Personal computer and power supply

Yellow green Single vs. The rule was intended to set a safe limit on the current able to pass through any single output wire. A sufficiently large current can cause serious damage in the event of a short circuitor can melt the wire or its insulation in the case of a fault, or potentially start a fire or damage other components. Each rail delivers up to a limited amount of current through one or more cables, and each rail is independently controlled by its own current sensor which shuts down the supply upon excess current.

Personal computer and power supply

The interior of a power supply. Power supplies, often referred to as "switching power supplies", use switcher technology to convert the AC input to lower DC voltages. The typical voltages supplied are: The main specification of a power supply is in watts.

A watt is the product of the voltage in volts and the current in amperes or amps. If you have been around PCs for many years, you probably remember that the original PCs had large red toggle switches that had a good bit of heft to them.

Personal computer and power supply

When you turned the PC on or off, you knew you were doing it. These switches actually controlled the flow of volt power to the power supply. Today you turn on the power with a little push button, and you turn off the machine with a menu option.

These capabilities were added to standard power supplies several years ago.

Product Features PFC Sine Wave Battery Backup Uninterruptible Power Supply (UPS) System. A power supply unit (or PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power kaja-net.com power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage.. Most modern desktop personal computer power supplies . Feb 04,  · Power supplies are a frequently misunderstood—and overlooked—PC component. Many users choose a power supply based on total wattage alone, assuming that .

The operating system can send a signal to the power supply to tell it to turn off. The push button sends a 5-volt signal to the power supply to tell it when to turn on. The power supply also has a circuit that supplies 5 volts, called VSB for "standby voltage" even when it is officially "off", so that the button will work.

Switcher Technology Prior to or so, power supplies tended to be heavy and bulky. They used large, heavy transformers and huge capacitors some as large as soda cans to convert line voltage at volts and 60 hertz into 5 volts and 12 volts DC.

The switching power supplies used today are much smaller and lighter. They convert the Hertz Hz, or cycles per second current to a much higher frequencymeaning more cycles per second. This conversion enables a small, lightweight transformer in the power supply to do the actual voltage step-down from volts or in certain countries to the voltage needed by the particular computer component.

The higher-frequency AC current provided by a switcher supply is also easier to rectify and filter compared to the original Hz AC line voltage, reducing the variances in voltage for the sensitive electronic components in the computer.

In this photo you can see three small transformers yellow in the center. To the left are two cylindrical capacitors. The large finned pieces of aluminum are heat sinks.

The left heat sink has transistors attached to it. These are the transistors in charge of doing the switching -- they provide high-frequency power to the transformers.Shop for computer power supplies at Best Buy. Choose from a great selection of power supplies for your laptop or desktop computer.

Make sure this fits by entering your model number.; This power supply tester is the ultimate tool for all computer repair people. It comes with an 8-in-1 ATX power supply tester that outputs the voltage levels of your connectors to a inch screen that is built into the device!You can accurately detect problems with power supplies and prevent damage to your motherboard.

Shop for computer power supplies at Best Buy. Choose from a great selection of power supplies for your laptop or desktop computer. A power supply unit (or PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power kaja-net.com power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage..

Most modern desktop personal computer power supplies . The PSU (a.k.a. power supply unit) is virtually the heart of the computer. It is a vitally important part that delivers power to components that comprise the computer system. A high-quality power supply can make the difference between a perfect machine and an .

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

PCs are intended to be operated directly by an end user, rather than by a computer expert or kaja-net.comer time-sharing models that were typically used with larger, more expensive minicomputer and mainframe systems, to enable them be used by many people at the.

Power supply unit (computer) - Wikipedia