How to make Simple Car Battery Charger

How to make Simple Car Battery Charger

Reviewed by: Kaelyn

On: 30 Okt, 2018

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Category: Schematic

Rating:
3.8

Rated 3.8 / 5 based on 448 reviews

This very simple circuit uses a transformer ,two diodes , a capacitor and an ammeter. To charge a battery just connect the + and - terminals of the circuit to the corresponding terminals of the battery.


When the battery is not charge...

This very simple circuit uses a transformer ,two diodes , a capacitor and an ammeter. To charge a battery just connect the + and - terminals of the circuit to the corresponding terminals of the battery.


When the battery is not charged, the ammeter reading shows 1-3 amps. When the battery is fully charged the ammeter reads Zero or nearly zero, after which the battery should be removed from the charger.


The circuit is a full wave rectifier using 2 diodes for rectification. The capacitor is used for smoothing. I think the circuit works fine without the capacitor since the battery itself acts a BIG capacitor. But when you are using the circuit to supply 12V (as a battery eliminator) the capacitor needs to be present. Care should be taken NOT to reverse the + and - terminals while connecting it to the battery

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