How to make adjustable power supply using ANY computer power supply unit

[@Basement-Science]

This is quite ingenious, adding your own bridge rectifier while leaving the old one to regulate the voltage. You could even still use the original 12V output at the same time.

[@sleepwalkerbg1]

Hi Kasyan. Excellent an creative idea but here are some suggestions. Adding capacitor after FULL BRIDGE RECTIFIER ( ;) ) is not good idea in hard switch topology because of inrush current. You are endangering primary switches (transistors) and you also lowering life expectancy of that capacitor in rectifier. You should add a storage inductor that acts as a passive buck regulator and attenuates output electrolytic capacitor's inrush current. Best regards.

[@arrevunella]

This is very interesting but there is one thing I did not understand, what is the difference between taking the 24V like in this video or using the blue wire as negative?

[@MCsCreations]

Amazing work, dude... That's really useful!!!

[@filenotfound__3871]

I have a problem: I did the thing to get 24V DC, I used FR203 diodes in a bridge...and got 55V. How? And how do I step it to about 40-45V witch is the maximum my buck converter will work with?

[@aravindwilson1558]

Did you got any solution???

[@filenotfound__3871]

@@aravindwilson1558 I got a buck - boost converter lol. Altho i think the issue might be qith the group regulation choke on the output.

[@aravindwilson1558]

@@filenotfound__3871 thanks for replying ❤️ Also I tried adding choke from a nother atx psu still didn't worked - getting 40-55 v

[@suryapatnaik5720]

If we don't need 12v or 5v can we remove those factory diodes and toroidals and capacitors in secondary side?

[@Brokendiode]

No, these power supply's operat in a deferent way than you might think, not all of the voltages are well regulated, these are switching power supply's that regulate the 5 volt supply by providing a sample to the PWM regulator that drives the high voltage mosfets that drives the main step down transformer. This means that the 5 volts is highly regulated and the rest will very a little with there own load but may increase slightly as the 5 volts is loaded down. Without the 5 volts the output will just run wide open, and very with line voltage, and with load on any remaining outputs, that's why some of these power supply's have to have a load, or load resistor, applied to the 5 volt supply to work properly, otherwise the filter capacitor, will with no load satisfie the feedback loop and let the regulator cut back to an idle, causing the other loaded outputs to sag or drop out altogether.

[@filenotfound__3871]

I did it...and killed my PSU...

[@ginzburgi.9251]

Good job, very comprehensible.

[@theconquerorstv506]

how do you connect if you have power supply module. do you have to make diode rectifier or can be connected directly to power supply module

[@electronic7979]

Excellent project

[@tanyalobyam]

What program you use for making panel?

[@shehryarshaheen7115]

greate work dude. this is the real solution

[@rawandjaza5929]

So can not use bridge rectifier diode like kbu808 it’s 8A?

[@rahulwaghmare6370]

I like n love ur all video n voice that u nicely discribe

[@hemantmundhe6662]

Nice video,specially sort circuits demonstration.

[@suryapatnaik5720]

Not getting output from additional bridge diodes on the transformer. My smps has 2005z chip. Please help, or give tips.

[@TelredesCursos]

Muito bom! Parabéns

[@robertanderson8613]

Great show exactly what I've been looking for except I want to use a server psu or two for 24v and more current will this circuit work in that situation? Or upgrading parts to higher values? Thank you

[@ltronics62]

this is excellent. thank you for providing this info!

[@tolgadabbagh1877]

i tried to bypass the inductor at a high power smps . the mosfets get very hot very quickly . so something is missing in this design .

[@tolgadabbagh1877]

also when you connect positive and negative 12v together they will already have the bridge rectifier if you connect them after their factory diodes before the inductors you will still get 24v .

[@ashbe77]

Great job,thank you so much.

[@MedSou]

Thank you 👍👍👍👍

[@Themachine615]

I have 165VDc 15a power supply. How can I safely step down and make adjustable? Thank you

[@SimpleEnough2k9]

Please share a picture of that beast !! There should be quite a few secondary taps on the transformer so you should be able to find an appropriate voltage to suit your needs. I'm really surprised to see that much voltage and current for a power supply but I guess there's always a first time for everything.

[@jatinmali9310]

Just use step down converter

[@king24km]

why mine has 40-50volt output on sscondary trans when i add the diode and the capacitor(35v2300 ùf)?

[@aravindwilson1558]

Did you got any solution

[@moshiurrahmanmeraj6640]

Please make a video on variable dual power supply with output short circuit protection , it's more necessary then single power supply . thanks. Love from Bangladesh 🇧🇩📶📻 👍.

[@hennochoi]

As long as the ground and the negative lead of the power supply aren't connected the output is floating which means you can connect 2 power supplies to have a variable power supply with negative and positive voltage the only issue is if you want to keep the 2 voltages the same without manually adjust them but that can be fixed pretty easily (check tracking double power supply)

[@rofeiga789]

Thanks man ❤😘 btw in video i saw ic SD6109 but in circuits daigram it is TL494,i got sd6109 model tell me how to modify it

[@rohandabir1588]

Very nice make a video on inverter sine wave

[@jeetendarkumar4514]

Please make a video of how to make a mini toridol transformer

[@MrRonychakraborty]

nice as always

[@willylimas998]

i have try and put diode bridge to that 2 pin of 12v and then psu wont start, anybody can tell me why ?

[@mohamadaldarwish6678]

I love your voice😍😍

[@jimw7916]

Why do you call a regulator a "stabilizer"? and Why do you call a heatsink a "radiator"?

[@ThaDIY]

Thank you

[@passtranelectronics]

excelente

[@ParthBhat]

Amazing!, But I have a question, if the core amps is limited to 3amp then how at the output of the 5v/12v/3.3v we have amperes upto 20 or 23amps? Just confused about this part. And thanks a lot for sharing the video Cheers!

[@bm830810]

that puny heat sink cant handle 70W continuously for sure, maybe add a switcher preregulator

[@pradipselectrolab2994]

What? If somebody do not have the ATX Power Supply you are using.

[@tolgadabbagh1877]

watch it again , then , again .

[@TheJavaSync]

Is It 3A max? Is It posible more A?

[@nick5625]

TheJavaSync buy a buck boost converter from eBay for 40€ for up to 50v and 30a or buy a cheaper one for less v and a

[@diecksl]

@@nick5625 At that price, plus the ATX power supply (if bought new) this gets close to the price range of a (cheap) chinese regulated power supply (30 V/5A).

[@nick5625]

Lejf Diecks 1 to be waiting this video you probably have an atx power supply , 2 you don't need a power supply a 12v transformer with a full bridge rectifier and some capacitors will do, 3 you get 50v 30a which is much better.

[@nick5625]

Lejf Diecks don't forget your 1500 watt fuse 😜

[@Pantera13g]

For 5A, change aditional circuit in this video with +Kasyan TV Adjustable power supply 0-35V 0-5A, check kzbin.info/www/bejne/laOWkHqgo9x8aKM

[@vishva8kumara]

You can't really control the current. The current can only be measured and limited. The element/load decides the current it will conduct at its given state.

[@tolgadabbagh1877]

they call that limitation " control "

[@kahitanongmaisip9358]

sir kasyan tv im super fun of you please can you make a UHF VHF amplifier like antenna booster RCA please please i always watching youre vids and i make it please :)

[@ksrawanlab5986]

Awesome

[@amanhameed7114]

I do this practical but result is not good. A large amount of ripple produced. Not every supply have same design. I do different practicals to convert ATX power supply into bench power supply but a lot of ripple produced and other design fault. I not recommended that modification in ATX.

[@Deep_Thoughts99]

How you maintained the short circuit protection?

[@Basement-Science]

if short protection is on the primary side, it will work. I assume that´s where it is normally done? Otherwise you would have to monitor every output rail separately. Edit: Actually, it shouldn´t matter where the short circuit monitoring is, since the transformer cannot generate any voltage anymore if one of the rails is shorted somehow.

[@Qaiserhayatkhan]

good video

[@tylersheehy3918]

In computer tecknolgeys we have a standard rule don't open power supply even if it's been off for a while

[@misium]

you have to wait two whiles

[@aakashtiwari3677]

Can you please make a video on 3 Phase MOSFET based Diode Clamped Multilevel Inverter? Because I have taken this topic as my Engineering Final year Project.

[@e.h.lipton73]

Sweet lady comprehensive standard modifications for atx do not exist, true. But YOUR KNOWLEDGE to reverse engineer does. SO SHOW US HOW YOU WOULD DO IT,,,! Then,,, WE LEARN! Never mind, I jumped to conclusions again,, did it because of opening statement. You in fact are truly trying to teach us how. My apologies dear lady.

[@ErkanOkman]

👍👏

[@rameshchandrasahu2195]

please say in Hindi language because your ponaunsment is very good but some people are unable to understand.2nd things components value is not showing properly.

[@SimpleEnough2k9]

That would pretty much explain why some people, like me, have so much difficulty to understand hindi speaking people when they put their english "ponaunsment" skills to practice ! Seriously, english is an international language, much more than Hindi, so if someone wants to reach a large pool of people with their video clip, doing it in english will most likely be the way to go. Which component values did you miss ? Beside the HER505 diodes, the 2200uF 50V capacitor, the 10K and 100K potentiometers, there isn't much shown here. Don't forget to look in the description too as there are quite a few links that might be of interest too.

[@Sergey_Bobrov]

Hi is Russian

[@tolgadabbagh1877]

learn english .

[@e.h.lipton73]

Sweet lady comprehensive standard modifications for atx do not exist, true. But YOUR KNOWLEDGE to reverse engineer does. SO SHOW US HOW YOU WOULD DO IT,,,! Then,,, WE LEARN!

[@horacewonghy]

12-（-12）=24？

[@FlyingShotsman]

Try typing it into a calculator. [. . . . .] Mind blown, eh?

[@Basement-Science]

yes you can get 24v that way, but the -12v is only for low power, and therefore 24v is too. Not sure if all ATX PSU are happy with a load between these though.

[@reeseyme9613]

voltage are relative to one another thats why. like stacking 2 AAs battery in series and take center as ground you get + and - 1.5V at each end then a total of 3V in series.

[@irfanjalal2010]

I need 0-35 v Amp Circuit board from Jlcpcb ! will u help me for it m from pakistan !

[@robsonszpanic6485]

I made that and got FUKKEN 60V, HOW? I HAVE NO IDEA.

[@robsonszpanic6485]

I NEED HELP PLEASE I'M GETTING CRAZY HOW 12 + 12 IS GIVING ME 60VDC?

[@KasyanTV]

This is the amplitude value on the capacitor. Connect a small load, then measure the voltage

[@robsonszpanic6485]

Now I understand.. But how you did it with only a 50v capacitor? Why it didn't blow up?

[@robsonszpanic6485]

And feeding the Tl494 with 60v isnt a problem?

[@aravindwilson1558]

​@@robsonszpanic6485how did you solve this problem tell me in detail pls

[@ядерныйпузырь]

касьян и нашим и вашим

[@kahitanongmaisip9358]

sir kasyan tv im super fun of you please can you make a UHF VHF amplifier like antenna booster RCA please please i always watching youre vids and i make it please :)