DIY Lab Bench Power Supply | Computer ATX Power Supply Conversion in under $10

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In this video I converted a Desktop/PC ATX power supply to a fixed lab bench power supply that can output -12v,+3.3v,+5v and+12v, and insane amount of current. The comoponents requierd for this ATX Power Supply Conversion are really inexpensive and with commonly used tools. I also added a USB port functionality to this ATX power Supply.
Schematic: easyeda.com/normal/Wiring_Dia...
International Purchasing Links:
Biniding Post: www.banggood.com/4Pcs-Speaker...
Heatshrink Tubing: www.banggood.com/Soloop-328pc...
LED: www.banggood.com/375Pcs-3MM-5...
Power Resistor 5Ω 10W : tinyurl.com/z6cdtcd
Toggle Switch: www.banggood.com/Red-3-Pin-ON...
Mains Switch: www.banggood.com/5Pcs-Black-P...
USB Female Port: www.banggood.com/10Pcs-Type-A...

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Опубликовано:

7 дек 2016

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Комментарии : 130

@saadaamir 7 лет назад

Thanks For Watching Guys! let me know in the comments what project you want to see next :)

@TheWhiteAfghan 7 лет назад

Saad Aamir nice video. if I want clean 12dc do I use yellow(+12v) to black (ground) or yellow(+12v) to blue(-12v) ?

@saadaamir 7 лет назад

ram dat +12V(yellow) to ground (black)

@LandonStewart 7 лет назад

I'd like to see how, on a budget, one can make the +12Vdc adjustable from zero up to +12Vdc.

@TediChannel23Ja 6 лет назад

+12v and -12 give 24v

@michael2abdelmessih 6 лет назад

Saad Aamir Hi Can I make two 12 v I mean i have 4 yellow wire use 2 yellow wire only for each one

@FLABrowncoat 6 лет назад

There are a lot of videos making power supplies like this, but yours is easily the most thorough and concise. Thanks for posting this!

@peterfitzwell9658 5 лет назад

I agree

@ghazimalik 2 года назад

The best video and the original for of ATX power- supply to a bench power source

@petergaiser8497 5 лет назад

Good workmanship, well done

@ronsites2694 5 лет назад

Clear, easy, instructive video, thanks!

@jkingchapman 7 лет назад

Well done! I'm definitely subscribing.

@mikewinn7476 7 лет назад

Thank you for this well done video and wire diagram, it made it easy for a beginner at electronics to do. I did a couple things slightly different as mine is for a singular power supply for a car radio and phone charger to use in my workshop. Thanks again, Good job.

@chaserichter2061 4 года назад

im just now watching this for the first time. I gotta say BRAVO.... You did a great job my good friend. Im bulding a custom benchtop power supply unit myself. Im having issues installing my LED power on lights. Like im not sure how or where I want to place them yet, but im going with the 3.3v and 12v outs and the 5v will be USB. I also had to put my fan on the outside top of the unit also. im also adding a 110v ac plug for my soldering iron. ill take a picture once fimished and upload it to my comment if it allows me to.. Thank you again my friend, you gave me some great ideas on mine and a few extra ideas.. Chase R from USA, Ohio.....

@robertcartier5088 3 года назад

Using the project to power the label maker was a brilliant idea! ;-]

@malcytull 5 лет назад

Nice job, thank you for posting.

@ronsites2694 5 лет назад

Nice job, thanks for the video.

@sylvianederlander2317 7 лет назад

Great job!

@naderhumood1199 5 лет назад

Exellant job Man

@danmollette8552 4 года назад

Great Video!

@veeem3964 2 года назад

Good job 👍 keep it up

@naderhumood1199 5 лет назад

Super smart job brother. ...👍

@MarkDuffie 7 лет назад

I'm working on making this myself. I just need to order some of the little parts like the resistors and diodes. Then I'll be good to go. :-)

@mikhstrat8538 7 лет назад

Hi Saad, great tutorial, very easy to understand & well laid out. In my case I have a Coolmax V-400 PC power supply. The 3.3V line is 30A, which is higher than the 5V(28A) line, and higher than the 12V1(14A) & 12V2(15A) lines combined, but the 12V lines together have the highest wattage. I am a little unsure of where to draw from for the Led input and the 5ohm resistor. Maybe second guessing myself, but most of all just don't want to screw it up since it's a nice unit to be working with. Any thoughts?

@gradyshades6535 7 лет назад

Best video I've seen on this project. Great job very informative, and your ability to explain things as simply as you do assures me that you have a understanding of why you do something instead of just it goes here because they said so. Thaks a million. I would like to find out about getting more power from other sources like to run cordless tools that the batteries are too expensive to replace also run laptops????

@pikifrino 6 лет назад

Very good, thank u!

@pollydor07 7 лет назад

THANK YOU SO MUCH

@Mido0Rady 7 лет назад

awesome!

@its_just_me_ 6 лет назад

Subscribed!👍

@SergioCM_ 7 лет назад

nice video !... one question: what about the missing ground connection for that label maker while printing?

@sikandarwaheed7164 7 лет назад

very good and thank you

@msqvlog 6 лет назад

Loved it

@TexasStatesman 5 лет назад

In your list of supplies and on the schematic you have the power resistor as 5ohm 10 w, but the link you have 10ohm 5 w, can you confirm what the correct item is. Thanks for the video.

@wesmiller6762 7 лет назад

I have a recommendation the only thing I would add not change to everybody's RU-vid power supply conversions is use a plastic back plate on the outside face under the binding post. I know that you're supposed to use banana clip leads but when people perform projects a lot of times they just try to wrap wire around it, and spark or ground against the back plate. Just an idea not that what's been done by anybody is wrong or use it wrong. Your videos are awesome and your conversion is awesome and clean good job I've watch this video a few times I like it.

@saadaamir 7 лет назад

Wes Miller Glad that u liked the content and Yes you are absolutely right about the black plate thingy.

@Prompt24 6 лет назад

Wonderful.

@AidenJooMV 3 года назад

Cool!

@sameeransari7004 7 лет назад

Best video ever!

@memyselfandi6422 7 лет назад

+Sameer Ansari *"Best video ever!"* I think that your statement (above) is an extreme over exaggeration.

@JerrySmiler1968 7 лет назад

The unit I have has 18A on +5V, 20A on +3.3V, 18A on +12V1, 18A on +12V2, 0.3A on -12V and 2A on +5Vsb. Does it matter which one (5v or 12v or 3.3v) the dummy load is on? I have yellow wires and yellow and black. I'm assuming the yellow will be 12v1 and the yellow and black will be 12v2. If I combine them could I theoretically have 36A?

@mdemers767 3 года назад

So I got done with this project, and while it works, it's putting out some odd voltages. I'm getting 6.7, 10.7, and 26.7! About double what it should be putting out. Also the PSU's fan doesn't come on. I'm guessing it was probably junk before I got started. I'll run it til it conks out though, just can't use it for any precision stuff. Good thing I got it for free, just wish I had tested it out before putting the effort into the conversion. Any suggestions to what might have gone awry are welcome, whether it's the PSU or something I did to it.

@crazyskull88 7 лет назад

Hey whats going on Man , is there any way you can make a video or provide any info in how to add a voltage regulator to the pc power supply please i already made the one the looks like yours i am just having an issue trying to regulate the voltage from the 25.90 to 3.0 v

@pythoneatssquirrel 2 года назад

I have a psu that worked, connected green to black and it turned on the fan. After cutting the wires, when I connect green to black, it spins the fan for half on sec and then it stops. And idea? The purple 5v has power for an led, but the other wires stop after half second

@peterfitzwell9658 5 лет назад

What does the power resistor do and is it absolutely necessary?

@AbuMona81 6 лет назад

Why use gold resistor? And what is the value.

@MCsCreations 7 лет назад

Really nice, man. And great job! :) I'm going to make one for me as well... Just didn't understood where that wire you add to the back switch came from. :/

@saadaamir 7 лет назад

MC's Creations i just rerouted the live wire (or hot wire if you are in USA) through the switch.

@MCsCreations 7 лет назад

Saad Aamir Oh, thanks!

@saadaamir 7 лет назад

a saka yes that's correct

@tzutzyalex 7 лет назад

So I got an old PSU which I know for sure works(i powered the PC it was in on before modding it) but after connecting all the stuff you mentioned, when i plug it in it just wheezes and does nothing(not even the 5v standby works). The wires are the right colors since they're labeled on the PSU case, I tried both 5W@2.2ohm and 10W@4.4ohm dummy loads on the 5V wire, and I still get nothing but wheezing. What could be the issue? Thanks a lot!

@djscottdog1 7 лет назад

Looks good , got a wee sub from me

@robertcartier5088 3 года назад

Very nice! ;-) An opinion: Using the red wire to power your Power On light (Green LED) is fine... But if you had used the Grey wire, you would not only have confirmation that the power is On, you'd have confirmation that the unit is operating withing specs! Isn't that worth having? Anyway, something to think about. Cheers! ;-)

@iosonodetectiveconan 7 лет назад

is it ok if i dont put any resistor or diodes?

@sriyantra1939 5 лет назад

I want multiple USB atleast 4 each 2 amps to 3 amps on 6v, and 12v. 2 nos for charging batt.. suggest a circuit

@maxwarfield6699 4 года назад

Great video! I would like to replicate this project but I am a novice, where can I find the schematic? Thank you kindly

@tiopootter6212 Год назад

Porque en el puerto usb le conectaste 2 cables juntos

@telstarvision1509 4 года назад

what about the dropper resistors for the leds if you don't install any your leds will fry themselfs to death

@gstephen5sdg 7 лет назад

Good job, but may be less music please. :)

@hanspijpers2100 3 года назад

or even better no music at all, I think most people watch these video's to learn and understand , and not to be confused by "music" which by the way is far far away from my taste . So to me it is annoying However the video is good, So I have to watch it with subtitles. not ideal but it works Kind regards Hans

@ledhie 7 лет назад

On information at 1:50 mention that Purple for Aux (USB) , but at 5:0 you connect Blue wire (-12V) to USB + piece of purple to connect to LED

@saadaamir 7 лет назад

ledhie i am not sure what you mean. But here is the schematic. Hopefully it will clear things up easyeda.com/normal/Wiring_Diagram-f07c700c6f1545a2a8453c2cb63f1157

@ledhie 7 лет назад

Many thank's for schema,

@diegorambo2569 3 года назад

Thx u so much for this atx power supply ^ ^ I will build one as well : ) I have only one question for the USB output, would it not be better to use a Red 5V cable ??? I think the output would be stable 5V. Greetz Diego

@DuroLabs85 3 года назад

You can use it but there always very high current on the red wire which are 5v they can deliver above 20amp easily if you connect something incorrectly you can blow that device up

@ahmednabriss7803 3 года назад

Sorry ... Loading resistance is what for?

@IsMefufu 7 лет назад

Great Vid!!! But my old power supply doesn't have a brown wire. is that ok to continue the build?

@saadaamir 7 лет назад

IsMe Fufuknox Yeah, It shouldn't be a problem.

@DuroLabs85 3 года назад

the brown wire is for 3.3v sense wire which connects to 3.3v wire to sense it

@mkunboxing 7 лет назад

what is thamilode

@PROSTO4Tabal 3 года назад

WHAT IS MUSIC NAME PLEASE ?

@MohammedRiad 7 лет назад

i have 12v rail has 16 amp and -12v rail has 0.8 amp if i use 12v and -12 i get 24v but how many amps ??

@TediChannel23Ja 6 лет назад

Mohammed Riad As much as blue wire 0.8Amps

@BrianThomas 5 лет назад

How many amps were you getting. I find projects like these great but if you're amps are low you're not going to be able to power some projects. How do you over come this?

@DuroLabs85 3 года назад

this atx power supplies can handle well above 20 amps on each rails

@brunoc9376 7 лет назад

why can't you just use the factory main switch to get into standby mode? why did you add another one? I'm confused since I don't see how you wired it in the schematic and if I wanted to use the factory main switch, how would I wire it or leave it as is?

@ziggydiaz7601 5 лет назад

Since this is a recycled PC power supply, in the original configuration there was a PC on button, these two wires green to black are those power on/wake up trigger for the power supply to energize all outputs. As he said in the video, if these two wiresare not shorted you will only see 5v from the aux 5v out as long as the power supply mains switch is on and plugged to line voltage.

@utpalrathod415 6 лет назад

what is need of 10w/5ohm dummy load resistor you connect.

@mkjr 6 лет назад

Most modern ATX power supplies require a small load to stay in the ON mode for more www.instructables.com/id/ATX-->-Lab-Bench-Power-Supply-Conversion/

@Keith98765 7 лет назад

The Power Resistor in the video looks like a Arcol HS25 Series, rated at 3.3Ω ±5% 25W. The description says 5Ω 10W, while the link is to a 5W 10Ω. Which one do we use?

@saadaamir 7 лет назад

Keith Tank yes you are correct. The reason i used that one was cuz i had that one laying around. The point of the power resistor is to keep power supply stable during low current draws. So generally speaking 5ohm 10w resistor would do the job going any lower than that wouldn't effect to power supply much.

@mariomitterko3175 7 лет назад

If you connect 2pcs of 5W 10Ω in PARALEL you will have 10W 5Ω resistor. If you can you can use one of fthis 5.1Ω 10 W alluminium resistor www.ebay.com/itm/182372944803?_trksid=p2057872.m2749.l2649&var=484934906347&ssPageName=STRK%3AMEBIDX%3AIT

@khalidbouazi8039 7 лет назад

Saad Aamir my power resistor gets really hot after a minute, probably about 80 °C. I connected 12V to the resistor. How can i reduce heat? Its a 6ohm 25W Power resistor.

@azadazadi5895 7 лет назад

thanks .I have a question . -12 What Consumes

@DuroLabs85 3 года назад

they use it for opamps which need +/- 12v

@fookutube501 7 лет назад

Hi i have a question about the resistor.What do you think i should use on this one .......SPEC are (+3.3v -30a) (+5v-30a) (+12v1-22a) (+12v2-20)...Would i need 2 resistor for 3 and 5

@saadaamir 7 лет назад

Fook Utube one should be fine on the 5v line

@fookutube501 7 лет назад

Thank you Saad...

@ahmadsaki9625 3 года назад

Can you send me a map of it, thank you

@PsSarvna 7 лет назад

I want 24V also, can I connect 2x12v wire (yellow-(black&yellow)-black) to get 24 v

@sjanst 7 лет назад

That's not how it works...you need a boost converter for that

@PsSarvna 7 лет назад

SjanST Official thanks for your reply

@TediChannel23Ja 6 лет назад

To get 24 volts u need to connect a yellow wire and the blue wire to the load but the current will be low

@DuroLabs85 3 года назад

dont do this you will short your supply very badly

@user-su2zv3vw9q 3 года назад

The pc power stops for a period of time when the +,- is shorted.This is a little uncomfortable in the experiment

@mridulmirza3223 7 лет назад

can I charge my 12V battery and 6V battery same time

@saadaamir 7 лет назад

MRIDUL Mirza it depends what battery type it is

@riloariichoariicho884 5 лет назад

Sir,what is the difference between -12v and +12v. Hopefully waiting for a reply. Thank you

@josemoreno3611 5 лет назад

If you connected together like +12v in the positive and the -12v like negative you make 24 volts.

@RC-Heli835 5 лет назад

What is -12V good for? This is very nice!

@AidenJooMV 3 года назад

I think that's for devices needed reverse voltage

@AidenJooMV 3 года назад

Or test reverse voltage protection circuit

@mkunboxing 7 лет назад

what is gold one thing

@mkunboxing 7 лет назад

is the power resistor is necessary

@mahmoudessam1162 7 лет назад

excellent ... from where you get this little printer ? And .. what is it's name ?

@saadaamir 7 лет назад

Mahmoud Essam it's called a label maker. You can easily find it on amazon, ebay. etc

@mahmoudessam1162 7 лет назад

Thank you friend

@TheBlakemt 7 лет назад

for real dude?

@thespiritof76.. 5 лет назад

I didn't know you were supposed to use your sisters hairdryer. I've been just using the soldiering gun that's always heated when you use heat shrink

@mdemers767 3 года назад

Bic it!

@stephanc7192 5 лет назад

The 5v standby rail is not well regulated. Will not plug an expensive cell phone in there !

@AidenJooMV 3 года назад

I think -12v is ground

@DuroLabs85 3 года назад

no it is negative 12v

@BagindaMangaradja 7 лет назад

where the schema...??

@saadaamir 7 лет назад

Sorry for the late reply. here you go. easyeda.com/normal/Wiring_Diagram-f07c700c6f1545a2a8453c2cb63f1157

@BagindaMangaradja 7 лет назад

thx u

@maynardaba9939 7 лет назад

just wondering newbie here sir. what if there's no BROWN WIRE, how do i locate -3.3v??

@DuroLabs85 3 года назад

there is no negative 3.3v the brown wire can be sense wire for 3.3v rail

@BrianThomas 5 лет назад

Why would you want -12 volts?

@josemoreno3611 5 лет назад

You can make 24 volts .

@BrianThomas 5 лет назад

@@josemoreno3611 I'm really sure I'm picking up what you are putting down. Would you be willing to explain a little further?

@josemoreno3611 5 лет назад

If you conect one of the +12v like positive and you get the -12v connected like ground you will get 24 v.

@BrianThomas 5 лет назад

@@josemoreno3611 I just learned something. I never knew that. Thank you very much for explaining that.

@DuroLabs85 3 года назад

they use for opamps which need both rails +12 and -12v

@steveeb00 4 года назад

Only under $10 if you live in China

@JerryDodge 6 лет назад

$10 for parts and supplies... assuming you have all the hundreds of dollars worth of tools...

@Really2950 7 лет назад

Original video you copied from was better

@terencebarfield5864 7 лет назад

please do we have to be brain washed with this crappy disgusting music >> how can one concentrates on electronics

@oturanboga6225 4 месяца назад

@user-zo3og4od3u 7 лет назад

very good and thank you

@AbuMona81 6 лет назад

على عثمان ليش استخدم المقاومة الذهيبة ووصل السلك الاحمر والاسود؟ هل ضروري اضافتها؟ وكم قيمتها ١٠ او ٢٠ واط