12V Battery Charger circuit - Simple Electronic Project
Introduction
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Diagram of Auto cut off Battery Charger circuit
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Components Needed for this Project:
You can get the components from any of the sites below:
- 5 Pin Relay [See Buy Click Amazon]
- BC547 Transistor [See Buy Click Amazon]
- LED 5mm [See Buy Click Amazon]
- 1N4007 Doide [See Buy Click Amazon]
- 10k Ohm Varible Resistor [See Buy Click Amazon]
- 10k Ohm Resistor [See Buy Click Amazon]
- 1k Ohm Resistor [See Buy Click Amazon]
*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!
Related Basic Electronic Mini Project Circuit Diagram:
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Working Principle
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Frequently asked questions
How long does it take to charge a car battery with a 12 voltage charger? Car batteries usually hold 48A, so it will take about 12 hours to reach a full charge using a 12V charger.
The target voltage for a 12v charger for AGM or some flooded batteries is 2.4 to 2.45v per cell, which is 14.4 to 14.7v. Some flooded cells will tolerate over 15V.
To charge this battery in half the time would require a 20A charger. As a rule of thumb, however, you should use a battery charger that is a minimum of 10% of your battery's ampere-hour rating, and within 20% of its maximum capacity to avoid overcharging.
A good car battery should read 12.4-12.9v when the car is off. Anything lower doesn't necessarily mean the battery 12V is bad. Your car's Electronic system may have drained it.
A basic home battery charger incorporates a transformer and rectifier, to change the mains 110/220 voltage alternating current to 12v direct current, and allows the mains supply to provide a charging current at a rate determined by the state of the battery charger.
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