how to make a 4V battery charger [Automatic Battery is Fully Charged] Sekhohub.online

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Hi friends, in this POST I have made a 4V battery charger. It is made using common and easily available components. It has an auto cutoff feature, which protects your battery from being overcharged. I hope this video will be helpful to you. Please like and share.

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Materials for the Project.

1- 1X BD139 transistor

2- 1XBC557 transistor

3- 2X BC547 transistors

4- 2X 100 ohm resistors (1/4 watt)

5- 4X 10K ohm resistors (1/4 watt)

6- 1X 1N4007 diode

7- 1X 10K variable resistor

8- 1X red led

9- 1X blue led

10- 1X 100uf 50V capacitors (electrolytic)

11- 1X 5mm dc female jack

12- vero board

13- jumper wires

14- 6V power supply

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Download Circuit Diagram