Battery Charger is a very useful device nowadays, through this, we can charge any type of battery such as Lead Acid Battery, Lithium-ion Battery, Li-po Battery, etc.
Here the charging voltage of batteries doesn't create any problem because there is a potentiometer that controls the output voltage. Through this, you can set the output voltage as your battery needed.
What is a Battery Charger?
A battery charger is a device or Circuit through which you can recharge your desired battery at any time. It is all one battery charger means you can charge any volt battery through it.
Simply set the output voltage according to your battery. By just simply rotating a Potentiometer and connect your battery to the output wires.
1) 2n2222a Transistor
2) 12v Relay
3) 2x 1k, 10k Resistance
4) 10k Potentiometer
5) 2x 1n4007 Diode
6) 10uf Capacitor
7) 2x Led