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Simple Car Battery Charger -Naveen P N Click here for the circuit diagram
This very simple
circuit uses a transformer ,two diodes , a capacitor and an ammeter.
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
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
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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