Basically you ground the green wire and put 1 to 2 amp fixed load on the 5 volt side and you end up with a nice 12volt supply for your work bench. Some also have meters to let you monitor the current. Feb 23, 2017 the eez h24005 is not just another programmable benchtop power supply. Are you looking to build your own high wattage power supply. Making a power supply for use in labs is not an easy task due to the complexity of the circuit. Apr 05, 2020 how to build your own variable bench power supply using an atx power supply. And finally how to make lab bench power supply from computer atx power supply.
Its easy to spot that pin, because its the only one with a green wire going to it. A variable dc bench power supply also allows you to set a maximum current, so if there is a short circuit in your project the bench supply will shut down hopefully preventing any harm to some components in your project. Atx bench supply this is a great way to get a cheap lab power supply, and serves as an introductory project in electronics. Build a variable voltage supply for cheap ross wolin. Still, the nomenclature is useful, as even the heavy, highoutput power supplies have lots in common with their smaller cousins. Nov 03, 2019 if youre looking for an easytobuild device that outputs all of those common voltages we have already constructed a power supply using an old atx computer power supply. Heres a fancy way to convert an atx powers supply into a bench supply. Diy lab bench power supply using atx computer power supply. Are you looking to build it without having to spend money.
The term bench power supply here is used somewhat lightly, as some of the power supplies were discussing could be too heavy to put on a bench. Use an old atx case from a pc and a atx power supply and an additional 36v5a cc psu and convert these to a flexible labbench power supply. How to add variable voltage to your atx based bench power supply. The multimeter was used in parallel, together with the oscilloscope, to confirm the output values as measured by the digital bench power supply. As the current capability and number of output voltages go up so does. How to build your own variable bench power supply using an atx power supply. Some older atx supplies wont start without some sort of load. Apr 23, 2014 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. Use a pc power supply as a bench supply with the atx ps adapter.
This project was started a long time ago, and has only slowly progressed, but its now ready to be documented and shared with the world. Converting pc power supply to bench supply turn a surplus computer power supply into a bench power supply to run your amateur radio transceiver and other equipment overview this project will show you how to turn an atx power supply unit psu from a computer into a bench power supply capable of providing the dc power necessary to operate your. This instructable will show you how to make a professional looking bench power supply. Jan 04, 2011 i make bench power supplies out of atx power supplies for my friends. Dec 09, 2010 heres a fancy way to convert an atx powers supply into a bench supply. Home madedual power supply with atx switching driver youtube. W atx power supply quiet gaming 14cm fan dual sli ready for vga ati nvidia.
Jun 17, 2012 i would like to build a bench power supply for doing labs at home. I would like to build a bench power supply for doing labs at home. You can keep the 20pin molex connector attached and connect directly into it or cut it off completely and group together the individual wires keeping the same colours together, reds to reds, blacks to blacks etc. The exact parts list will vary depending upon what you want to build your supply into.
Hanmatek hm305p dc power supply professional,30v5a adjustable switching regulated power supply variable lab bench power supply with 4digit led display6 sets storage with pc software usb interface. Since i already have a power supply for my computer, i planned on turning it into a overpowered bench power supply. Converting atx psus to bench power supply major issues. The standard computer power supply unit psu turns the incoming 110v or 220vac alternating current into various dc direct current output voltages suitable for powering the computers internal components and with a little bit of imagination it is possible to convert atx psu to a bench power supply. Dc power supply, 30v 5a, lab bench power supply, 4 read out, variable and adjustable, switching style, 110220v with alligator leads desoldering pumps tweezers electrostatic bracelet.
This project includes features such as software calibration, programmatic control via usb raw hid, etc. Jul 24, 2017 this is a case for a bench power supply that uses a standard atx computer power supply and a dps 5005. In my sophomore year of college at the university of minnesota, i started into my main electronics classes, and needed a good power supply for working on the lab projects at home in my room. How to add variable voltage to your atx based bench power. Is it possible to use an atx power supply unit or psu from an old pc as a bench top power supply to power 5v logic, but with some limitations. And last pics are reserved solely for the start of this article the digital bench powersupply itself.
A computer atx power supply can be easily converted into a versatile and powerful power supply for your workbench. Find low everyday prices and buy online for delivery or instore pickup. Atx psu turned into an adjustable voltage bench supply. This guide has almost every atx computer power supply to bench power supply. Diy lab bench power supply make using atx psu including all steps of makingin this video i am showing you how to convert an old atx power supply unit into an awesome lab bench power. I was wondering what other opinions i could gather on a variable dc supply using voltage divider. Diy lab bench power supply make using atx psu youtube. Tg didnt just cut off the motherboard connector and add banana plugs, but improved the functionality. This design for an external adapter lets you use the power supply without modifying it. With some modifications, the psu can be turned into a good bench power supply. Every bench needs a power supply to fully complement the rest of its test equipment. Its a useful addition to any workbench, and its safe and easy to build. This guide has almost every atx computer power supply to bench power supply published to date on instructables as of dec 2014, about 70 unique instructables. In our experience most atx supplies dont require a.
However, there is an easy, cheap and readily availabl. Buy icstation atx breakout board 24 pin benchtop power board pc computer power supply adapter module 12v 5v 3. I really wanted to make a cheap bench power supply for use with my electronics project. Yes, the last picture is the very old photo of my first power supply, constructed a few years ago. I have modified a cheap 15v3a power supply to have that and for tests where i manual regulate the voltage, while power is on, that supply is my preferred supply. You can make an atx power supply that isnt connected to a motherboard turn on by grounding pin number 14 on the big motherboard power connector. Thats what i did actually an old windows xp desktop computer has now become a. I make bench power supplies out of atx power supplies for my friends. You can buy bench power supplies of course, but they are not inexpensive. There is a footprint for a 9 watt 10ohm load resistor on the 5 volt rail. Benchtop power supplies are in stock with sameday shipping at mouser electronics from industry leading manufacturers. Read 7500 times 0 members and 1 guest are viewing this topic. The dps 5005 gives you constant voltage and current modes, as well as various. One of the more popular projects for beginners in electronics is a power supply.
Look out for the power supply made for the cellphone repairmen. Aside from the atx power supply itself, we will need a few additional components to build our bench supply. Nov 20, 2017 there are a number of ways to convert a standard computer atx power supply unit into a usable bench top power supply. Nov 03, 2019 today we will build a useful bench power supply that thas both a fixed 5volt output and a variable 0 17volt output. Dec 29, 2019 in fact, if you have access to an old computer that is on its way to the junk heap you can rescue its power supply and put together a nice bench power supply for just a few dollars.
Bench power supplies are versatile, accurate and stable and dont cost too much. Please let your power supply discharge, completely. If youre looking for an easytobuild device that outputs all of those common voltages we have already constructed a power supply using an old atx computer power supply. Im not the first to use an atx computer supply top power my diy projects, but i believe the design i have chosen is great for both advanced users and beginners. I consider this to be just below the dmm in essential test equipment. You could build a separate board to run off the atx ps adapter as detailed in the first article below. Today ill share a project of converting atx psu to bench supply. 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. Hacked atx power supply with variable output voltage.
Thats what i did actually an old windows xp desktop computer has now become a useful addition to my workshop. Encyclopedia of atx to bench power supply conversion. Another atx bench power supply this atx psu bench power supply combines some of the best features of other designs i found on thingiverse. Enhance your bench with a lownoise power supply that is easily viewable from any. Convert atx power supply to bench supply dronebot workshop. Icstation atx breakout board 24 pin benchtop power. Convert an old atx power supply into a bench power supply. Programmable dc power supply 030 v 05 a hm305p variable switching digital power supply with pc software and usb interface. A simple alternative is to use a computer power supply unit psu. Atx bench power supply convert a computer power supply. Computer psus supply a good range of low voltages, which is useful for all sorts of smaller electronics projects.
On a bench or in a system, our dc power supplies are ready for your application offering optimal choices in voltage, current, capability, and precision. My roommate adam told me about somebody online who had converted an atx. Use a pc power supply as a bench supply with the atx ps. It was actually my very first successful electronics project. Because they are adjustable, they usually are supplied with a meter to show you the voltage the supply is set to.
Jun 19, 2011 and finally how to make lab bench power supply from computer atx power supply. So basically, my friend found a atx power supply and was gonna give it to me. The question arises, though, as to what type of supply and what features should be incorporated so as to make it as universal as possible. While its software, hardware, and mechanical aspects are designed to compete with any commercial offering, because it is fully free and open source, it provides a level of independence and hackability that simply doesnt exist with proprietary, traditional tools. To provide high current outputs, it needs heavy transformers and semiconductor devices. Aug 09, 2019 how to add variable voltage to your atx based bench power supply. Here is a dual power supply which is a bit different from the norm, it has atx switcher from an old computer which is converted to be variable in. Here is what i used to build my supply not including the materials i used for an enclosure. A power supply that if and when the atx power supply goes bad you can just unplug and replace it. They come with a 3 to 4a adustable output, an analog current meter that allows you to capture surge and know guess the state that the dut is, a volt meter input, a usb socket for charging need, a rf signal strength detector. A slightly more complex power supply than the battery eliminator supplies a constant, adjustable voltage. Any atx power supply can be plugged into the adapter. My idea is to run a vin from the 12v output of a molex connector from the psu into a voltage divider with a 1m ohm variable.
In its simplest form, it is very affordable, but can be easily scaled up to a larger, more powerful unit. Atx power supply minimum load electrical engineering. This is a case for a bench power supply that uses a standard atx computer power supply and a dps 5005. Computer power supply has a big high voltage capacitors inside, that could hold a potentially deadly charge. Aug 06, 2017 articles related to diy benchtop power supply atx. Aluminum dual chamber open framebench table atx case, supports sli cross fire vga card, max. So i converted an old atx power supply into a bench power supply. There are several large capacitors in atx power supplies, that will store a dangerous charge for a long time. Today we will build a useful bench power supply that thas both a fixed 5volt output and a variable 0 17volt output. Converting computer atx power supply to lab bench power. It was a nice unit, i even added an ammeter to it so that i could measure current. How to build your own variable bench power supply using an. I decided to convert them into a bench power supplies, or at least make a project box they can plug into that would expose the different.
It should be interesting to both those who want to do a conversion, and to those inte. Without decent powersupply its hard to play around with project ideas. In my sophomore year of college at the university of minnesota, i started into my main electronics classes, and needed a good power supply for working on lab projects at home. How to convert atx psu pc power supply unit into a cheap bench top. I could have guessed you were not into the cheap stuff, thanks for the answer. The standard computer power supply unit psu turns the incoming 110v or 220vac alternating current. Read about how to convert an atx psu into a bench power supply on.
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