This is Simple Car Battery Charger Electronic Suite. It consists of a transformer, a capacitor, an ammeter, and two diodes. To charge the battery, connect the (+) and (-) pole to the proper place in the battery. When the battery is not yet full, the ammeter reading is around 1-3 Amperes. If the ammeter is already full, the reading will show the value around 0. At this point, the battery should be removed from the circuit.
Note : BRX49 can also be change with 2N883, 2N891, or 2N6565.
This circuit is a full wave rectifier with two diodes. Capacitor is used to smoothen the output. However, the circuit will still be fully functioned without any capacitor because the battery itself is a capacitor. But if the circuit will be used as a 12 volt power supply, capacitor should be used.
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