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

[@MrElectron]

BEST BATTERY CHARGER DIY VIDEO - kzbin.info/www/bejne/kH-WpJR_gceMi9ksi=9_nLu0vKOqfn4zi_ Join this channel to get access to perks:* kzbin.info/door/WFbPzBb7dCyCWuBA-DBrMAjoin *Mr.Electron Patreon's Page* - www.patreon.com/mrelectron *Hindi Channel* - www.youtube.com/@Mr.ElectronHindi *Alternator Channel* - www.youtube.com/@mrelectron_alternator *Watsapp Channel* - whatsapp.com/channel/0029VaQmmRaFCCoWOf7huh3G

[@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;

[@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

[@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

[@kumarjakke]

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

[@OregonDARRYL]

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

[@blesroy1090]

you are funny...….

[@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

[@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.

[@RiccardoRivi]

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

[@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

[@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.

[@muhammednihal2804]

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

[@kohkhoon5396]

You are lucky that the very old capacitors didn't explodes :-)

[@kennmossman8701]

NEVER re-charge batteries as described. Use a charging circuit to limit the current, have a proper charging cycle, and shut-off when charged. THE METHOD HERE IS AN EXTREMELY UNWISE.

[@mostlypeacefulmisterputin]

You cannot desulfate the plates of a lead-acid battery with a regulated charge. “Smart charger” doesn’t mean better charger

[@kennmossman8701]

you are the type to use a hammer on screws and call yourself clever

[@bhavishdhankar1943]

DC has always zero frequency & u can use higher amp than rated amp in your devices . Only voltage should be exact as rated on appliance . So what unwise here .

[@kennmossman8701]

@@bhavishdhankar1943 I am talking about re-charging batteries.

[@franciscomadoli8003]

Pq

[@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.

[@hyrochinz]

Good information but littered with incorrect information. Charging lead acid batteries in this way is fine in emergency situations, but if you look at the info on the battery itself, they advise not to use a current higher than 2.1 amps. As this set up has no current limitations, a discharged battery will draw a lot of amps, which is detrimental to battery health. And in the case of lithium ion batteries, NEVER use this setup. There are easier ways to burn your house down. Always charge lithium with CC-CV charging protocol and never exceed the C ratings. All in all a good video fudged up by the lack of knowledge regarding what you are talking about.

[@abi54634]

Bro, can we make spot welding with computer power supply ?

[@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)

[@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.

[@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

[@stupidehumanite]

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

[@mrgoodman6620]

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

[@myownpath8022]

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

[@sudeepchakraborty5084]

Pls mention all the possible output voltage for smps

[@MrElectron]

All that ha e been provided in the description + 6.74v , 7.45v , 8.45v , 10.1v, 17.85v

[@fbi-federalblyatofinvestig3853]

@@MrElectron for your wires the purple one is the 5v sub connection and the grey one is the power good wire.

[@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 😌.

[@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.

[@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.

[@medar6651]

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

[@vinaysripada5919]

What is that diode used for 12v battery charge

[@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.

[@krishnagamerz3438]

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

[@shoaibafridi7208]

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

[@husenalhanen579]

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

[@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!

[@SuperFreeEnergy]

فكرتك جيدة ولكنك لو استخدمة بوردة شحن بطاريات الليثيوم بدل الموحد سوف يكون الشحن افضل ومتوافق أكثر كما يمكنك استخدام بوردة مديول الرفع كونفرتر 5 امبير تستطيع التحكم في الخرج وتدريح الفولت من 1.2فولت وحتي 40 فولت وهذا افضل

[@MrElectron]

English ?

[@momogunsabah]

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

[@bubblegum1792]

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

[@andrecoetzee1924]

06:54 - "So let's do the multimeter check for the exact output voltage and here 12.8 volt DC" [Multimeter reads 12.79v] 07:02 - "Now we have our red wire which is +5v and we have 5v exact" [Multimeter reads 5.095v] LOL You crack me up buddy!

[@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

[@Antony--DIY]

My friend just... THANK YOU!!!🙇‍♂️ I don't spend 100 euros for buying two 12v 5a power supply for my Imax chargers (1s-6s 80w).. I use them for recharge my 5s batteries!! I use 12v 1a power supply from wireless home phone... To charge (balance) a 5s4p battery make 10 hours...😨 with 0.7 amber...!! So I have 4 batteries 5s4p and 2 imax 80w.. Waiting for low voltage and I will charge them with 1.5a... I want to believe, I will charge them all in 10 hours...!! Thanks again for your idea!!!👏🏼👏🏼👌

[@drchan5893]

very usefull video sir thank you for posting.

[@Versatech17]

There's no overcharge protection for that?

[@shubham9878]

The fully charged voltage of a 12v battery is 13.4v. hence you should have at least 13.4v power supply to fully charge the battery. This 12v power supply cannot charge it fully.

[@starbravo672]

Thanks for your video. I learned a lot.

[@lolgamerslol5248]

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

[@chriskassarjian8248]

Is the node necessary and will any node work

[@bayanicruz8914]

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

[@uncontrollabledogs3791]

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

[@abdulrahman-wx8hq]

Good job 👌👍

[@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)

[@MasterT2]

@9:10 what diode being used?

[@bonifaceebom7971]

Thanks sir for this video, please if want to charge 12v:95Ah-100ah how many volt am going to use to charge it

[@MrElectron]

A little more than 12 v but best voltage is 14.4v and 9 amps. Less amps like 3 to 4 amps will also charge it but charging is gonna be slow.

[@bonifaceebom7971]

@@MrElectron thanks

[@bonifaceebom7971]

@@MrElectron that means that 15v can also go for it?

[@ionmarius6652]

@@bonifaceebom7971 yes

[@vishnuponamala]

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

[@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

[@gtamyths96]

Same

[@bhawanasingh6179]

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

[@PF-gi9vv]

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

[@samstephen717]

What motor you are using mr electron 🙄 that black motor you used

[@digitalcricketer]

Dose it is same for my model st_300blp

[@s.anzerali3645]

good work provided detail this will help a lot

[@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

[@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?

[@yoreh]

Batteries of all kinds should never be charged without a proper protection or management system. There's a high risk of explosion. Better use this psu unit as a benchtop power supply.

[@drnarendrav]

Why we can not charge 12 v directly by yellow+ and black- wire??

[@accounts1298]

Which diode you use for charge 12v battery

[@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.

[@mrigankasinha1454]

Very very nice 👍❤️🙏 Clear explanation thanks you

[@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.

[@scotthenderson4376]

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

[@SophiesEarthquake]

you have a new fan!!

[@josdedam]

Maybe 5 v standy on the grey?

[@Devil_inside-]

Gray wire is power good and purple wire is 5v standby.

[@vishaldevganLove]

I also have the same power supply

[@turbo-v9319]

should we use protection circuit for lithium ion batteries?

[@zanexx4409]

At 14:20 you connect the DMM to battery and it reads 11.93V and you say "its completely discharged", am I missing something because no one else has commented on this??? But in my world that battery is near full charge assuming its a 12V battery, full would be 12.5-12.8V. Maybe I am in bizarro inverse realm of the multiverse and just didn't realize it. I have a question and comment about my experience with combining pos & neg voltages from a PSU, but 1st I am curious about that statement.

[@gmraysinfo1938]

No use when u use -12v because -12v have only 0.5 ampere means 500 mili ampere if u use any voltage combination with -12v out put will be only 0.5 ampere means 500 mili ampere

[@marcoshernandez4067]

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

[@kamalbsulaiman4583]

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

[@antoniskonstantakis5474]

You can't.

[@Thats_Mii]

All ouyput volts are DC?

[@sddiymakeitworthit7512]

Amazing workpiece awesome 👏

[@babershaikh5399]

Very informative video. Shukeria.

[@RestorAsik]

How many Ampers out of these ??

[@bennyyeung2172]

You need a charging profile to charge with batteries of different chemistry

[@shiro214okane]

great video I've learned a lot!

[@przemekaftyka]

Jak widać w 11:25 min to nie wszystkie linie są 20A (tylko +5V) i aż dziwne, że się nie spalił jak podłączałeś silnik na 24V bo linia -12 V ma jedynie 0,5A... ;-p

[@fakapachuau7943]

What a great things you have done...

[@IsmaelLopes-nb9uu]

U are a genius, great job bro

[@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

[@suniltanwarid]

From where you get your glove

[@MrElectron]

Flipkart

[@bambambundy6]

You did not have to pull that little power supply board out to find out anything. Diagrams are available online or you can use a multimeter to find out. Either way you won’t be pushing enough power to make much difference!

[@mdmujju456]

Can we charge acidic big battery?

[@maliyoutuber2450]

Purple wire is for 5v standby grey is power good when the power is good it has around 5volts

[@Fajardo3]

Thanks very useful video😮❤ could you please make a video about 12vdc to 220ac thanks in advance, God bless😌

[@MrElectron]

Thanks 😊. I have already made videos on that. Search on KZbin " Inverter by Mr. Electron "

[@josephsom1571]

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

[@MrFrancishor]

Good and clear explanation, I am appreciated.

[@n.r.patnuri8033]

Hi how are you

[@AliasgarLimbona]

What diode you use?

[@syedtv4386]

what value diod need us for 12v charging

[@hiksiol6306]

Hello. What are the parameters of the diode?

[@amkp40technology]

-12V wire provides lees current, if use it with maximum current and longer duration definitely you destroy your power supply 👍🏻🙄

[@ElectronXYZ]

Bro but the smps have over current protection then how will it get destroyes.

[@amkp40technology]

@@ElectronXYZ Already my power supply failed 👍🏻 some time worked over current protection specially for this section and than fused.

[@eezmo2114]

What is the description of that diode you using please.

[@onyilikeernest1044]

Thanks Sir. This ur video is transformative.