automatic battery charger circuit diagram

Presented circuit is designed for automatic battery charger.  This circuit automatically turns off the battery supply as soon as the battery reaches its full charge level.

  Only one transistor BC547 drives this circuit.  The base of the transistor BC547 is connected to the positive pole of the battery by a 4.7k ohm resistance.  And a variable resistance 10k ohm is used to adjust the voltage level at the base of the transistor.  

Let's assume that the battery to be charged is of 12 volts. When fully charged, the voltage level of the battery rises to about 14 volts.  And with this, the voltage at the base of the transistor BC547 increases, due to which the transistor comes into switch on mode.  And with this the relay connected to the collector of the transistor comes to the on position and turns off the supply of the battery.

  The list of electrical components used in this circuit is given below.

<img src="image automatic battery Charger circuit diagram.jpg" alt="Automatic Battery Charger Circuit Diagram">

List of electrical components used in this circuit 
Transformer 
0-12v

Transistor 
BC547
 
Resistance 
R1 4.7k ohm

V/R1 10k ohm 

Diode 
D1 TO D7
1N4007

Capacitor 
C1 1000uf 25v

Relay 
12v


Location: Ramala, Uttar Pradesh 250623, India

Comments

North51 said…
did you build and test this?
30 November 2021 at 23:13
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