Modifying smps to a Variable power supply (4.5 to 14V)

Out put voltage of this industrial smps (switch mood power supply) at first is between 9.6V to 14V. I modified it to achieve a low voltage as 4.5V. So now it can give a 5v output as well as 12v output. So you get a 4.5 to 14V smps.
Increasing output voltage is not possible (at least by changing that potentiometer) as the maximum output voltage is coming when the potentiometer is at zero resistance.
Thank you.

[@mandakinisvlogs6427]

Can you increase its out put voltage???

[@tarunhazra8481]

I don't think it is possible. Out put capacitor maximum rating is 16v.

[@fuzzybobbles]

Diode Gone Wild did a video recently where he increased the voltage to double. You change the capacitors on the secondary side to higher voltage ones. Then change the resistor in the feedback circuit.

[@shadiabuaalim8190]

Can get 15v ????

[@tarunhazra8481]

I will try that in future.

[@sarkarj5633]

@@shadiabuaalim8190 add higher voltage capacitor in output side and chamge Tl431 feedback pin 📍 voltage devider resistance. One resistance connected between positive supply and pin one of Tl431 and another with pin one to ground via 1k preset.for Increasing voltage remove preset and short it with ground and remove resistance positive to pin one and add higher value preset.

[@jozsiolah1435]

Some devices have a luxury mode, and can be set up by connecting to variable power suppy. For example, power banks need 5.6 or 5.8 V to reach better charging capacity, shorter charging time. That is supported by car chargers, some need 24 V input , you have to buy a truck for this purpose. After done, your device will still be better and stronger with standard chargers. Phones are not that simple, they send in a code during charging, to switch to better output. The code uploads during 1 charging, for some power banks, it may take 7 hours. If you unplug the phone, the upload starts again, and have to wait another 7 hours before the ultra fast charging becomes supported. Some power banks have the software preinstalled, it becomes deleted first, then the phone's new software will be installed. The charging impulses load in the install, tht's why it's so long.

[@snakezdewiggle6084]

You need to place a load (car head light, etc.) On the out put to see how much current can be used before the voltage will drop at the new setting. ;)

[@payam5561]

Thank you very much for the nice video you made, I did the same thing and it worked👍

[@miguelbarrero777]

What you are mading is a monstruosity. What you have there is a voltage divider made up of a potentiometer and a resistor, you just have to replace the 1k pot for a 100k pot.

[@nedstar7378]

Good video and thanks for sharing

[@tarunhazra8481]

Thanks for watching!

[@andresburga2149]

Very nice

[@ashok7842]

very good knowledge for us

[@Prakashword]

Good luck bro

[@tarunhazra8481]

Thanks for your support.

[@mubasharnawaz1845]

Vari naice

[@nedeljkooctenjak9690]

Oooo ... , What an amater

[@scotthenderson4376]

I have a 24v 16 amp 400 watt power supply can I do this to make it go to 3.5v up say 29v what resistance pot would I need?

[@redvalley9807]

Can I do this with 24V smps? (1.25 - 24)v by changing the potentiometer?

[@miguelbarrero777]

If the transformer is 24v you can do, replace the electrolitic caps for another same capacity but 35v and the 1k pot for another 100k, thats all. If the caps are 35v then just replace 1k pot for 100k pot.

[@cocoy440]

I have power tools 18v How to adjust to 18v my friend

[@tarunhazra8481]

you have a power adapter which gives 18v right? Try to find feedback pin. Usually a voltage divider is used to set SMPS's output voltage. Replace that voltage divider with a potentiometer.

[@sarkarj5633]

@Shadi Abuaalim add higher voltage capacitor in output side and chamge Tl431 feedback pin 📍 voltage devider resistance. One resistance connected between positive supply and pin one of Tl431 and another with pin one to ground via 1k preset.for Increasing voltage remove preset and short it with ground and remove resistance positive to pin one and add higher value preset.

[@ajitgeorge2893]

Without a regulator that power suppy is useless for many applications

[@djskinnimusic2317]

so out of the box u can get up to 14.7v?

[@shreegold]

Sir News your help in a project how to get in touch?

[@sangitasoni1117]

Sir I have upgraded my smps by using a bigger transformer and more secondary turns and it's giving output 32v but after connecting load its not stable.even after decreasing the volts to 20 its still unstable .what should I do

[@tarunhazra8481]

Email me with pictures [e-mail]

[@MACYNET323]

Can I use and wich value knob potentiometer instead of these trims? My supply is Mean Well LRS 150-12

[@tarunhazra8481]

Yes. They all do the same job.

[@MACYNET323]

@@tarunhazra8481Thanks Sir, 10k type or other? www.aliexpress.com/item/-/1005001551496577.html

[@h.s3081]

No current in 5 volt

[@kdcreativity6201]

sir ive upgraded my 12v 5amp smps by changing its 2.2k feedback resistor to 1k and replacing 16v cap with 35v but after increasing the voltage above 18v the voltage is not stable .i want to make it 36v.should i need to increase the secondry winding?

[@tarunhazra8481]

I don't say you can't. but first check which topology is used. depending on the topology you have to sure about few things. and also transformer can store a specific amount of energy. your out voltage is not stable may be because your transformer is going towards saturation and controller ic will not allowed it to happen. if you want to change transformer windings first check what are the limitations based on topology.

[@SetimoLima]

Aumenta o capacitor acima de 36, coloca 50v

[@tarunhazra2056]

😥🤔🤔🤔