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### Components Needed for this Project:

You can get the components from any of the sites below:

1. 5 Pin Relay [See Buy Click Amazon]
2. BC547 Transistor [See Buy Click Amazon]
3. LED 5mm [See Buy Click Amazon]
4. 1N4007 Doide [See Buy Click Amazon]
5. 10k Ohm Varible Resistor [See Buy Click Amazon]
6. 10k Ohm Resistor [See Buy Click Amazon]
7. 1k Ohm Resistor [See Buy Click Amazon]

Related Basic Electronic Mini Project Circuit Diagram:

### Working Principle

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How long does a 12v battery take to charge?

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.

What voltage can charge a 12V battery?

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.

How to choose a 12V battery charger?

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.

What is a good battery voltage?

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.

How does a 12V battery charger work?

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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