12V power supply from pc power supply is practical

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List of contents for this article:

• 1、How to get 12V power from computer power supply
• 2、What is the use of a computer power supply minus twelve volts? What is the use of a computer power supply output of 12v5v and what is the use of 12v5v...
• 3、Which hardware does the +12V/+5V/+3.3V in the power supply power?
• 4、What is the actual rated power of this power supply? How do you calculate it?

How to get 12V power from computer power supply

Direct power extraction method draws power directly from the 12V output terminal: If you only need 12V DC power and the computer power supply has a 12V output port, you can draw power directly from this port. This method is relatively simple and safe, but attention needs to be paid to ensure voltage stability. It may be necessary to purchase additional high-power buck modules to ensure voltage stability and safety of use.

AC 12V can be achieved by adding a transformer. Rectification is then added with a rectifying circuit and a filter circuit to form a stable 12V rectified power supply. Capacitors and resistors are connected in parallel to form a resistance-capacitance buck circuit, which then enters a rectifier bridge for rectification. A 12V regulator tube is used to obtain a stable voltage value, but the output power is relatively small.

AC 12V plus a transformer can realize rectification, rectification circuit and filter circuit, becoming a stable 12V rectified power supply.

What is the use of a computer power supply minus twelve volts? What is the use of a computer power supply output of 12v5v and what is the use of 12v5v...

1. V voltage: mainly used to provide judgment levels for logic circuits. Similar to 12V, it appears less frequently in modern computer power supplies, and many commercially available power supplies no longer provide even a 5V output. It is also used for logical judgment. The current required is very small and the impact on the normal operation of the system is basically negligible. However, in some specific old hardware or special application scenarios, 5V voltage is still necessary.

2. The 5V and 12V output from the computer power supply are mainly used to provide the stable DC voltage required for different components inside the computer. The 5V voltage is mainly used for some low-voltage components, such as USB interfaces, some sensors, indicators and some control circuits. The USB interface requires a voltage of 5V to work properly in order to provide charging or data transmission functions for external devices such as mobile phones, tablets, etc.

3. The-12V and-5V voltages output by the computer power supply mainly have the following functions: -12V voltage is mainly used to provide logic judgment levels for the serial circuit. This voltage was common in early PCs and was used in floppy drive controllers and certain ISA bus board circuits. Although the use of-12V has been relatively reduced in modern computer systems, it still plays an important role in some specific scenarios, such as serial communication.

4. The 5V and 12V output of computer power supply play an important role in the power supply system. First of all, 5V power supply is mainly used to provide working voltage for integrated circuits such as CPU, PCI, AGP, and ISA. It is one of the main working power supplies in computers. In addition, 5V power supply is also often used to supply power to hard drives, optical drives, USB devices and mouse keys. These devices often have high requirements for voltage stability. Secondly, the role of the 12V power supply is more extensive.

5. The 12V and 5V voltages output by the computer power supply play a key role in the system. 12V voltage **: It is the heaviest load in computer power supply and is mainly responsible for supplying power to high-energy-consuming components such as CPU (central processing unit) and GPU (graphics processor). As the performance of processors and graphics cards continues to improve, their demand for electricity is also growing.

6. The 5V and 12V power output of the computer mainly provide a stable power supply for different hardware devices inside the computer. In detail, 5V voltage is usually used to supply some low-voltage equipment inside the computer. For example, a computer's USB interface, some sensors, and some chipsets require 5V to work properly. USB devices, such as external hard drives, mice, keyboards, etc., all require a voltage of 5V to drive.

Which hardware does the +12V/+5V/+3.3V in the power supply power?

1. The +12V power supply supplies power to the CPU and PCIE slots; the +5V and +3V power supply supplies power to the chips and various interfaces on the motherboard.

2. Large 4pin peripheral power supply interface Small 4pin floppy drive interface Small 4pin floppy drive interface SATA hard disk interface 3V voltage, converted by the motherboard's voltage conversion circuit and used to drive CPU, memory and other circuits.+ 12V: Used to drive disk drive motors, cooling fans, or to drive other boards through the bus slot of the motherboard.

3. V is divided into +5V (high current) and 5VSB (standby) and +12V and-12V. It provides power to the motherboard. Among them,+5V and +12V generally supply power to external storage devices, such as optical drives and hard drives. In addition, it also supplies power to the motherboard, and 3V generally supplies power to the CPU of the motherboard. Every voltage you mentioned is also necessary for a computer mainframe.

4. The desktop power supply mainly provides DC power supply with three voltages: 12V, 5V and 3V to the internal hardware of the computer. Among them, the 12V output is the most important, mainly supplying power to the CPU and discrete graphics cards.

5. There are +5V,-5V,+12V,-12V,+3V in the 0/24 pin, as well as two control signals for the power supply. The hard disk interface of 4PIN is 12V and 5V, and the interface of the cpu is 12V. Power supply to the motherboard is relatively complicated.+ 12V mainly supplies power to the CPU. It is also responsible for auxiliary power supply to the hard disk and graphics card. It also needs to supply PCI and other interfaces.

6. The power supply interface is an important part when assembling a computer. Different interfaces are responsible for supplying power to different hardware, and the voltage, current and power are different. The following is a detailed explanation of the breakdown of the main power supply interfaces: 24Pin main power supply interface Function: The main PC power supply interface is directly plugged into the motherboard to provide power to the entire motherboard system.

What is the actual rated power of this power supply? How do you calculate it?

1. The rated power is 600W. 600W means that this power supply can ensure long-term, safe and stable operation at a full load of 600W.

2. The rated power of the power supply refers to the standard power output by the power supply, and is also the product of the voltage and the maximum output current. The calculation formula can be expressed as: P (rated)=U× (I+4)(maximum output current of +5V). U of this formula is a variable voltage value. When estimating, the value can be between 10 and 15, and it is appropriate to take the minimum value when estimating.

3. Rated power is related to environmental temperature radiation, and rated power is defined (rated power supply * rated current. Maximum output without damaging the power supply). Conventional calculation of the maximum output power *80% is approximately equal to the rated power. Peak: Instant power.

4. Calculation formula: To calculate the rated power of the power supply, you need to know the output voltage and output current of the power supply. These two parameters can usually be found on the specifications or label of the power supply. The calculation formula is: rated power = output voltage × output current. For example, a power supply with an output voltage of 12V and an output current of 5A has a rated power of 12V × 5A = 60W. Actual output power: It should be noted that the actual output power of the power supply may change due to changes in the load.

5、=10×（20+4）=240W。Precautions When calculating the power rating, ensure that the formulas and parameters used are accurate and reliable. Different power supplies may have different design characteristics and parameters, so the specifications for the specific power supply should be referred to when making calculations. The rated power is the maximum power that the power supply can continuously and stably output. Excess of this power may cause the power supply to overheat, be damaged, or fail to work properly.

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