How to get 24v from pc power supply

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How to get 24v from pc power supply

Before we get going, i have to make it clear that this is by no means the safest solution, and that might even be and under estimation. I am no expert, and copying my steps is at your own cost. If you are in doubt don't try it.

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This is my first instrucable since i couldn't find this project anywhere i thought i might aswell document it with pictures. Also English is my 2nd language so bear with me.

Convert an ATX Power Supply Into a Regular DC Power Supply!

If i missed something please point it out, but if you have the above tools i have no doubt in my mind that you can make it. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.

Before going any further if you scavanged your PSU like I you should test them out before spending more time with them.

It will make the PSU turn on, test with a multimeter. For pictures i forgot to document that step just take alook around instrucables and you'll be able to see how to do that step. Theres different way of doing this, but they all do the same job.

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There also alot of chatter about how you keep the woltage steady without spikes. Again see other instrucables since most PSU are different an all have different build in features. I went with a KISS solution. Now tear apart both of them. You do this to clear any ground connection there might be, remember to remove the ground GND from the mains line you are powering the units with, then you are sure that part of the project don't go FUBAR on you.

I would not reuse the metal cabinets, period. Theres way the much risk in them making a contact with any loose wires. I also slashed all wires i wouldn't use for this project to inhance airflow in the small cabinet i build. Again think twice cut once. Create a box and make it just as safe as you treassure your own life.

Hint: I'm refering to the danger of electrocution.Power supplies are a frequently misunderstood—and overlooked—PC component. Many users choose a power supply based on total wattage alone, assuming that higher is always synonymous with better. Others pay no attention to their PSU selection at all, and settle for whatever abomination arrived with their machine.

But finding a solid, efficient power supply is possible if you arm yourself with the right knowledge. We can help. There is no single, universal rule for selecting a high-quality power supply. Nevertheless, various indicators provide circumstantial evidence of PSU quality, and some guidelines are generally helpful. First, always buy a power supply from a reputable manufacturer, and look for reviews of it before you buy.

Avoid cheap, generic power supplies, which tend to be substandard.

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Look for reputable brands that offer solid warranties and support. Corsair, Seasonic, and Antec are three manufacturers with reputations for producing high-quality power supplies, though even they may offer a few duds among all the studs.

Do your homework! Larger, heavier units are preferable to puny, lightweight models. Higher-quality power supplies almost always use bigger and better capacitors, chokes, and other internal components, and they come outfitted with larger heatsinks for superior heat dissipation—all of which translates into more weight.

Larger cooling fans, which typically move more air while making less noise than smaller fans, are another plus. Smaller units and units specially designed for enterprise and server applications are also available; but for common desktop systems, ATX power supplies are it. When searching for a power supply, keep your eyes on three crucial features: power output, rails, and efficiency.

A higher-watt PSU can supply more power. Desktop power supplies have a power output rating of from watts to watts for ultra-high-end, enthusiast-class products. Wattage ratings higher than that would exceed the capabilities of a typical ampere electrical outlet. The important number here is the one for sustained or continuous power, not the one for peak power.

Most power supplies can operate at peak power for only brief periods. Ideally your unit will delivers plenty of power to your components and offers some extra headroom in case you want to attach additional components later. Most power supplies hit their peak efficiency levels with loads in the range of 40 to 80 percent.

In a high-end system loaded with components that may peak collectively at watts, a watt PSU would work well. On the subject of wattage, one common power-supply myth holds that higher-wattage power supplies necessarily consume more power. A power supply with an efficiency rating of 80 percent provides 80 percent of its rated wattage as power to your system, while losing the other 20 percent as heat.

Power supplies in the higher certification tiers tend to command very high prices, however.There are a lot of ways that you can repurpose and reuse old electronics.

For instance, a computer power supply can make a great bench power supply for your workshop. There are already a lot of tutorials online that show how to convert an old computer power supply into a bench power supply, but most of these designs require you to permanently modify it. This design for an external adapter lets you use the power supply without modifying it. Any ATX power supply can be plugged into the adapter.

The result is a high capacity power supply that can output 3. A computer power supply converts the AC power from the wall outlet into smaller DC voltages that power the various components of the computer.

It regulates the voltages by rapidly connecting and disconnecting the load circuit switched-mode power supply. 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:. Next you need to attach wires 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. To hold the main connector in place, I used 2-part JB Weld. This compound comes in two parts; squeeze out an equal amount from each tube, then mix them together thoroughly.

how to get 24v from pc power supply

Apply the mixture all around the connector and let it sit overnight to fully cure. In order to turn on the power supply we need to connect the green wire with the ground one of the black wires. I used a small push button switch to make this connection. Solder the green wire from the 20 pin connector to one side of the switch, then solder the second green wire to the other side of the switch. To help keep them insulated, I cover the connections with heat shrink tubing.

The output terminals need to connect to multiple wires. The easiest way to keep this neat and organized is to make the connections with crimp spade connectors. Attached one to the end of each wire. In addition to the banana jack connectors, you can add other kinds of connectors. I added a 12V DC outlet. Start by drilling a hole in the side of the housing big enough for the barrel on the DC outlet.During these challenging times, we guarantee we will work tirelessly to support you.

We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what. Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together.

Updated: February 17, References. By converting the cheap free ATX power supplies that can be found in any discarded computer, you can get a phenomenal lab power supply with huge current outputs, short circuit protection, and reasonably tight voltage regulation on the 5V line. Log in Facebook Loading Google Loading Civic Loading No account yet? Create an account. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. As the COVID situation develops, our hearts ache as we think about all the people around the world that are affected by the pandemic Read morebut we are also encouraged by the stories of our readers finding help through our site.

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Learn more Explore this Article Steps. Tips and Warnings. Things You'll Need. Related Articles. On most power supply units PSUsthe other lines are unregulated. Look online or at your local computer store for an ATX computer power supply, or dismantle an old computer and remove the power supply from the case.

Unplug the power cable from the power supply and turn off the switch on the back if there is one. Also, be sure you are not grounded so that remaining voltage doesn't flow through you to ground.

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Remove the screws that attach the power supply to the computer case and remove the power supply. Cut off the connectors leave a few inches of wire on the connectors so that you can use them later on for other projects.

Discharge the power supply by letting it sit unconnected for a few days.

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Some people suggest attaching a 10 ohm resistor between a black and red wire from the power cables on the output sidehowever this is only guaranteed to drain the low voltage capacitors on the output - which aren't dangerous to begin with!

It could leave the high-voltage capacitors charged, resulting in a potentially dangerous - or even lethal - situation. Gather the parts you need: binding posts terminalsa LED with a current-limiting resistor, a switch optionala power resistor 10 ohm, 10W or greater wattage, see Tipsand heat shrink tubing.

Open up the power supply unit by removing the screws connecting the top and the bottom of the PSU case. Bundle wires of the same colors together. If you have wires not listed here brown, etc. Drill holes in a free area of the power supply case by marking the center of the holes with a nail and a tap from the hammer.

Use a Dremel to drill the starting holes followed by a hand reamer to enlarge the holes until they are the right size by test fitting the binding posts.This little module is very useful for this purpose, and can get you up to 50 watts or higher for short spurts. And if you want a different voltage, you can adjust the trim-pot over a wide variety of voltages, such as 15V, 19V, or 21V.

how to get 24v from pc power supply

Boosting 12V to 24V you can run up to 50 watts continuously, or even higher for brief excursions. Yes, by reverse biased diode across the input terminals. A fuse in the input line is required to prevent damage. Where Vin is the minimum expected input voltage in the application. Here is a chart of typical values: Vin Vout Imax Watts 3. How to get 24V from an ATX power supply. Add to Cart. Optional barrel socket to screw terminal adapters. ZHJX 5. Optional DIN mounting hardware not including the rail.

Input operating voltage. Output voltage. Examples are 15V, 19V, 21V. Note: the output voltage must be higher than the input voltage Note: the output voltage is adjustable by a trim pot from the top of the package. We will adjust it to 24V before shipping unless you request aspecific voltage when ordering. Output Power. Maximum output current. Up to 2. Under voltage lockout. Temperature Range. Electrostatic immunity. Operating temperature range.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. I prefer easy soldering solution like DIP, and standard components that do not need to be purchased over internet. Any ideas, please?

24V from 12V power supply?

You can open the supply and look for the TL chip. There will be two resistors forming a voltage divider from the 5V rail to the 2. If you calculate the right resistor values, you can set this divider to output half the voltage it currently does. You will probably need to install new output filter capacitors of higher voltage rating as well. And if you modify an ATX supply this way, please cut off the ATX connector and install something else, so it won't plug in to a motherboard.

I have done this in the past using 2 supplies in series. The ground for the supply is the wall ground so to make it work I had to take one of the supplies apart and mount the board on nylon bolts to isolate it from the case. Then that supply floats and can be put in series. Not quite sure what happens around the current limit of the supply. So it's 24V betweeen blue and yellow.

You'll likely want to use more than one lead then.

ATX Computer Bench Top Power Supply. - Step by step.

Computer PSU, even the oldest one is a switching power supply, has no or anything like that, should handle 3 amps. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.Menu Menu. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced….

how to get 24v from pc power supply

Log in. Trending Search forums. What's new. New posts Latest activity. EE's please? Thread starter Zebo Start date Jan 22, Sidebar Sidebar. Forums Social Ask a Technical Professional. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Previous Next.

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Zebo Elite Member. Jul 29, 39, 2 0. You can use any combination of these to get voltages of: 1. Dec 7, 0 0. Combine two 3. Total would be CTho Elite Member. Jul 26, 9, 1 0.

Originally posted by: rimshaker Combine two 3. Originally posted by: CTho Originally posted by: rimshaker Combine two 3. Mark R Diamond Member.

Oct 9, 8, 13 Ahh so there is a V line which is it BTW? Say the pump draws 2. Jan 25, 7, 22


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