I am building a bench power supply. So today I bought two 24V / 10A power supplies. A 36V or 48V power supply is twice as expensive as a 24V power supply . So I bought the 24 power supply and modified it to 36V. The modification is very simple, you just need to replace feedback resistor (in my power supply. it is 2K, I replace it to 1K). Next you need to replace the 35V filter capacitors to 50V or 63V. For a 12V power supply, do the same.

It should be pointed out that you will be dropping your current capability by at least half doing this. So you will need a power supply that will be at least double what you need in your final application. If you bought a 12V 10A supply, it is capable of 120 watts. If you modify it to 24V, it would be 5A max because the power supply is still only capable of 120 watts.

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Спасибо за очень полезную информацию. Я тоже попробовал переделать такой же блок питания. Я не выпаивал резистор, который вы выпаяли. Я просто параллельно ему припаял резистор 10К и получил 31V на выходе. Также я не трогал заводские конденсаторы, потому что они на 35V. Теперь регулировка напряжения потенциометром на выходе от 26V до 31V. Получилось быстро и просто. Спасибо!

nice work buddy be careful when working without earth wire i too had a box full of capacitor collection and make sure u check them b4 soldering with esr meter or something

Thank you for sharing this video

ustam sağol varol çok güzel bir çalışma teşekkürler

Apart from the fan which was not designed for 36v, you should check the dissipation rating of the two resistors in the potential divider you changed - lowering the resistor value will increase the current flowing and the top resistor will also see the increased output voltage.

Your work is great, thanks for sharing! :)

well you certainly have a neck on how to modify electronics.... well done!! and THANK YOU!!!

How far does the voltage drop under load though?

Awesome awesome awesome video Love it Thank you for sharing this ❤️❤️

If one wanted to avoid having to desolder the 1k resister you could also just solder a 2.2k resistor right on top of the one already in there for parallel resistance of 1047 ohms too.

Menyimak informasi menarik, terimakasih telah berbagi ilmu.

Very good comments on screen. Thanks

Thanks sir. God bless u. ..

very good, thanks guy!

I need 7v power supply. how to modify 12v to 9v? to decrease voltage, don't you need to replace the capacitor? and what resistor should I use?

You removed the old capacitors and soldered 03 capacitors but I realized that 01 was 63 / 1000uf and the other two smaller ones, what is the voltage and uf?

It would be better to use another pulse transformer as well. The change the output voltage by a factor or 1.5 or 2 can drive your controller chip into its pwm limits. So you usually will not get the same output power as for the voltage it is designed for. If you reduce the output voltage you will also not get the same output power, because you need higher switching currents. So the losses of the pulse transformer will increase and you possibly overdrive your rectifier current.

what value resistor would you need to make it work 48v

Genial!!, me ayudo mucho este vídeo para aumentar voltaje a mi fuente de alimentación. Gracias 🙏

Hi i finally came around to upgrade the Volts output of my 12V power supply,opened it went to check if pretty much anything was looking good to the point of switching the resistors near capacitors with the following ohm 600 from my right next 1.2 kohm and the last its 2."something" kohm, based on the video i should change the one in the middle,which in my case is the 1.2 kohm, with 1kohm right? or should i change the first which is 600 ohm?or should i change the third which is 2 kohm? If the answer is change the one in the middle would it change anything if i put 1-kohm but slighltly bigger size? Keep in mind that my ignorance in electronics its very high!!!!, One more thing the capacitors 12V i switched were 3300 uF i've put 1000uF 50V,change anything if the Frads are lower? Please if you kindly could answer i would really appreciate it.

BEAUTIFULL WORK.....a solder sucker...good for you.....oldtech

And how limiting Ampers power please?

Well done bro

Good job brother..

Any idea if we change transformer to make it ct for audio?

Cool video, thanks :)

What capacity capacitors you removed and what are new capacitor values?

I saw you that you can adjust it down to 20 volt can you confirm because i need to modify this to power my jigsaw

it's nice keep up

Nice project

waiting for the next project ❤

Whats the use of the 5w21kj choke you connected permanently on the PSU? Is it safe to remove the output when the input is still connected?

My SMPS transistor has some plastic cover attached with thermal paste on it. Should I remove the plastic or should I keep it I am trying to change thermal paste on it so need advice to keep that plastic or just apply on the transistor and touch it to the metel body without plastic

Too much easy, my friend!😉

AWESOME

genijalno, super {serbia}

Mantap, lanjutkan...

dude great video, we want a video increasing Amper of SMPS from 10 to 20 or 30 A . make it soon, respect from Turkey

Thank you very much What did you do with the 24V fan at the end? Did you replace it with a 36V fan? Also, with this change, how much the 10A rated current of the device will decrease

Good idea. Thank you boss. I am success.

Great video, very informative. I have a similar power supply that with the potentiometer goes from 36v - 24v @ 10 amps. Just for a fun project I'd like to modify it to work !3.8v and raise the amperage. Using it for an amateur radio transceiver in mind. Could that be done. Seems like it's sort of the same thing as you did so excelently but in reverse. Thanks for the video.

Хорошая переделка. Спосибо.

Do you think 8A diode bridge require heatsink?thx 4 video

Nice information by using caption thanks ❤❤

Üstada çok iyisin

So you set variable resistor to maximum before soldering and after it's back to minimum without you even touching it. Pure magic.

can it be used for switching 12v 20A, bro?

Happy video thank you

Excellent

GOOOOOOOD THANKS

Homemade 102 , hello. Can I install any resistor between the red wire of FAN and connector that decrease the voltage to ~24V? Or can’t you do that? Thanks.

Very Good...!!!

I did this to a 12v PSU. I let thing I didn't change is change from the 2k to the 1k resistor , is that why it still shows 12v?

Can you do a 12v server power supply to a 24v power supply? I have some HP and Dell ones I want to make use of, so I would like to see how you would do it. Maybe you can solder on some connectors on the pcb of the power supply too so it can be used as a desktop pwr or some other applications.

How to get higher current 10a to 15a or 20a any modification? By changing the diode output and shunt?

Can you make it on HP server supply? and keep the power factor at 94% ? You decrease PF if doing this to get the higher voltage?

Good idea. But Does it still give same amperes?

nice work

the question..it is safe for high load? on 6 or 7amp for 10amp smps...i know if make more vol the amp will be decrease

Полезная информация! Спасибо!

very good sir, please upload next interesting part......................

thanks dude petty useful

I would like to thank you for the video , and i want some help if you can lead me to where to dig , if i want the output voltage to raise slowly exemple of a 1 volt step , eg 10/11/12/13//14/15 slowly .Thanks .

Excellent video! Thank you for creating it. Would you happen to know how to vary the current from 0 to 10 amps on one of these power supplies?

It does work but voltage starts to drop when a load is connected, so it's useless in my case (12V 15A SMPS)

What about bias voltage at primary side?

Bravo boss

if I don't change the feedback resistor, what will happen?

What will be the effect on rated amp? Increasing the voltage have to reduce amp to keep the total rated watt same otherwise overheating may cause the rectifier and other components to go bad. How this problem will be taken care of?

is ot safe to connect the output to get higher current

You should also change the output diode as the peak voltage will grow about proportionally to the output voltage! You need 100V diode for 12V, 200V diode for 24V, 300V for 36V, and 400V for 48V, otherwise it will soon fail! The fan needs a buck/boost converter to continue getting 24V no matter the voltage! You can also power it from another power supply (a much smaller one that you isolate and fit into the high power one)

bro i upgraded my 12v 5amp smps and its working perfectly but the amps remains same .i mean does it still give 5 amps after upgrading ?

good day Sir! how about the 5 volts, what should i change to make 12 volts, plz advice🙏🙏

Thanks, will try it, i have many 12v psu, will try to make it 24v to charge my 24v battery pack

Thank you........ Thank you very much

Nice

Do you know how to get more voltage of the sp-240-5

Hi Input 220 Out +24/15A I want to lower the voltage to 14v, but I don't have resistors where you have them. There is one jumper What should I do, please tell me.

Hi, is the 12 to 36V process the same as this one shown in the 24 to 36V video? Thanks.

I bought 36v 5A from online shop. This model using blue pcb. All resistor using smd component. Can you make video that i would to upgrade to 60v please. I want to know what componant shoud i change. Sorry for my bad english

Hello, Great video, I'm trying to modify my power supply to charge some 8S lithium ion batteries i have at 32.6v . If I wanted to make it 32.6v instead of 36v would I just have to add a different resistor? How would i go about calculating that resistance?

I think great job

It looked like the unit stopped working when you turned up the voltage to 37v. Was that the over voltage protection coming in? 🤔

Is the current capability will degrese I have same power supply that you have

Can I modify other powers supply changing the same components? For example, a 12 volts - 5 ampers or a 12 volts - 10 amps?.... Or I need to know the diagram of the power supply to know what's components to changes ?.... Thanks for your help.

How to identify the resistor to change?

Estimado. Genio. Te consulto. Tengo una fuente de 12v. X 5amp. Y solo da el 5% hacia arriba o abajo. Y necesito llevarlo hasta unos 20v. Que capacitor me recomendas. Y que resistencia. O sea los valores para llegar a eso o aproximado. Gracias por tus videos. Sos un genio. Gracias por tu tiempo

I have similar SMPS unit S-200-24, after connecting to 220VAC it ran for some time, then something inside exploded, I think possibly the high voltage capacitors (however they look normal to me) Could you give me an idea what might be wrong and how I can repair it? I quite sure it must be replaceable

Looks simple to do, maybe can make adjustable by replacing the 2K with a pot? 😜 Is all SMPS same ? Thanks for sharing 💕

good

I have 12v 30 ampa psu, I want to have 24v and about 15 amps because the tools will absorb a maximum of 10 amps, so i just replace the resistor with half value and replace filter capacitors with double rated values. Anything else?

The main filter capacitors are connected in sieres for higher voltage rating (310V DC on 220AC input). There is no negative voltage here.

The fan is 12v too?

woow, great project!! i like it

what about the current? stay in 10A or get lower?

Hello . Can i increase current ? If i have smps with 2 output 24v/2A .. 5v/4A. How can i modify for 24v/6A . Thx

Good day amd nice video. is the capacitance of the capacitor not relevant? thanks