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

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4 жыл бұрын

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.

Пікірлер: 40

@mandakinisvlogs6427 4 жыл бұрын

Can you increase its out put voltage???

@tarunhazra8481 4 жыл бұрын

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

@fuzzybobbles 3 жыл бұрын

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 3 жыл бұрын

Can get 15v ????

@tarunhazra8481 3 жыл бұрын

I will try that in future.

@sarkarj5633 2 жыл бұрын

@@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.

@snakezdewiggle6084 Жыл бұрын

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. ;)

@jozsiolah1435 2 күн бұрын

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.

@payam5561 9 ай бұрын

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

@nedstar7378 3 жыл бұрын

Good video and thanks for sharing

@tarunhazra8481 3 жыл бұрын

Thanks for watching!

@ashok7842 3 жыл бұрын

very good knowledge for us

@miguelbarrero777 9 ай бұрын

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.

@scotthenderson4376 Жыл бұрын

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?

@djskinnimusic2317 Жыл бұрын

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

@andresburga2149 Жыл бұрын

Very nice

@sangitasoni1117 3 жыл бұрын

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 3 жыл бұрын

Email me with pictures ojyx09@gmail.com

@Prakashword 3 жыл бұрын

Good luck bro

@tarunhazra8481 3 жыл бұрын

Thanks for your support.

@redvalley9807 3 жыл бұрын

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

@miguelbarrero777 9 ай бұрын

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.

@MACYNET323 3 жыл бұрын

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

@tarunhazra8481 3 жыл бұрын

Yes. They all do the same job.

@MACYNET323 3 жыл бұрын

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

@shreegold 8 ай бұрын

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

@kdcreativity6201 3 жыл бұрын

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 3 жыл бұрын

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 Жыл бұрын

Aumenta o capacitor acima de 36, coloca 50v

@cocoy440 3 жыл бұрын

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

@tarunhazra8481 3 жыл бұрын

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 2 жыл бұрын

@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.