Electrical circuit breaker keep tripping. A few of my circuit breakers are turning off daily. I have to constantly flip them back to ON. What would cause this I just. Cost To Build A Brick Shed Big Green Egg Table Plans With Doors Cost To Build A Brick Shed Drop Leaf Dining Table Plans Wood Picnic Table Bench Plans. Power supply unit computer Wikipedia. An ATX power supply unit with top cover removed. 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 supplies. Some 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 conform to the ATX specification, which includes form factor and voltage tolerances. Brick Breaker Pc' title='Brick Breaker Pc' />While an ATX power supply is connected to the mains supply, it always provides a 5 Volt standby 5. VSB voltage so that the standby functions on the computer and certain peripherals are powered. ATX power supplies are turned on and off by a signal from the motherboard. They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot. FTgDukV8BFTfkCbGXgBYoOTU4bUI8qVV9txEBJopKM4Ua3dkf1dmBhK7o4yREcBELTM' alt='Brick Breaker Pc' title='Brick Breaker Pc' />The most recent ATX PSU standard is version 2. FunctionseditSimplified circuit diagram of a typical PSUDiagram of a typical XT and AT voltage regulator circuit. Internals of a PSU with passive PFC left and active PFC rightThe desktop computer power supply changes alternating current from a wall socket to low voltage direct current to operate the processor and peripheral devices. Several direct current voltages are required, and they must be regulated with some accuracy to provide stable operation of the computer. A power supply rail or voltage rail refers to a single voltage provided by a power supply unit PSU. Although the term is generally used in electronic engineeringcitation needed, many people, especially computer enthusiasts, encounter it in the context of personal computer power supplies. First generation microcomputer and home computer power supply units used a heavy step down transformer and a linear power supply, as used, in for example, the Commodore PET introduced in 1. Zombie Exterminator Walkthrough Cheats For Personal Computer Play Zombie Exterminator with Achievements now Tell A Friend About These Game Cheats. Brick Breaker Pc' title='Brick Breaker Pc' />The Apple II, also introduced in 1. The switched mode supply uses a ferrite coredhigh frequency transformer and power transistors that switch thousands of times per second. By adjusting the switching time of the transistor, the output voltage can be closely controlled without dissipating energy as heat in a linear regulator. Berio Sequenza Flute Universal Edition. The development of high power and high voltage transistors at economical prices made it practical to introduce switch mode supplies, that had been used in aerospace, mainframes, minicomputers and color television, into desktop personal computers. The Apple II design by Atari engineer Rod Holt was awarded a patent,1,2 and was in the vanguard of modern computer power supply design. Now all modern computers use switched mode power supplies, which are lighter, less costly, and more efficient than equivalent linear power supplies. Computer power supplies may have short circuit protection, overvoltage protection, undervoltage protection, overcurrent protection, and over temperature protection. Recent power supplies have a standby voltage available, to allow most of the computer system to be powered off. When the computer is powered down but the power supply is still on, it can be started remotely via Wake on LAN and Wake on ring or locally via Keyboard Power ON KBPO if the motherboard supports it. This standby voltage is generated by a smaller power supply inside the unit. The standby power source was a small linear power supply with conventional transformer, which was later changed to a switching power supply, sharing some components of the main unit due to cost and energy saving requirements. Power supplies designed for worldwide use were equipped with an input voltage selector switch that allowed the user to configure the unit for use on local power grid. In the lower voltage range, around 1. V, this switch is turned on changing the power grid voltage rectifier into a voltage doubler in delon circuit design. As a result, the large primary filter capacitor behind that rectifier was split up into two capacitors wired in series, balanced with bleeder resistors and varistors that were necessary in the upper input voltage range, around 2. V. Connecting the unit configured for the lower range to a higher voltage grid usually resulted in an immediate permanent damage. When the power factor correction PFC was required, those filter capacitors were replaced with higher capacity ones, together with a coil installed in series to delay the inrush current. This is the simple design of a passive PFC. Active PFC is more complex and can achieve higher PF, up to 9. The first active PFC circuits just delayed the inrush. Newer ones are working as an input and output condition controlled step up converter, supplying a single 4. V filter capacitor from a wide range input source, usually between 8. V. Newer PFC circuits also replace the NTC based inrush current limiter, which is an expensive part previously located next to the fuse. DevelopmenteditPCB of a power supply from an IBM XT clone. A typical XT PSU power switch, which is an integral part of the PSUOriginal IBM PC, XT and AT standardeditThe first IBM PC power supply unit PSU supplied two main voltages 5 V and 1. V. It supplied two other voltages, 5 V and 1. V, but with limited amounts of power. Most microchips of the time operated on 5 V power. Of the 6. 3. 5 W these PSUs could deliver, most of it was on this 5 V rail. The 1. 2 V supply was used primarily to operate motors such as in disk drives and cooling fans. As more peripherals were added, more power was delivered on the 1. V rail. However, since most of the power is consumed by chips, the 5 V rail still delivered most of the power. The 1. 2 V rail was used primarily to provide the negative supply voltage to the RS 2. A 5 V rail was provided for peripherals on the ISA bus such as soundcards, but was not used by the motherboard. An additional wire referred to as Power Good is used to prevent digital circuitry operation during the initial milliseconds of power supply turn on, where output voltages and currents are rising but not yet sufficient or stable for proper device operation. Once the output power is ready to use, the Power Good signal tells the digital circuitry that it can begin to operate. Original IBM power supplies for the PC model 5. XT and AT included a line voltage power switch that extended through the side of the computer case. In a common variant found in tower cases, the line voltage switch was connected to the power supply with a short cable, allowing it to be mounted apart from the power supply. An early microcomputer power supply was either fully on or off, controlled by the mechanical line voltage switch, and energy saving low power idle modes were not a design consideration of early computer power supplies. These power supplies were generally not capable of power saving modes such as standby or soft off, or scheduled turn on power controls. Due to the always on design, in the event of a short circuit, either a fuse would blow, or a switched mode supply would repeatedly cut the power, wait a brief period of time, and attempt to restart. For some power supplies the repeated restarting is audible as a quiet rapid chirping or ticking emitted from the device. ATX standardedit. Voltage converter for 8. DX4 processors 5 V to 3. V. Note the heat sink on the linear regulator, required to dissipate the wasted power. A typical installation of an ATX form factor computer power supply. The Best Games in the Universe.