Computer power supplies have a number of safety features that help to protect you and the power supply itself. Each part ought to be set and linked to other parts in specific manner.
The diagram below shows a partial schematic of a 450 watt atx power supply.
Computer power supply wiring diagram. Otherwise the arrangement won t work as it ought to be. Most modern desktop personal computer power supplies conform to the atx. This schematic does not show the control circuitry that s why you see all mosfet gates and transistor bases are open.
This power supply circuit uses chip tl494. Here i bring you wiring diagram of pcs power supply of dtk company. This is controlled by the green power on wire.
This power supply has atx design and 200w performance. The original atx standard connector used for powering the motherboard was a single 20 pin molex that has all the required 12vdc and 5vdc voltages with huge output currents and short circuit protection as well as a power on wire that allows the pc s software to turn off the psu on shut down. In addition to the old at standard atx 2 0 has one extra voltage line available 3 3v a connector chain lined to the single 20 pin and a power on wire that allows software to turn off the psu.
A power supply unit psu converts mains ac to low voltage regulated dc power for the internal components of a computer. Excellent diagrams here and good ideas about fuse use a very slick supply built to allow psus to be easily exchanged this project is my personal favorite this hacker has created and sells an adapter to. Here are a couple that you need to know about.
200w atx pc power supply introduction. Most computer psu s range from about 150w up to 500w so there is plenty of power. I was drawed diagram when i repaired this power supply.
Turning on the power supply it is designed to not turn on unless it is connected to a computer motherboard. 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. Its construction is typical for a modern computer psu with mosfet switches and active power factor correction pfc.
Atx specification includes not only power supply unit but also interface to case and motherboard. If you use one of these adapters then be sure to plug the 4 pin peripheral connectors into separate cables coming from the power supply. If you plug them both into the same power supply cable then you are drawing all the power of the 8 pin 12 volt connector through a single 18 gauge wire.
Computer power supply wiring diagram computer power supply connector diagram computer power supply pinout diagram computer power supply wiring diagram every electrical structure consists of various distinct pieces. This is a conceptual circuit diagram of the power train of a typical atx computer power supply unit. Note that most schematics circulating on the internet depict old style psu with bipolar transistors and without pfc.
Connecting this wire to. An interesting project to create a variable output benchtop power supply from an atx psu other good instructables on psu modification. For clarity the parts responsible for miscellaneous auxiliary functions such as current limit fan control and ov.