What is the use of the brown wire 3 3V sense of the main power supply

The purpose of several sets of output voltages of ATX power supply + is provided to the motherboard, CPU, memory, various boards, etc.

+12V and +5V are mainly used to power graphics cards, motherboards, memory, hard disks, optical drives, and fans.

The main thing is to power the CPU.

Powering motherboards and other hardware.

CPU auxiliary power supply line, near the motherboard CPU or motherboard power socket you will find a power supply interface, if you buy CPU power consumption, the motherboard can not provide such a large power consumption, you have to plug this socket on.

Red: represents the +5V power cord (chip operating voltage on hardware such as motherboards, hard disks, and optical drives).

Yellow: represents the +12V power cord (the operating voltage on hardware such as hard disks, optical drives, and fans, and -12V simultaneously provides EIA power to the serial port).

Orange: represents + power cord (directly to DIMM, AGP slots).

Gray: represents the signal line (power status information line, it is the result of other power lines calculated through a certain circuit, when the computer start button is pressed, this signal indicates that the power supply is good and can be turned on without signal, indicating that there is a faulty motherboard automatic monitoring).

Blue: represents the -12V power cord (which provides EIA power to the serial port).

White: Represents the -5V power cord (floppy drive phase-locked data separation circuit).

Purple: Represents the +5V Standby power cord (which powers a small portion of the motherboard's circuitry after shutdown to detect various power-on commands).

Green: represents the PS-ON signal cable (the signal cable of the motherboard power is turned off, there is a certain voltage when it is not connected, and it can be directly connected to the black wire for a switch, or it can be regarded as the power on button when the power is turned on).

Black: The ground wire of the system circuit.

There's an extra + (pink line) basically doesn't need it.,But the five-root strip is theoretically better.。。。 The hard disk should be less heated... I don't need to turn it inside 5V.

vsense(v): is to monitor the sampling voltage.

VSENSE: Auxiliary voltage monitor wheel control input.

VSENSE is the input to the second voltage monitor, and its value is compared to the reference voltage inside the CAT1026 and CAT1027.

When the input voltage of the VSENSE pin is lower than , the VLOW output of the open-drain output pin is driven low by the potato bush. The voltage value is monitored by the external one.

Voltage divider resistor to set. VSENSE connects to VCC when not in use.

PCs need a precise, stable, and pure power supply, and the power supply orange line output is a power supply specifically set to provide power to the memory. If the voltage is insufficient, the output of the host power pack is faulty. The power supply and memory are insufficient and cannot be started.

Is a power failure, repair or replacement of the power supply.

The black one is the ground wire, the yellow one is +12v, the orange one is +, and the red one is +5v, depending on what device you have connected. Generally, it is a D-type plug. If it's a yellow line, it's mostly connected to a fan.

There is a word written on the head of the wire, according to the corresponding needle socket inserted into the computer motherboard, hddled = hard disk indicator, power led=power indicator, reset sw=restart key, power sw=power on, key power switch and restart key, you can not distinguish the positive and negative poles, the LED indicator needs to be divided into positive and negative poles, and there will be a white line that belongs to the negative pole (the positive and negative poles are plugged in the opposite direction, it is fine, it does not affect the operation of the computer, but it is not lit, if there is a mistake, you can change it back).

Please upload the following**. I'll help you explain it in detail.