20 Amp Battery Charger with Computer Power Supply - 220v AC to 1.5v / 3v / 6v / 9v / 12v / 24v DC

In this video I am going to salvage components from an old CPU and I am specially interested in its power supply because the computer power supply has a variable output such as 1.5 volt, 3 volt, 4.2v, 5v, 6 volt, 9 volt,12 volt, 24 volt and all this at very high 20 Amperes.
It takes in 220 volts from the home socket supply and converts it to variable DC so if you have one never throw it away.
Also in this video I am going to test this 300W power supply on several DC Motors and also make a 12 volt battery charger with it.
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---- Thanks A Lot For Your Love & Support Guys ---
#batterycharger #powersupply #universalcharger #12v #cpusupply

[@MrElectron]

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[@mthompson965]

Purple Wire is “5v Standby” it gives constant 5v/2A while the supply is plugged in (even if it is turned off) Grey Wire is “Power Supply OK” it gives 5v when the power supply is working correctly.

[@dnc23x]

thank you sir! useful info

[@engineerkohat]

Great work as always. I also have a battery charger for my 260Ah battery. That seems like a PC power supply but inside the power supply case I fixed a specially designed charger circuit which is awesome. That charger have great features like anti spark, reverse polarity protection, charging control, current limitation safety and much more. A regular PC power supply don't offer such features.

[@imtiazmaniofficial4441]

GOOD

[@ionmarius6652]

show us your project!

[@usmann8927]

Show us yours

[@engineerkohat]

@@ionmarius6652 sure. One video is available on my channel. More videos with reverse engineering as well as circuit diagram, I will upload soon on my channel.

[@nagarajmv4537]

M;

[@kumarjakke]

It's an intelligent usage of SMPS with its different combinations of power supply. GREAT

[@gonzalomedina6378]

Congratulations for this video. I am a follower of your channel for two years ago or perhaps more. I have seen more than 40 videos about computer supplies but no one with this focusse. Very interesting and practical!!. Perfectly explained as always. Thanks and continue . Greetings from Madrid. Spain.

[@kikofras]

Ive just made a multi volt charger with this video. No tenia ni idea quw se podia usar asi

[@dipansukhrolia1782]

Ka0 aap pp0LlLLLoLLLKIIIIO@@kikofras

[@dani_____mughal509]

grt✌

[@guiller2371]

Yes, great video

[@MikeTechnology]

Well that quite interesting i forgot that you can take the -12 v blue wire and as well the 12v to make up 24 . But the -12 will not give more that 0.7 to 0.9A usually better tap on the transformer or better you can reworked a bit but that mean you have to remove the supervisor ic . Got mine simple one done few year's ago . Great work

[@OregonDARRYL]

I had no idea you could get so many voltages with different combinations of wires. Awesome!

[@blesroy1090]

you are funny...….

[@kattegat970]

Damn!, thank you very much. Finally i found a video on you tube explaining how to reuse this power supply. I saw a lot of videos in spanish (my native language) and nobody showed simple examples like you. Greetings from Venezuela. Suscribed.

[@egghead971]

It's worth a mention that the output power of -12V/-5V lines doesn't scale up with max power output of the PSU. They are limited at 6W/2.5W power output (@0.5A max current, as in your case), even if you have a 400W model. And that limitation carries over to any combination you'd use them in, for example the 24V. So "... 24 volt and all this at very high 20 Amperes" is definitely overblown.

[@CMTEQ]

Correct, For example if the +3.3V gives you 24A and the -12V gives you 0.5A, you are basically limited to the 0.5A, using that combination to charge up your battery at a rate higher than 0.5A will destroy the PSU.

[@thomasalfoldi2121]

One of the few that properly explains his work, I'm the total ignorant on electronics, but these explanations make me understand everything better.

[@kennmossman8701]

sadly this guy does not know what he is talking about

[@muhammednihal2804]

Wooow superb . I finally found a video about a great power supply . Hats off bruh ❤️❤️❤️❤️❤️

[@RiccardoRivi]

The purple wire Is 5v too, It always outputs 5v even when the green wire isn't shorted to ground

[@reinagam6423]

Muy buen tutorial, te felicito y a la vez te agradezco por compartir con los que siempre buscamos que aprender algo más de la forma tan sencilla y amena, un fuerte abrazo desde Perú

[@BarkatAli-pp9gt]

Par Excellent Informative Video you have made seems you have digested this particular knowledge & expressing with quite ease! Admirable wisdom a true Teacher must have!

[@starbravo672]

Thanks for your video. I learned a lot.

[@trevorvanbremen4718]

Be VERY careful... For example, the -12V (blue wire) is only rated for a VERY small load! As for the two 'unknown' wires: - the grey is a 'Power-Good' output (to tell the computer MoBo that the supplies are all 'stable') - the purple is +5VSB (it's the 5v 'standby' voltage which is present even if the green 'start' wire hasn't been grounded)

[@guiller2371]

In computer classes, we were always told, never open your power supply, neither your monitor. At that time, the monitor had the big cathode ray tube. And the power supply had some cooper wiring and capacitors.

[@marcoshernandez4067]

Excelente tutorial maestro me ha facilitado mucho trabajo muy bien explicado estoy suscrito para sus demás vídeos exelente

[@thabed007]

hey hey, i just discovered your channel today, and so far, really great content, i also love recycling old electronics to experiment and make new stuff with it!! And if you haven't found out yet, i also wanted to tell you about the purple and grey wires because they can be very useful, the grey one is called "power good" and is used for safety, when you turn it on, the psu as a self test fonction that verify that every rail output the right amount of voltage, if everything is ok it will output +5V after a few milliseconds, but if something is wrong it will remain at 0 and a pc won't turn on, in a project like yours, you could use it with an led to make sure everything is ok before using it, i'm sure a more advanced user could even use it with some transistors to prevent part of a circuit from turning on if something is wrong!!!! the purple wire is the 5VSB(stand by) and could be used to make your projects a little more fancy if you ever want to go that way, it's the only wire that will still output 5V even when the psu is turned off(but still plugged), a pc use it for a bunch of things, like keeping the battery charged, powering the mobo's led, sleep and wake up functions, etc.. it could be used for any number of things in a diy projects, from a simple always on led, to a more complex circuit like a clock, or even power a microcontroller... basically, anything fancy you'd want your project to be able to do while it's main part is off, you can, so long as it doesn't require more than 5V!!! XD Anyway, keep up the good work, i love watching electronic videos while i'm working on something too, specially when it's about recycling old stuff into something new and useful, because not only is it fun, it can help to save the planet a little and even save you some money in the process!! XD

[@abdul_samad2708]

Thank you so much bro, I searched Wikipedia for this info and all it told me was Power Good and Standby respectively. I didn't know what it meant but you explained it really good and in an easy way. Thanks Again

[@thabed007]

@@abdul_samad2708 no prob, i feel you bro, had to search for a while just to piece together scraps of info from here and there just to get the idea, experimentations had to fill the gaps!! XD

[@abdul_samad2708]

@@thabed007 Lmao yes... Thanks again brother

[@uncontrollabledogs3791]

This is a great video. So glad I found it. Best how-to vid out there.

[@Tankwiper]

Don't charge lithium cells with constant voltage! It will probably draw tens of amps. They must be charged with constant current. There are cheap CC buck converters for that purpose.

[@shoaibafridi7208]

Bro amazing what a clean and smothly way to explain every thing ...🙂👌👍🏻👍🏻👍🏻

[@abdulrahman-wx8hq]

Good job 👌👍

[@shiro214okane]

great video I've learned a lot!

[@MasterT2]

@9:10 what diode being used?

[@husenalhanen579]

Very good video thank you so much my friend for this information ♥️♥️♥️♥️♥️♥️🆗️👍👍

[@myownpath8022]

I made an electrolysys power supply it works good for remove rust

[@Ghostgaming-kt4el]

Where can I get this kind of old cpu and the purple wire is standby 5volt from the 3amps diode

[@vishnuponamala]

Thank you so much Mr, your voice is so good, i like your voice

[@vinaysripada5919]

What is that diode used for 12v battery charge

[@bhawanasingh6179]

which daoid are you use in 12v ups battery to controlling DC power?

[@mrigankasinha1454]

Very very nice 👍❤️🙏 Clear explanation thanks you

[@Versatech17]

There's no overcharge protection for that?

[@bubblegum1792]

Thanks a lot You just saved me 100 $$ by blue and yellow wires.😂😂

[@onyilikeernest1044]

Thanks Sir. This ur video is transformative.

[@rafaelbezerra8008]

Show 👍

[@prabhsimransingh2730]

Plz see carefully that it is rated only 0.5 A for -5v and -12v. so if you want to use -5v and -12v in combination then you can draw only upto 0.5A. Otherwise you may end up with damaging it 😌.

[@josephsom1571]

kounsa diode used karnhe.? value a lag a lag hota he

[@krishnagamerz3438]

Love you bro , finally I am not opening my computer ❤❤❤

[@abdul_samad2708]

Thank you so much brother, this has helped me a lot for my project.. Hoping to see 1M soon, you got a sub too now! ;D And for those who are wondering, this is a ATX Power Supply which means that it has a wire which can keep supplying +5V Battery even if its powered off and that is the Purple Wire which does that. The Gray Wire provides +5V if all the other wires function correctly.. I can't go any simpler than this. And big thanks to @sBeDs in the comment section below, he helped me figure this out and I am spreading it forward. I love your videos and I like to recycle old used products and this has helped me create a computer fan powered without a motor but with a power supply. Love your vids, keep doing what you're good at.

[@franklinrios2612]

good afternoon, greetings from Venezuela, your tutorial is very good since it has given other voltage options that others have not said. not getting a 6a diode that someone else could place to charge a cell phone battery look for information and there is a 1000v nte5817 and 100v nte5815 that are equivalent but I can't find them either please I listen to suggestions thanks.

[@mrgoodman6620]

@ 24v it has very few amps. Im surprise it survived being connected to that big motor!

[@Baluchishair]

Is it really possible to charge a 175ah battery with this powersupply? I mean a light truck battery can be charged with this method as you said in the last part of the video take negative 12 put a doid in between and take the +3.5 to charge the battery?

[@turbo-v9319]

should we use protection circuit for lithium ion batteries?

[@scotthenderson4376]

Can you use this to charge /test lithium batteries ? Would a buck converter and potentiometer do the trick?

[@gloubiboulgazeblob]

I think (not 100% sure) the 2 unidentified wires are most probably connected to PGI and PGO pins of an integrated circuit supervising voltages (PGI = "Power Good Input", PGO = "Power Good Output"). That kind of IC monitors voltages (Over Voltage Detection, Under Voltage Detection, etc...), and is often an 8 pins IC in relatively recent PC power supplies, and is located in the secondary part of a power supply

[@SedatedByLife]

Need to be very careful charging Li-Ion batteries. They do not like continual charge beyond 4.2V. Need to add in a voltage cut off circuit set for the nominal 4.2V.

[@flyingfalcon5065]

Will it be safe to run any appliance like motor etc if i connect different output wires to add up voltages by combining them? Pls ans.

[@bayanicruz8914]

Can u use that to increase in regulated 13.8volts thank sir..

[@iikmubarakachmad3054]

hi, please let me know, rating current -12V polarity is < 1 A,, how is it work become 20A if we use it together with 12V polarity

[@eezmo2114]

What is the description of that diode you using please.

[@stefanmilanov5342]

Is it possible that I didn't manage to start the 12 volt motor around 150w because I didn't separate all the wires separately by color? thy

[@digitalcricketer]

Dose it is same for my model st_300blp

[@King.DAVid.III2022]

Some of the fans you can get two speeds, USB 5 volt, or 12volt high speed put in a cooler with ice you have a simple ac unit

[@LofiPlay9998]

Nice❤️

[@medar6651]

It would have better if you tell us about the Amps on each combination to better use it

[@chalokips7712]

The Atx power supply you have constructed is it capable of charging a 70 amps battery to 100 amps battery 12volts

[@edwinubod0405]

your video is very good but dangerous action and no safety. to understand it i need to play many times and write some notes and drawings. thanks for sharing. i'm computer technician

[@stupidehumanite]

🤔 Before cutting the connectors, try to learn of them. This will avoid the problem you encountered with the 2 unknown wires.

[@jesjames]

As others stated the -12V cannot carry much current. It's a single wire, I can't tell what size those wires are, maybe a 22AWG, that is a 0.6mm2 wire rated around 0.9A for power transmission.

[@JessAnalysisTV]

very informative.

[@willianvillegas1103]

Gracias,muchas gracias, saludos desde Venezuela

[@clashclans3448]

Can i put the yellow for + and the black for - on the battery?

[@accounts1298]

Which diode you use for charge 12v battery

[@clark2711]

Excellent video, I always checked power supply the usual way and never really thought of checking such combination of wires. Blue and orange seems perfect way to charge up 12v battery (and packs), although I wouldn't recommend using it unless you've BMS installed. What is the value of diode you used to drop voltage?

[@s.anzerali3645]

good work provided detail this will help a lot

[@chriskassarjian8248]

Is the node necessary and will any node work

[@eletroprojetoseinvencoes7031]

Muito bom amigo..

[@lolgamerslol5248]

The Purple One is 5v StandBy which means if the Green Wire isnt connected to ground it will still output 5v the Grey one is P.G(Power Good)

[@David-bc4rh]

glove on the left hand. I gash my fingers real good while harvesting parts from sheer sheet metal housings, and now I have scar tissue in enough places that I don't need gloves.

[@ravidhana7978]

Super message thank you sir 🙏

[@alihaider-cl9pv]

Great job as always, I m a big fan of yours but bro just tell me from where we can bye that variable power supply which is shown may be in your each n every videos 😉😉

[@fakapachuau7943]

What a great things you have done...

[@natangburek8979]

When u charge battery 12 volt that black diode on terminal negative what it functions? Is that necessary when charging 12 volt battery?

[@mirali4930]

I have a question can we used 6a diode in series in gyser element 3000w ac to run as 1500w ac . plz reply if this hack is work how many diode in parallel we have to used.if possible with pratical video .

[@PF-gi9vv]

Its not a really great sandwich, its a really great power supply @12:11

[@uppalapatisatyasaibaba2012]

Good

[@sddiymakeitworthit7512]

Amazing workpiece awesome 👏

[@kamalbsulaiman4583]

Awesome nice work and how do you make 24 volt while the power supply is 12 volt?

[@antoniskonstantakis5474]

You can't.

[@vishaldevganLove]

I also have the same power supply

[@AliasgarLimbona]

What diode you use?

[@dogeeecart6082]

whats the output power and current of 24v because my power supply gives 12v 14A and -12v 300mA

[@julianslab1511]

Nice

[@fjanaka]

My power supply indicates a minus 16v when connected to the blue and red in the multimeter but yours show a positive 16v. How come?

[@ayeshatabish28]

how will you controll amp.

[@najam121]

how did you run motors on 24 volts and most PSUs only allow 0.5 to 1 Ampere on -12 volt relay.

[@abdulrahman-wx8hq]

God gives for your more knowledge

[@Dinco422]

When I connect a cordless drill motor to the 12v line it just shuts off the PSU like a short protection... why ? The motor is rated for 12v It works on the other lines like 5v, 3.4v

[@smasher2265]

i would like to try this, but im no expert, how can i find my -12v and +12v? i would love to see if i can make an 24v dc output for a pc wheel because theres not a single 24v unit at sale where i live

[@guywhoknows]

The problem you have there is over current when charging. You could easy cause a fire and buckle the plates in a battery.

[@David-bc4rh]

Correct. This is a demonstration on a desktop PSU versatility as a bench power supply. aMany modifications are required for any of this to be safe. Mods are easy when you salvage.

[@guywhoknows]

@@David-bc4rh should have a current measure and current limiting circuit , this is fairly easy to do. Of course you could cut all the wires, tap into the 12v rails and run a variable buck boost with display and current limit function. But then you could use a fair few power bricks to do this even a old laptop charger.

[@sunilankada8072]

Sir how to repair the SMPS ? please explain me

[@MrTimjg123]

hi could you please tell me the exact name credentials of the diode so i can buy the right ones thank you

[@Bianchi77]

Nice video, thanks :), suggestion, add extra fuse for protecting your PSU.

[@mbtechnology134]

Good video

[@user-kz4pe5nd1f]

احسنت ستاذ شكرا الك لي نشر العلم لي ناس نود منك المزيد 🙋‍♂️

[@nikkarbo4664]

Come puoi controllare la corrente di carica?

[@mdirshadhussain9385]

can you tell that diode number you charging UPS battery

[@anushageethanjali1920]

Dear sir can i run dc inverter ac compresar use this?

[@lolgamerslol5248]

Man you could fly with the first motor with the fan if you use 24V LOL

[@thebroki6684]

BIEN EXPLICADO MASTER, EXCELENTE APORTE, GRACIAS...