How To make a variable power supply using any adapter

[@MrSoundman1955]

The original power supply was 12 volts at 2 amps (but I think those are Chinese Amps!). This variable zener changes the voltage. So the current will decrease to 1 Amp at the 24 volt setting. Any setting above the original 12 volts will deliver less current. Nice useful little video though.

[@gabrielakakporo9783]

How do one control the current like the voltage is controlled ?

[@antoniodevincentiis3823]

since no turrns have been added to the secondary of transformer, much less than 1A will be output

[@ccv3237]

Of course, since the basic power unit has not change therefore its total output watts will not change either, meaning if the voltage increases its amps should decrease accordingly, and vise versa.@@antoniodevincentiis3823

[@pantak1198]

5:20 5:20 5:20 5:20

[@joynazarini5128]

You clever. Music in the subject and not loud. Thank you. Subscription. I'm from Ukraine.

[@Inventor_AW]

thank you

[@dominiksalata4234]

Considering the cost of normal power supplies, its a big deal!👍👍👍

[@fo4mm209]

great potential project, but this mod will not drive this bulb for a long time without overheating and eventually damaging components ? i would be interesting to add power transistors to hold more power.

[@ayadshaker637]

احسنت بارك الله بيك احسنت النشر عمل متقن وحترافي بالتوفيق

[@Inventor_AW]

اشكرك

[@waltp3373]

Great. How much power can that little TL431 transistor handle?

[@Inventor_AW]

it's all about power supply , The circuit works like a variable zener diode

[@Edmorbus]

Keep up the good work

[@Inventor_AW]

I will

[@andylayme6145]

Si aumentan mucho el voltaje explota el tránsitor de conmutación aconsejable variar + - 5 voltios para lo que estaba diseñado la fuente original

[@ccv3237]

Efectivamente, el diseño original de todo limita hasta dónde se pueda aumentar el voltaje de salida sin consecuencias.

[@cin80496]

Can I use the same part for the 12v 2.5a adapter? I will use it by adjusting the brightness of the 12v 30w bulb

[@Inventor_AW]

it's ok if it has the same feedback

[@shafiquemirza5960]

Sir maine ye cut bilkul aapke jesan banaya hai lekin mera 0 to 19 volt se aage nahi ja raha aapka 30 volt tak jata hai kiya fault ho sakta hai

[@Inventor_AW]

शायद एडॉप्टर अलग है

[@hariv3448]

при выходе меньше 12вольт бп уйдет в релаксацию и под нагрузкой напряжение станет пульсирующим при выходе больше 20вольт под нагрузкой сгорит микросхема БП .

[@lexxkrt]

можно поподробнее почему будет пульсация, там же стоит конденсатор на выходе. и почему сгорит микросхема? вроде прикидывая в голове схему не пойму как может данная переделка на микросхему влиять? там же всего-то смещение напряжения на tl431, обратного напряжения на микросхему не поступает, почему она должна сгореть?

[@bdee1084]

Can this be low noise

[@OnGodd_]

I find that Most supplies/adadpters dont even use the clear zenar diodes..

[@ikordilyera]

Can I use 50k ohm potentiometer instead of 500k?

[@Inventor_AW]

No

[@cleberjosue8879]

TOP👏👏👏👏👏

[@Inventor_AW]

thanks

[@waldemarlis2069]

@@Inventor_AW hiok bo 8 ul u no to i oo uu by

[@shusain7480]

What's resistance value

[@gabrielakakporo9783]

How do one vary the current like the voltage independently ?

[@Inventor_AW]

wait for a video

[@teste1177]

4:23min teste no voltímetro com a lâmpada ficou bem ruim de ver a leitura, mas tome 👍pelo projeto !

[@JPAG0806]

👍👍but: How to open such a sealed housing without damaging......

[@Inventor_AW]

you can use thinner

[@Mahdi-kn7tv]

این مدار در ولتاژ ۱۲ میتونه ۲آمپر جریان بده اما اگه والتاژ رو اضافه کنیم جریان کاهش پیدا می کند

[@АлександрЧуриков-ш3п]

Я всё сделал точно также как на видео и у меня взорвался транзистор,так что это не грамотно показано, сначало нужно во всём разобраться и не подвергать людей риску смертельному,ради лайков,это жестоко.

[@juankmora8599]

Siempre lo hacen con el adaptador más sencillo que hay. Quiero hacer esto con fuentes conmutadas con retroalimentación

[@tonyd1149]

Very nice. Excellent idea. Thank you for making and posting this video. God[Bible] Bless.

[@Inventor_AW]

thanks

[@keithking1985]

I like what I see on this channel. " SO I SUBSCRIBED TO YOU" THANK YOU ALL THE COOL VIDEOS, & I'll be watching. 👍🇮🇪💚🙏🏼

[@Inventor_AW]

thanks a lot

[@mickymannis]

DO YOU HAVE A PARTS LIST?

[@Inventor_AW]

TL 431 VR 500K R 47 K

[@waltp3373]

inventor forgot the 470 mfd 50v cap.

[@Inventor_AW]

@@waltp3373 yeah

[@mickymannis]

Thankyou Walt P for the missing part just don’t want to look like a tube but we’re did the digi gadget come from ? What’s it’s part number and we’re do I stick it ?? Again I’m grateful for the speedy response

[@waltp3373]

@@mickymannis He replaced the 470 mfd 16v capacitor at 1:25 with a 470 mfd 50v electrolytic capacitor. Be aware of polarity. Mark the negative (-) side before removing the old one. You can get all these parts at ebay, Amazon or any good electronics store. Hope this helps.

[@pindone]

Is this limited to 31.8v? Or will it go to 36v?

[@Inventor_AW]

32 V max

[@mangjay80]

Keren keren simple

[@juliusbacfer4634]

Magnífico video. Gracias Inventor 👍👏

[@Inventor_AW]

Gracias

[@icabod9345]

Adjustable shunt regulator in place of a zener diode.

[@Inventor_AW]

exactly

[@Carrodesom]

Dúvida..este mesmo esquema serve para uma fonte de notebook

[@luizfernandolessa1889]

Boa tarde Gil e amigos. Creio ter assistido um vídeo em que se fazia um trabalho similar em uma fonte de notebook, de 19v, se não me engano. Creio que se o circuito for parecido, dá pra fazer. Forte abraço do Rio.

[@Inventor_AW]

O importante é que o círculo de feedback seja semelhante

[@bzinhop8161]

Como faz se a fonte tem 6 Zener diode??? Remove todos?

[@Inventor_AW]

Tirei o diodo zener responsável pelo feed back e troquei por um diodo zener de valor variável (que fiz)

[@ahmedsoffy581]

nice video thanks for sharing it with us . like and subscribe . continue

[@Inventor_AW]

thank you

[@BlueScreendo]

Hello, can i use the same parts for default 24v power supply as you have in the video? or i have to use other values.

[@Inventor_AW]

yes you can

[@BlueScreendo]

@@Inventor_AW thank, And what if the zener diode is not in the source?

[@Inventor_AW]

@@BlueScreendo There must be a zener diode on the feedback, otherwise it won't work. The idea is that we replaced the zener diode with a variable one (that i made ).

[@BlueScreendo]

@@Inventor_AW but what if the Zener diode hasn't been there since new?

[@computergamesandtech4669]

Bro I want to know about the output current How much is it?

[@anomittity]

I Believe the rule of thumb is if the supply, in this case... 2 amps, and your device requires 3, the device load, it will not work fully or at all. Might damage the supply or the device because of a brown out/over current state that occurs when mismatched psu's are plugged in. If the device amperage is no higher than 2 amps, then the circuitry in the supply and the device with the correct voltage will regulate the amperage via the internal resistor set and how its configured in the regulator circuit. So just make sure your device has a supply at the voltage that is not a higher current rating than the device itself to avoid issues. Don't take my word for it, this is an educated guess. Have not messed around in over 2 decades with this stuff. Want to try to get back into it and this channel sure brings back alot of my training 30 years ago. Gotta brush up on the math again definitely! it explains it all period! Doing the math will definitely cue you in on the proper values. Ohms law should suffice. P.S. The Transformer secondary dictates the max current injected into the DC rectification/regulator circuit, and the entire output part of the circuit itself, is what regulates the output current. Why i suggested figuring out the math for the total resistance, and total voltage, employ ohms law, Voltage (v) divided by total resistance (r)...that will give you total current or amperes it will draw. (i) Good Luck!

[@Inventor_AW]

2A

[@fo4mm209]

Agree, i don't think that this mod. will drive many A's without at least, a ballast transistor or something close

[@asifsiddique6485]

If you increase voltage, obviously amperage will be decreased by the same factor(ideal condition), as a rule of thumb power remains constant. 12V X 2A = 24 Watts, You can take 24V but then ampere will be only 1A and so on...

[@blg53]

@@asifsiddique6485 That rule applies to transformers only. What actually happens depends on the intelligence of the power supply. Generally the power that is requested depends on the load, but the device will probably have an overcurrent protection so may be automatically switched off if the current exceeds the rated value (2A in this case). Remember the original design of the device is for a fixed voltage (12V). It knows nothing about power, but if it is limited to 2A the power BECOMES limited to 24W. With the modification it will still be the same, it still knows nothing about power and is still limited at 2A. So if the load "asks" fo 2A it will attempt to deliver it as the current limit is not yet exceeded. And if the voltage is set to above 12V it will attempt to deliver above 24W. This means it will probably exceed power rating of its components, overheat and burn. So unless there is some extreme intelligence (unlikely) in this device it is up to the person that uses it to ensure that whatever load you plug into this modified PS it never consumes more that 24W, the device itself will not protect from such overload. So you have to be very cautious what you feed from the modified PS. Hope this makes sense :o)

[@اميراهيادنيا-س3ب]

Please explain how the screen was installed

[@Inventor_AW]

Connect it in parallel with the output

[@ahmedelmasry1243]

Nice job 👍👍👍

[@jaimerodriguezp502]

No se puede decir cualquier adaptador no todos cuentan con diodo zener...............Bogota Colombia....

[@carlos.a.r.8356]

Parabéns. Muito útil.

[@Inventor_AW]

Obrigado

[@fadlijr4302]

Jika di adaptor ada 2 elco dan dua dioda bagaimana cara untuk mengubahnya?😊

[@enunurlela7760]

Bagaimana dengan adaptor 12v 1a apakah sama caranya

[@francescoardito8213]

Mi mandi lo schema elettrico?

[@Inventor_AW]

È semplice e non ha bisogno di un piano, basta guardare attentamente il video

[@dhairya452]

Please give circuit diagram 🥺

[@youngmex2357]

Bagaimana kalau pakai ic regulator ?

[@Denchik_vzm]

Было бы неплохо в описании указать ссылки на компоненты

[@BigPigAss]

Да ешче на тарелачке принести тебе на стол. Человек старался все снять чтоб было видно, что за детали, а тут покажи где брал.

[@littlepoison9632]

@@BigPigAss Расслабьтесь. Эта схема нерабочая.

[@lexxkrt]

@@littlepoison9632 чем докажешь кроме своих слов, в видео показано что рабочая

[@littlepoison9632]

@@lexxkrt На заборе тоже написано. Доказывать не буду. Потрать на этого шарлатана своё время.

[@lexxkrt]

@@littlepoison9632 а причем тут забор? зашел пернуть так подтверждай свои слова. автор регулирует точку опорного напряжения на тл431, по фидбеку увеличивает широту импульсов, поэтому растет выходное напряжение. понятно что при напряжении выше 12 вольт 2 ампер не будет, надо трансформатор перематывать, но напряжение регулируется. по сути это и есть принцип регулировки напряжения даже в статичном блоке питания, можешь из любого 12 вольтового 5 вольт сделать выставив правильные резисторы в делителе напряжения, как и из 5 вольтового 12 вольт

[@electronic7979]

Nice

[@Inventor_AW]

thank you

[@yuriselektro2236]

Good job brooo

[@Inventor_AW]

thank you

[@petrozaika1218]

Марка цыфрового табло, укажите

[@aminestones5379]

Harika.

[@jeffersonluizluiz7132]

Aí então terei que tirar o de 470uf 16v por um desse seu de 470 uf 50v certo

[@Inventor_AW]

Você deve substituir o capacitor 470/16 pelo 470/50

[@RixtronixLAB]

Nice video, thanks :)

[@jasmin3680]

I can use vearabil resister 470k

[@Inventor_AW]

yes

[@jotecch-br]

A fonte fica tamanho reduzido. É funcional, mas como toda fonte chaveada, é de baixa segurança. Quando queima o chaveador, a tensão sobe pra 170volts.

[@Inventor_AW]

Com resistência constante, você não precisa se preocupar

[@renansn28]

​@@Inventor_AW o que é resistência constante?

[@ВикторКононенко-л3б]

Дядя схему нарисуй

[@virusui671]

Genius🎉

[@Inventor_AW]

thanks

[@ansariumair6923]

Success hai kya

[@hennadiiredco8859]

Не слишком маленькая механическая прочность у выводов, соединённых каплей припоя? Или это просто конструктор , которым нельзя пользоваться? Разве переменный резистор не должен быть многооборотным?

[@АБТ5924]

Это капля припоя выдерживает 7 кг нагрузки.

[@АБТ5924]

Разве использованная переменка не малогабаритная? Хотя габариты переменки не имеет принципиально.

[@hennadiiredco8859]

@@АБТ5924 Откуда такая информация? Приведите источник своих специальных знаний. Я давненько учился на "слесаря-сборщика РЭА", но помню, что "паяным соединениям противопоказаны механические нагрузки". Что-то изменилось с тех пор?

[@jairocicero879]

eita

[@ursopolar6535]

Well done!

[@jeffersonluizluiz7132]

Muito bom o prejdto queria fazer um quais componentes usa e tem que subistiur o capacitor eu tenho a fonte está com esse capacitor estufado 6.8 uf 400v

[@Inventor_AW]

Desculpe-me .. eu não entendi o que você está dizendo

[@oturanboga6225]

SUPER(TURKEY)

[@Inventor_AW]

thanks

[@jasmin3680]

transistor number please

[@Inventor_AW]

it's TL431

[@jeffersonluizluiz7132]

Pode me ajudar qual capacitor posso colocar no lugar desse estufadao e o outro tá bom ele e de 470 uf 16v

[@jasmin3680]

and capacitor

[@Inventor_AW]

you can use 1000uF-50V

[@tvbox8478]

👍

[@Bezdelnik-y5z]

💯

[@СергейАлександрович-ю4п]

Ни схемы подключения, ни разъяснений... о чём видео?

[@chunyuzhou1745]

潘多拉👍👍

[@GoodoK571]

👍👍👍

[@vagull]

Супер👍

[@ploenduangsaree8983]

แล้วคาปาค่าไม่เท่ากันทำได้หรือเปล่าครับ

[@Inventor_AW]

no problem

[@ronaldodesouza2129]

Muito show

[@barbeywhetzell1983]

😊 PЯӨMӨƧM

[@tongtong-bm9ck]

👍