battery Charger | Auto Cut-Off Battery Charger | Automatic Charger

3.7v battery charger circuit with auto cut off

3.7v battery charger circuit diagram

3.7 volt battery charger automatic

Automatic 3.7 volt battery charger circuit

18650 battery charger with auto cutoff

3.7v battery full charge indicator

3.7v battery protection circuit

In this video I'm showing how to make 3.7 volt battery charger circuit with auto cut off on Full Charge.

For that i used TL431 Shunt Regulator, it's actually an adjustable zener.

I used mosfet which remains on by supplying small positive voltage using 1k resistor.

And cut off voltage is set at reference pin1 of TL431 by using resistors from both positive & negative.

When voltage in circuit reaches threshold point TL431 connects negative voltage from pin2 to pin3 so positive voltage at mosfet gate pin becomes zero and mosfet turns off.

In this informative video, we will guide you how to make 18650 lithium ion battery charger circuit at Home through the process of building a do-it-yourself (DIY) 3.7V 18650 battery charger that operates directly from a 220V AC power source. By following our step-by-step instructions, you'll be able to create your own customized charger