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.
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.
@@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.
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.
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
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.
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.
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)
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.
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.
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
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.
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 .
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.
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
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
@@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
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 😌.
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.
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
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.
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.
@@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.
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.
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.
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.
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 .
I Have A Question,This Has Happened twice to me, You say green and black Right, ok I do that And My fan Turns for a little bit and Turns off then no more voltage outputs, What goes out? Can You please help me?
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
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?
Hi I did same like you did in charge - 12v with orange +5v but it doesn't works when I connect with battery power supply stopped automatically, so please help me out how to fix this problem for 15 v power
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!!!👏🏼👏🏼👌
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?
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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.
thank you sir! useful info
One of the few that properly explains his work, I'm the total ignorant on electronics, but these explanations make me understand everything better.
sadly this guy does not know what he is talking about
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.
GOOD
show us your project!
Show us yours
@@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.
M;
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.
Ive just made a multi volt charger with this video. No tenia ni idea quw se podia usar asi
Ka0 aap pp0LlLLLoLLLKIIIIO@@kikofras
grt✌
Yes, great video
The purple wire Is 5v too, It always outputs 5v even when the green wire isn't shorted to ground
I had no idea you could get so many voltages with different combinations of wires. Awesome!
you are funny...….
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
It's an intelligent usage of SMPS with its different combinations of power supply. GREAT
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.
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.
What is that diode used for 12v battery charge
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)
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.
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.
@9:10 what diode being used?
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
Same
There's no overcharge protection for that?
Pls mention all the possible output voltage for smps
All that ha e been provided in the description + 6.74v , 7.45v , 8.45v , 10.1v, 17.85v
@@MrElectron for your wires the purple one is the 5v sub connection and the grey one is the power good wire.
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.
You cannot desulfate the plates of a lead-acid battery with a regulated charge. “Smart charger” doesn’t mean better charger
you are the type to use a hammer on screws and call yourself clever
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 .
@@bhavishdhankar1943 I am talking about re-charging batteries.
Pq
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.
@ 24v it has very few amps. Im surprise it survived being connected to that big motor!
You are lucky that the very old capacitors didn't explodes :-)
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
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
@@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
@@thabed007 Lmao yes... Thanks again brother
Why we can not charge 12 v directly by yellow+ and black- wire??
which daoid are you use in 12v ups battery to controlling DC power?
Can u use that to increase in regulated 13.8volts thank sir..
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 😌.
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.
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
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
how did you run motors on 24 volts and most PSUs only allow 0.5 to 1 Ampere on -12 volt relay.
Is the node necessary and will any node work
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.
Which diode you use for charge 12v battery
How many Ampers out of these ??
Dose it is same for my model st_300blp
can you tell that diode number you charging UPS battery
What's the number of diode you're using fof charging 12v battery?
It would have better if you tell us about the Amps on each combination to better use it
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.
Can you use this to charge /test lithium batteries ? Would a buck converter and potentiometer do the trick?
What diode you use?
And the doit is used for what?
Can we charge acidic big battery?
Where can I get this kind of old cpu and the purple wire is standby 5volt from the 3amps diode
What motor you are using mr electron 🙄 that black motor you used
kounsa diode used karnhe.? value a lag a lag hota he
All ouyput volts are DC?
Wooow superb . I finally found a video about a great power supply . Hats off bruh ❤️❤️❤️❤️❤️
What is the description of that diode you using please.
whats the output power and current of 24v because my power supply gives 12v 14A and -12v 300mA
The problem you have there is over current when charging. You could easy cause a fire and buckle the plates in a battery.
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.
@@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.
Aoa.
Bhai is me sy ham (12 volt or 2 amp)
Kesy le sakty hai.
Can I charge the e-rickshaw 12v single battery by this method?
Thanks sir for this video, please if want to charge 12v:95Ah-100ah how many volt am going to use to charge it
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.
@@MrElectron thanks
@@MrElectron that means that 15v can also go for it?
@@bonifaceebom7971 yes
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.
Bro, can we make spot welding with computer power supply ?
Sir how to repair the SMPS ?
please explain me
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
should we use protection circuit for lithium ion batteries?
From where you get your glove
Flipkart
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?
hi could you please tell me the exact name credentials of the diode so i can buy the right ones thank you
The Atx power supply you have constructed is it capable of charging a 70 amps battery to 100 amps battery 12volts
Bro.why are you using diod.for charging 12 volt
what value diod need us for 12v charging
Hello. What are the parameters of the diode?
What size diode do I need for a 10 amp 200wats power supply
Plz help
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.
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.
Si ma tension de charge dépasse 14 volts ma batterie sera-t-elle endommagé ?
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 .
I Have A Question,This Has Happened twice to me, You say green and black Right, ok I do that And My fan Turns for a little bit and Turns off then no more voltage outputs, What goes out? Can You please help me?
I made an electrolysys power supply it works good for remove rust
🤔 Before cutting the connectors, try to learn of them. This will avoid the problem you encountered with the 2 unknown wires.
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
could i charge the li on batteries without the diode
Hello. What are the parameters of the diode?
How many minutes i have to put the battery i have 80 AMP battery 12V
Can I charge my 12V 88Ah acid battery ? How possible..?
Please answer me and solution this issues!
Bhai ye diode keya number ka hai what is the diode number plz tell me......bhai hum es se bike ke battery charger kar saktey hai ?
how will you controll amp.
How much amps that conection give? can i use with 55ah battery? reply please
What is that 20 A motor ?
Very good video thank you so much my friend for this information ♥️♥️♥️♥️♥️♥️🆗️👍👍
What is the diode code?
Maybe 5 v standy on the grey?
what is the best way of using this to charge a car battery?
Can you display the connections on the connectors
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?
when I am trying to 15V with diod the power supply is turn off I i dont know why ?
I did not quite catch the diode rating for the use in charging 12 volt batteries. What is the size?
i think i heard 6 amps
It's a 6AO5 Rectifier Diode, rated at 6A/50V
Hi I did same like you did in charge - 12v with orange +5v but it doesn't works when I connect with battery power supply stopped automatically, so please help me out how to fix this problem for 15 v power
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!!!👏🏼👏🏼👌
i want to charge my 150w battery what should i do?
Hi;
Thanx,
How to charge 6v battery by ATX power supply with auto cut off, please?
Dear sir can i run dc inverter ac compresar use this?
bagaimana anda mengatasi proteksinya?
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?
Bro how to disconnect battery charging
Is Automatically disconnect answer plz
Ye fan wala motor kaha laga hota hai bhai, mujhe bhi aisa hi motor chahiye.
My power supply don't have a Green wire 😭 what should I do
Purple wire is for 5v standby grey is power good when the power is good it has around 5volts