This is a simple design and straight forward battery charger circuit. That circuit can be used to charge all type of 12V rechargeable batteries including car batteries. This is the figure of the circuit.
The circuit is nothing but a 12V DC power supply with an ammeter for monitoring the charging current. The two diodes forms a centre tapped full wave rectifier .The capacitor filters the rectifier output to produce a clean 12V out put. Always be careful to connect the charger to the battery in correct polarity. Positive to positive and negative to negative. When the battery is fully charged the ammeter reading will be zero. As the battery is slowly charged the current slowly decreases. At initial stages of charging the ammeter will read about 1 to 3 amperes.
The circuit is nothing but a 12V DC power supply with an ammeter for monitoring the charging current. The two diodes forms a centre tapped full wave rectifier .The capacitor filters the rectifier output to produce a clean 12V out put. Always be careful to connect the charger to the battery in correct polarity. Positive to positive and negative to negative. When the battery is fully charged the ammeter reading will be zero. As the battery is slowly charged the current slowly decreases. At initial stages of charging the ammeter will read about 1 to 3 amperes.
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