DIY Circuit Car Battery Charger

  
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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, af
DIY Circuit Car Battery Charger - schematic

ter which the battery should be removed from the charger.



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