How do I change 12V to 6V?

Are you talking about AC or DC? If it's AC, you can use a transformer, if it's DC, you can use 7806 to step down, and if the power is not enough, you can use a triode to diffuse the current.

Electronics building buy a resistor plus on it.

What do you mean? To be clear, I don't understand

How to change a 12V battery to a 6V battery.

7806 is regulated with three terminals

There are also 7805, 7808, 7809, 7812, 7815, 7818, 7824 and so on.

Application circuits are found on the web"Three-terminal regulated application circuit"Much more.

The output power of the 78xx series is ampere, and it is troublesome to use a triode to expand the current.

N 78xx can be connected in parallel.

In addition, the following precautions should be taken into account in the step-down circuit of the 78xx tri-terminal device:

1. The pressure difference between input and output should not be too large, if it is too large, the conversion efficiency will be reduced rapidly, and it is easy to break down and be damaged;

2. The output current should not be too large, which is its limit value. For the output of high current, the size of the heat sink should be large enough, otherwise it will lead to high temperature protection or thermal breakdown;

3. 78xx three-terminal devices are rarely used in the current voltage stabilization circuit, especially in the case of large voltage difference and large current, and other new devices are more selected. For example, the LM2940, LM2651, LM5020 for NS, the MAX1747 for Maxiam, and so on.

Personally, I think that the design of the power supply needs to consider the following points:

1. The topology of the circuit;

2. Selection and selection of devices;

3. The occasion of application;

4. Conversion efficiency and reliability of power supply.

In particular, the last point is that the level of conversion efficiency affects reliability to a certain extent. Some people think that it is possible to use a high-power step-down resistor regardless of efficiency - this is something I don't agree with, and it's debatable.

The factors that affect the efficiency of the power supply mainly include: circuit topology, selected voltage regulator devices, characteristics of power switches, rectifier diodes, etc., PCB design, etc. The low conversion efficiency of power regulators may be due to the following reasons:

1. The pressure difference between input and output is too large;

2. The selected voltage regulator chip and peripheral circuit are not suitable;

3. Problems with the use environment.

I don't quite understand what you said, 12v to 6v, do you mean a car or something else, please explain.

1.You can buy a DC-DC converter to convert the 12V battery voltage into a 6V electric voltage for your child's electric vehicle.

2.Or use an LM7806 three-terminal regulator to step down the voltage of a 12V battery to 6V.

The calculated value of the small current below 100 mA can be connected with a resistor, which is very convenient, but it is limited by the change of electrical parameters.

100-500 mAh or with a three-terminal regulator LM317 or 7806 should also be connected to the heat sink, which is not limited by the parameters of electrical appliances, and the efficiency is not high, at most.

Only 50%, the fever is large.

If it is a high current of 500 mAh, you have to go to the market to find a 12V to 6V DC-DC converter, which has high efficiency, low heat generation and reliability.

High, not limited by the parameters of electrical appliances, this is the best choice, but the cost is about 50 yuan higher.

Using a transformer is nonsense, who can use a transformer to change direct current.

The home 220V to 6V is not the same as this principle, and there is no comparison.

The 12V voltage can be obtained by connecting the two 6V batteries in series with volts, which is that the positive pole of the battery is connected with the negative pole of the other battery, so that the voltage of the two batteries is 12V.

Choose two batteries in series, preferably the voltage and capacity of the two batteries are the same. Otherwise, it will be more troublesome in the process of use and charging. The battery with a small capacity will be discharged quickly, and if you continue to use the battery with a small capacity, it will be overdischarged, damaging the electrode plate and causing scrap.

The charging hall also needs to charge them separately, otherwise charging them together, the large-capacity battery is not full, and the small-capacity battery is overcharged, which will also cause the battery to be scrapped.

Install a 6V charger.

The full bridge is the name of the rectifier circuit, the whole bridge is composed of 4 rectifier diodes, because the mains is AC 220V, even if you use a 220V transformer to output 6V, you still can't charge the battery to convert to DC, the whole bridge is to convert DC.

The charger itself has a complete set of charging, over-current, and over-voltage protection circuits, and if you want to directly use 12V to charge the 6V battery, you need to have a voltage regulating circuit, which can adjust the charging voltage, and there is also a voltmeter to monitor whether the charging voltage reaches the full charge of the battery, and of course, the rectifier is also needed.

The output is 12V, you can use a 7806 regulator manifold to output 6V voltage, but at this time, the charging of the 6V battery is still low, and you can connect a regulator tube or two 1N4007 diodes at the grounding end of the regulator block. Just raise the voltage to that. Give you a diagram for reference.

You use a 6V battery to charge the mobile phone with a higher voltage, and like this circuit, you can connect a 7805, and one foot can be directly connected to the ground terminal to charge the mobile phone battery.

To charge a 6V battery with a 220V 12V transformer, you need to know the battery capacity, taking 5Ah as an example, the charging current is.

1. Material: 1 6V motorcycle headlight bulb, 1 full bridge above 1A, a number of wires, 2. Calculation: 6V battery termination charging voltage is 6*, 12V transformer is 6V after series 6V motorcycle headlights, and the maximum output voltage is 6*, if the diode voltage drop in 2 full bridges is only, then, the maximum output voltage is, in which the light and dark of the motorcycle headlights can adjust the voltage.

3. Connection and charging: 220V is connected to the input end of the transformer, and after the output of the 12V end of the lead series headlight, it is connected to an input "" end of the whole bridge; The other end of the output 12V is connected to the other input " " end of the full bridge, and the output end of the full bridge "+" is connected to the positive terminal of the battery, and the "- is connected to the negative terminal of the battery. Power on, charge, timing about 10 hours, can be 20% of the battery is basically full, rather less charge, do not charge more.

Yes, but my brother doesn't have time to teach you.

The easiest way is to buy 9 1N5401 diodes, connect them in series to the positive pole of the battery, and then the output is 6V, (a diode is up to 5 dimes), because the voltage drop of silicon diodes is each to, and the voltage drop of 9 diodes in series is about 6V.

Cause of current formation]: Because of the existence of voltage (potential difference), the electric field strength is generated, so that the free charge in the circuit is affected by the electric field force and produces directional movement, thus forming the current in the circuit.

Current classification] Current is divided into AC current and DC current.

Alternating current: Appliances plugged in to the power supply use alternating current.

Direct current: Electrical appliances that use an external power supply use direct current.

Alternating current is generally widely used in home circuits, with a voltage of 220V, which is a dangerous voltage.

Direct current is generally widely used in mobile phones (lithium batteries). Like batteries, lithium batteries, batteries, etc., are called direct current.

Use the LM7806 regulator block, which is convenient and simple, the voltage is stable, and it can provide enough current to the speaker. The wiring is very simple, one input, one output, the pin is grounded, and a decoupling capacitor of about 100U can be connected between the output and the ground.

Buy a three-terminal regulator block LM7806, the left (first pin) input is connected to the battery +12, the middle indirect battery is negative, and the right (third pin) output is +6V.

Go to ** buy an adjustable switching power strip, which can not only meet the requirements, but also save electricity and not get hot.

Buy three-terminal regulator, the model on the picture is 7805, 7806 is the same as it.

I use a very small current (500mA), 12V string 6 1N004 into 6V line?

Buy a 12V to 6V converter. Just connect it directly, and add a switch between the converter and the battery.

The converter with battery is directly 6V.