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12 Volts Car Battery Charger Circuit Schematic Diagram
Normally, car battery charger is a simple electronic circuit which fill up the battery every time the circuit is turned ON. If the battery is already full and the circuit not turned OFF, overcharge will be happened. Overcharge can cause the electrolyte liquid evaporates and will broke the car components.
12V Car Battery Charger Circuit Schematic Diagram
The following circuit would overcome that problem by monitoring the battery charging condition through retroactive controlled circuit which supplies high current to the battery until it is fully filled. When the battery is full, LED LD2 will be activated and turned OFF the filling circuit.
You should take note that this circuit is only applicable for 12V car battery charger. Cable used on this circuit should be the ones which capable enough to handle high current in order to prevent voltage drops.
To adjust, you need to set the TR1 into 0 and then make sure that both LED are functioned properly. When you are about to set the battery, make sure that LED LD2 in Off condition and current about 2-4 amperes. Adjust the TR1 until LD2 turn on and the current stop flowing.
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