Pc power supply converters

This design lets you utilize the power supply without having to modify it. Here are the materials that you will need for this project.

A computer power supply converts the AC power from the wall outlet into smaller DC voltages that power the various components of the computer. They regulate the voltages by rapidly connecting and disconnecting the load circuit Switched-mode power supply.

Most modern computer power supplies follow the ATX convention. Computer power supplies have a number of safety features that help to protect you and the power supply itself. Here are a couple that you need to know about.

Turning on the Power Supply A power supply is designed to not turn on unless it is connected to a computer motherboard. This is controlled by the green "Power On" wire. Connecting this wire to ground any black wire will allow the power supply to tun on.

Minimum Load Requirement Many power supplies require a minimum load current in order to stay on. Without this load the output voltages may vary significantly from the specified voltages or the power supply might shut itself off.

In a computer the current that is used by the motherboard is sufficient to meet these requirements. If your power supply has a minimum output requirement, you can meet this by connecting a large power resistor across the output terminals. This is discussed in a later step.

The wires on the main 20 pin or 24 pin connectors are color coded. These are the same for all ATX power supplies. Ground wires are black. The green wire is the power on sensor. This wire is internally connected to 5V with a pull-up resistor. If you connect this wire to ground any black wire the power supply will turn on.

This outputs a 5V signal even if the rest of the power supply has not yet turned on. The gray "Power Good" indicator. This wire is at 5V if each of the output wires is operating at the correct voltages.

To make the connections easier to identify, I used colored markers to color code each slot on the 20 pin connector. Next you need to attach a wire to some of the pins on the connector. I connected to the 3. Solder the wires to each connector. It is easier if you select pins that are a little spaced out from each other. I also used the same colored wires to help keep track of them.

In order to attach the connector to the housing, you first need to cut a slot for it. It is easiest to do this at the edge where the two parts come together. Hold the connector up to the side of the housing and mark the edges. Then using a sharp knife, cut along the outline. I am using four pairs of Banana jack connectors for the outputs. So I marked eight locations evenly spaced on the top of the housing. Then I drilled holes that where just big enough for the mounting screws.

I also drilled a hole for the power switch on the right side. Once all the holes were drilled I inserted the switch and the power terminals and fastened them in place. To hold the main connector in place I used 2 part J-B Weld. This compound comes in two parts. Squeeze out an equal amount from each tube.

Then mix them together thoroughly. Apply the mixture all around the connector. Then let it sit overnight to fully cure. In order to turn on the power supply we need to connect he green wire with ground one of the black wires. I used a small push button switch to make this connection. I soldered the green wire from the 20 pin connector to one side of the switch. Then I soldered the second green wire to the other side of the switch.

To help keep them insulated, I covered the connections with heat shrink tubing. I attached the banana jack terminals to the top of the housing in two rows. The red terminals would be for the positive 3.

The black terminals would be for ground. XQ Tech and Data. Ports n Wire Computing. YI's Marketplace. PartsCom USA. Premium Wholesale. KH Online. Multi Pixel Media. Direct from Manufacturer. Less than 1 Year. More than 5 years. Free Shipping. Top Sellers. Price Match Guarantee. Discount Item. Mail-in Rebate. Volume Savings. Clearance Item. New Arrival. United States. Hong Kong. We also provide a comprehensive range of hardware and software evaluation and development tools including our eDesignSuite that helps engineers design high efficiency power supplies and converters.

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