Sunday, August 24, 2014
Simple Car Battery Charger
This very simple schema uses a transformer ,two diodes , a capacitor and an ammeter.To charge a battery just connect the + and - terminals of the schema 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 schema is a full wave rectifier using 2 diodes for rectification. The capacitor is used for smoothing.I think the schema works fine without the capacitor since the battery itself acts a BIG capacitor. But when you are using theschema 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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