Computer Tutorial

Power supply:-

                                  A power supply unit (PSU) is the component that supplies power to the other components in a computer. More specifically, a power supply unit is typically designed to convert general-purpose alternating current (AC) electric power from the mains (100-127V in North America, parts of South America, Japan, and Taiwan; 220-240V in most of the rest of the world) to usable low-voltage DC power for the internal components of the computer. Some power supplies have a switch to change between 230 V and 115 V. Other models have automatic sensors that switch input voltage automatically, or are able to accept any voltage between those limits. It converts high voltage into low voltage.

Power supply units often used in computers are SMPS (Switch Mode Power Supply). The SMPS provides +12, -12, +5, -5 and 3.* DC Volts for operation. When using the SMPS, it results in uninterrupted output within a wide range of input AC voltages. SMPS makes the power supply unit compact, rigid and reliable. The SMPS will switch over until it gets a negative loop from the computer's motherboard when switching ON the CPU. First, the SMPS converts the input AC voltage into corresponding DC voltage, which is then applied to a switching circuit at very high frequency. This high frequency (AC) is fed to a step down transformer with different tapings for various voltages required to run a computer. These AC voltages are then rectified and filtered. Finally, we get pure DC voltage of different levels.The power supply he si main of motherbord and then current motherbord for fan, process and SMPS of name hard wire of smps wire and power managment of process fan and other devisec of power supply