How to make adjustable 1 to 20 voltage power supply from old PSU.DIY Bench power supply.
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- เผยแพร่เมื่อ 25 ส.ค. 2024
- Hi Guys here is the new video from my channel "How to make adjustable 1 to 20 voltage power supply from old PSU.DIY Bench power supply." from "Electrical and electronics projects" "E&EP" Channel.
This is a PSU from old computer and want it to convert to 1 - 20 Volts Adjustable power supply almost works same as bench power supply.
We need different range of voltages to power any electronics like DC motors,circuits etc.So, i have made this adjustable power supply by showing a Circuit diagram to you guys and with the help of my video.It is very easy to make your own even, a begginer can also make this one by following video and circuit diagram.
ABOUT WIRING:
Here in this PSU to make it 1- 20v adjustable power supply i have cut all unecessary wires excep four wires : Blue,Yellow,Green and Grey.
Blue wire is -12v used for cathode and Yellow wire is +12v used for Anode and the remaining two are for turn the PSU on by connecting them together and for Digital DC volt meter there are three wires connected with RED,BLACK and WHITE Red&Black wires are to power the Meter connect Black to Blue -12v and Red to +12v and connect the White wire to output voltage side of circuit which is adjustable for more better understanding the circuit diagram is in the video.
MATERIAL'S LIST:
220 ohm Resister 1/4W (1)
100uF 35v Capacitors (2)
0.1 uF 50v Capacitors (2)
VR Potentiometer 10k (1)
U1 LM317 Regulator
Binding Pots (2)
Digital DC volt meter 0-99v
Volume knob
AC Switch on/off button.
SUBSCRIBE HERE:
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||***THANKS FOR WATCHING***||
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I would rather get one of those 150~ Watt Boosters, boost 12vdc voltage up (most power supplies can push 10+A easy)...smooth it with caps, then use buck to regulate back down (smooth output as well to remove ripple)...hooking the -12vdc rail to the +12vdc rail limits the current available as most -12vdc rails on ATX power supplies are very very limited in current capacity. [read the power tag on side of power supply]
good upgrade . the last one was good too-
it's a matter of
having more options
Thanks.
i think
switch is better for charging battery's
because you do not need a multimeter
everytime to tune it up
Tanks for your tutorial... Is very good.
I like your pet in every video!
Bahoth alaa video upload ki hae bhae. Thanks for upload. Kamal ka project diaya hae. ap ki video hamisha achi hothi hae aur mae barhay shoq say dekhtha hon. Great work. Keep the nice work up yar.
bakvash video yaar ye to bataya Nahi kya component tum laga rahe ho Na koi diagram show kiya
Two thumbs up for at least talking in beginning amd listing parts... For some reason people just show what they are doing and not explaining... But music is not necessary....👍👍
very good work man you are the best
Excellent Dear brother
Well done thanks
very nice project!
muito bom....parabéns....
the best one I have seen yet!
Thank so much Crip Skillz!
longer video but well explained is not a problem !!!!
Though good intentioned, this isn't really a solution to the problem: you're attaching a linear regulator and using the ATX PSU as a voltage source.
What would be a much better and neater solution, IMHO, is to hack the SMPS and create a continuously variable output voltage from the voltage divider on the LV side, linking to the optocoupler adjusting the PWM duty cycle.
This is what I'll be doing to fill the bordom of COVD-19 lockdown, and will surely publish the result.
Good effort regardless ..
The problem is that any hack into the ATX PSU always alters ALL the voltages (i.e. 3.3, 5, 12); imho the best solution is to have a mixed setup: all 3 fixed switched and protected output voltages and one linear regulated variable output for ocassional use in circuits
@@alerey4363 how would I make this scenario. I need the PSU to have an output of 20 volts on one circuit and 12 volts on another circuit. I know it's possible. Any help you have would be appreciated. I will not need any other voltage scenarios and the amperage is max 15a on both circuits
ممتاز انامبتدأ واريد من حضرتك مخطط واضح ومبسط انامتابع حضرتك ع قناتك
very good
Thanks
Is this better or using DC-DC converter better...??
Awesome VIDEO, We truly appreciate you. You are amazing bro
Thank you very much bro!
Add a 2955 transistor for by pass to the schematic and you will have a 15 A power supply
boss bike ki electric wiring py video bnaien
Good work babu.
Thank you.
great broo
This is a "DIY Cooling fan with an old ATX Power Supply"!
the only change I would make is not use the power switch on the mains connection. if you connect the green wire to the switch, and the black to the same switch, you control everything with low voltage and low current.
Love the fans.
This is awesome. Can I use this to charge a 12V car battery? Thanks
very nice. From which city you belong?
Very nice. Just a few problems... First, the heatsink for the LM317 is too small. Linear voltage regulators work just like a variable resistor. They convert the unused energy into heat. Second, because that PSU is a SMPS (switching mode power supply) you must put a small load on it (like a 5W 25 ohm resistor on the 5V output) so the output voltages will stabilise. And try isolating the binding posts with something because they are too close to other components in the PSU. But, finally, very nice project! ;)
Thanks!
Current could be increased using power transistor to 10 Amps.
The linear power supplies have a total crap efficiency, and nobody wants inefficiency. I advise you to use a buck boost converter.
yes that is why we use AC , the higher the frequency the lower the loses but sometimes losses are negligible , sometimes very important , doesn't matter , this video is bad , its a bad concept .
Amazing
Thank you so much for appreciate.
you're most welcome
He is smart ever!
What an excellent idea! Great work uploaded. I was looking to modify one for my need but my current need is much much more and I need something constant current control source for charging purpose. Soon I will modify one and will upload the video to my channel. Also please give a look to my project 555 function generator assembly and powering up videos on my channel. Hope you will like them. Also give a look to associated blog to those videos. The blog are covering even more important information about the project. You did awesome work! Keep the nice work up.
LearningZone
how would you make a power supply from a old scanner,copier,fax machine all in on the office type,there the 3' tall ones I'm talking about
just look inside them, you cannot miss the power supply part! :)
but those are really low power supplies, even they can offer 25-35 volts, they will offer a mere tens (or hundreds if you are lucky and those are really old) miliamps of current... so, they are not so useful :)
I created my own from scanner power supply
i connect LM317 Adjustable Voltage Regulator Step-down Power Supply Module with LED Meter to my atx power supply +12v yellow and - 12v blue wire..... i use my dc 775 motor to test run very slow..........
viewers serius complaimt about youtube >>> when i want to
listen to ELECRONICS YES YES >>> I DO NOT WANT NO MUSIC
NONE
what output current it is?
and could you make adjustable current?
Z 12 V z AT, alebo ATX zdroja s LM317 neurobíš na výstupe 20 V.
Mostra como instala o potenciômetro que vende no aliexpres
-12 volts is no more than 1 Ampere in most PSU so the project have 1A out!
sakisrorras what? most atx supplies can deliver like 30 amps on their 12v rails
If you can see i wrote -12 (minus 12) because in your schematic you are using +12 and -12 outputs from the ATX .So i think you can have more than 1A from your PSU.Correct me if i;m wrong!
sakisrorras ahh now I see what you've meant. I thought that - was there by accident. you're right: the output of -12 volts is about 1a
PrashMotion 0.8 a**
Even my atx at - 12v only supply 0.5ampere
Hi, how did you do to avoid over voltage protection ?
Nice video 😍😍😍 what about amps meter where shall i add it
Add it in series of positive output wire which is RED one.
what current efficiency in amps has this power supply
can i charge a 4.8v drill and a 9.6 drill with it ???
pozdrawiam :)
Hi, very good project, thumbs up!! I have questions. Is it possible to avoid using the -12v rail in order to get more amperage or is this a stupidity that i have just said? would it lower the maximum voltage? would this modify be safe? Thanks
It would lower the maximum voltage if you need around 12V you can avoid -12v in order to get more amperage.
but im little confused hehe cos these parts u r solder na so i dont know how i solder capacitors on curcuit board cos i dont know wt is + nd wt is - nd how i solder it ... should is solder it together?!
Voltage is not the right word. The right word is volt.
"1 to 20 volt"
1.25V
hello friend a serious favor possible that you published the diagram for the LM317, because he/she doesn't understand each other like you welded all the elements Thank you ahead of time
Reciclito Pc ́s
I found LM317 in a power supply from a Spirit LXZ master mix desk for audio.
I like your project, was wondering if a higher value potentiometer will fine tune the voltage to 0.1 volt increments?
no its an lm317 it will go down to 1.2 v
I think he meant in 0.1 steps (at any voltage) not down to 0.1v , cos it looked like it was hard to fine tune the Voltage with the 10K Pot. ( I think it was 10K?)
oh well then no just use 10 turn pots :D ther like 5x more expensive but its alwys worth cuz trust me your gonna need that 4.2 your gonna need that 13.7 so yeah its worth it or what you can do is put a smalle pot in series the way you have more precision
Thx, that is good information, I'll have to look into wiring pots in series
Great video, bro. :)
can you use it for charge battery car
how many amps do you get totally off this ?
it is safe or not
Circuit diagram pls
Can i use 1 uF 50v Capacitors instead 0.1 uF 50v Capacitors?
solder two of 0.22 capacitor in serial and you got 0.1uf
Its a waste that the PSU can supply so many amps on its default voltages but your LM317 limits all of it to only 1.5 amp max. If the lm317 is paired with a transformer and a rectifier, it'll probably be 1/4 the size of the entire PSU - much much smaller
Adam Gadut yeah, it's true. the power supply has many voltage values which can be directly used for most common applications. if a variable PSU is really needed, a cheap buck converter is better.
Tradução:
Oi pessoal aqui é o novo vídeo do meu canal "Como fazer fonte de alimentação ajustável 1 a 20 de tensão da fonte de alimentação velha PSU.DIY Bench". de "Projetos elétricos e eletrônicos" Canal "E & EP".
Este é um PSU do computador antigo e quer converter para 1 - 20 Volts Fonte de alimentação ajustável quase funciona mesmo como fonte de alimentação do banco.
Precisamos de uma gama diferente de tensões para alimentar qualquer eletrônica como motores DC, circuitos, etc.Então, eu fiz esta fonte de alimentação ajustável, mostrando um diagrama de circuito para vocês e com a ajuda do meu vídeo.É muito fácil fazer o seu próprio mesmo, um iniciante também pode fazer isso seguindo o diagrama de vídeo e de circuito.
SOBRE FIAÇÃO:
Aqui neste PSU para torná-lo 1- 20V fonte de alimentação ajustável eu cortei todos os fios desnecessários, exceto quatro fios: azul, amarelo, verde e cinza.
O fio azul é -12v usado para catodo e o fio amarelo é + 12v usado para ânodo e os dois restantes são para ligar a fonte de alimentação conectando-os juntos e para o voltímetro digital DC há três fios conectados com vermelho, preto e vermelho são para alimentar o medidor conectar preto para azul -12v e vermelho para + 12v e conectar o fio branco ao lado de tensão de saída do circuito que é ajustável para entender melhor o diagrama de circuito está no vídeo.
LISTA DE MATERIAL:
220 ohm Resistência 1 / 4W (1)
100uF 35v capacitores (2)
0,1 uF 50v capacitores (2)
Potenciômetro VR 10k (1)
Regulador U1 LM317
Potenciômetros De Ligação (2)
Voltímetro digital de CC 0-99v
Botão de volume
AC Botão liga / desliga
awesome work :D
Why didn't you include all 12 volt yellow wires? Maybe wire the extra 12 volt, 5 volt, 3.3 volt wires for high amp on separate banana plugs?
loading up too much on the psu will cause it to fail
especially when charging batteries
using less wires = psu live longer
Why not just put an adjustable lm2596 in there
I have a huge box of them, but you would never get the amperage
the less the better for me
i made a video about charging a battery with a psu
i charged it alredy 5 times
it still works very well
and eazy to make
no soldering
and no parts needed
What is current ?.....voltage we can see...so is it suitable to use as car battery charger?
No it's not.
So you have transformed a switching power supply to a linear power supply.the idea of having adjustable PS is good, but you have lost all the goodies that smps can give.
220AC. Non 12DCOUT
???
Hi Pro.video clip good,I have done the above circuit ......because IC very hot .
Can replace any other IC. Please help me.thanks Pro
Use heatsink.
i wonder when -12v is connected to the ground, is -12v grounded or the ground is pulled down to -12v? what is the voltage between +12v and ground then? or -12v is actually just a specific ground (0v) for +12v?
When we take -12 as a negative and +12 as positive terminal so it sum -12 + + 12 = 24 Volts. The blue wire -12 is used for this purpose.
I understand your confusion, it's a bit tricky to think about.
You can think of it this way: You've got a difference in potential of 24 volts. With some tricks you establish a point between them, and you simply use that as your ground. This leaves you with +12 and -12v on each side. Now if you were to disconnect that mid-point from the ground in your circuit and use the -12 instead, you've have 0 and 24. The ground is just a reference, voltage potential is relative.
Does that make any more sense?
yeah you are right but the volts that starts from 1.2v because of meter has some problem to powered from 1.2v maybe.
Karl Birkir Flosason Thanks, i think i understand now. i was confused st by the schematic shown at first which -12v is connected to ground. i thought that doesn't make sense since to my knowledge, 'ground' is always 0v (for the sake of safety and convenient). But it turns out in this schematic, ground is actually the negative terminal (-12v) instead of 0v (which exists among the bundle of wire )
I follow those step and the diagram but i only could get 12v max. How could i got up to 20v?
use the -12v wire with the 12V wires. though adding the -12V will massively lower your AMP output. roughly between 0.5amp to around 1amp max if you do that. the -12V and the 12V joined together make 24V but yeah you sacrifice output amps massively
The worst PC power supply is around 250W, half of this power is on the +12V line, which is roughly 10A. LM317 can supply max 1.5A, if cooled very efficiently and covering up the heatsink with electrical tape is not the way for best cooling. You're wasting your time with a linear voltage regulator.
Please help.
I have 200w psu and when i connect green and black wire fan just kicks for few seconds and it powers off. I didnt connect anything just all yellow black red and orange wires and i have some more but i didnt do anything with them. Please help
First make sure that black wires are not touching any of other wires maybe that's the reason, if not then there is a problem in a circuit of your PSU.Thanks.
Electrical & Electronics Projects. well they don't touch and psu wires or anything so problem is in psu
How are you getting 20volts when you are using 12 volt input?
@@Anonymos_xristianos he hasnt done in this way...-12 and +12=24 volt...
Would make one for sale
Can I connect transformer 230volt/15amp quickly reply to this device wont to perch me quickly buy
Its difficult to get elco 0,1 uf 50v here, can i use other elco?
Yes you can use nearest value.
Electrical & Electronics Projects. Ok, thanks
dung
The only thing that happens is that the potentiometer is grilled. The circuit fulfills no other purpose otherwise.
I use 12 v adapter its work or not
Yes it will also work.
music is very distracting!!!
What is the maximum amp output through that lm317?
1.5 amps
it can not deliver more than 1.5amps 😐, its a waste not to take advantage of the higher current rating of the psu if it were to be connected as a variable voltage unit.
How does it feel working with ants around all the time?
If you just using lm317 it just deliver small current. Very small. Its useless
You need some extra component to handle a huge current. You need put some transistor (ex: 2955/3055) to deliver lot of current.
You waste 20amps and just take an one amp? Who needs one amps?
Fata Benny get your facts straight, he is using the negative 12v rail in combination with +12v rail to get approximate 24 volts, but the -12v rail can supply about 0.5-1a max...
reglaj foarte prost, irosesti zeci de amperi pentru un lm317 de 1.5 A maximum? in conditii de racire buna ai 1.5A. cu radiatorul ala nu faci nimic. e nul, ca si cum n-ar fi.
No current limiting ???? Lame as . . . .
Taki masz syf na swoim miejscu pracy że mrówka lata ci po stole ?!?
how much Am out put?
1
schematic where?
Shown in video,I think you missed it.
at what time?
bro how much amperes it gives
1.5 amps, the maximum current LM317 could produce.
6 ads on the video...wow
Prasenth true that, and it's pretty useless after using the -12 which is about 0.5 amps together with the max current of the lm317
please can you send me diagram
Diagram is in the video.
10k pot? Why so much?
Use 5k.
how many amps ? can you charge a car battery with this charger ?
No!
ha ha
Urdu zaban me
ههههه جهقحكا قمعبم خبمع
اخل نفخؤ خامهب هههههه
نبكخع
buck con
yeah 20V , and 10W , not enough for a car lamp, only reason to use this switching power is for high power and you just lost that power , great stuff , keep it up , click bait your way to you tube best .
REALLY!!! Come on ... using 750W psu for max out put of 24W!! you could have use cheap 24V AC adapter before the regulation
naive🤷🏻♂️
grrrrr very poor. works. cos u ur vdo i waste money grrrrr. ur vdo really not clear nd not show wt is positive part of capacitors nd wt is negative grrrrr