This is universal for all adapters that if you change that specific part you can change the voltage. So in conclusion you would need a scheme for all adapters and that is not possible since this is meant only as a example. Thanks for feedback i wish you a awesome weekend.
Great idea. I never thought of this. The TL431 shunt regulator is in almost all power supplies for regulating the output voltage. I will have to keep this in mind next time I need to change the voltage on a laptop power supply. I salvage these when ever I can from folks who just throw everything away or I get them for a dollar from thrift stores. Great high amperage PSUs. Great PSU for powering LED circuits.
If you need 14.5k of resistance, and already have a 27k SMD resistor in-place, you could have soldered another 33k resistor on top, or with a 1/8w axial resistor between two existing pads that are electrically connected. Then you'll have 14.85k Ohm, without having to painfully remove that SMD resistor. And quick and easy to change it back to factory voltage without finding that darn tiny resistor you took out.
Sir I have hp computer charger which provides out put supply 19 volt but I require only 12 volt .please guide possitivily.hope you will definitely answer.
I'm trying to lower the voltage according to your video. One question before I to do so is why decrease the resistor instead of increase it to lower the voltage? I'm worried and want to make sure to avoid any accidents may occur. Thank you.
Wondering if someone can help me change the voltage from a li-ion charger from 54.6 to 52v. I do have soldering skills, just not the skills to figure how to do the convert(what to change and where)
Sir Thank you my laptop adapter out put is 19.4 but know its coming 21.4 laptop display also not coming sir and power supply So can I try this method to my adapter or any component I want to change please tell me in reply sir Thanks again
Hello! The original output of my adapter was 24v. I dropped it to 19v. But the output voltage is not stable. It fluctuates between 17 volts and 19 volts. Why?
hello please I want to change the voltage of HP adapter(model: series ppp014) from 19V, 4.7A to 12V, 500mA '. Which resistor will I replace and with what value of the resistor
or just make an external board with multiple resitors and a switch to change the voltage so u dont have to open the adapter and it will serve you without soldering every time u need different voltages.
you need to lower the resistor smaller. as in the video. we have reduced the resistor from 27ko 19v to 14.50ko 12v. but be careful without multimeter don't try
i have lenevo laptop charger which gives me 20 volt can you please give me your email id so that i can send you the picture of the laptop charger for further guidance from your side . to control the voltage as per my desire .
need help with my bosch gml50 radio .went crazy after year on the attic. All buttons works randomly round ones volume and station change 🤔any clues how to fix it ?please please please 👍😉
May be a schematic would be helpful
This is universal for all adapters that if you change that specific part you can change the voltage.
So in conclusion you would need a scheme for all adapters and that is not possible since this is meant only as a example.
Thanks for feedback i wish you a awesome weekend.
@@RepairAllTV - Very good video!
Can I also make voltage of the adapter higher if I use higher value resistor?
Merry Christmas.
@@thekaiser4333 Yes, that's how it is. you understood. good video
You can find a short but clear schematic guide at 7:08.
My 19012 Kaise banaa
Great idea. I never thought of this. The TL431 shunt regulator is in almost all power supplies for regulating the output voltage. I will have to keep this in mind next time I need to change the voltage on a laptop power supply. I salvage these when ever I can from folks who just throw everything away or I get them for a dollar from thrift stores. Great high amperage PSUs. Great PSU for powering LED circuits.
I just increase voltage on 12 V adapter so i have 13.5 v charger for fusion splicer .Thank you for sharing this. very nice tutorial
If you need 14.5k of resistance, and already have a 27k SMD resistor in-place, you could have soldered another 33k resistor on top, or with a 1/8w axial resistor between two existing pads that are electrically connected. Then you'll have 14.85k Ohm, without having to painfully remove that SMD resistor.
And quick and easy to change it back to factory voltage without finding that darn tiny resistor you took out.
it's work for me :)
the test with water is very ingenious
thank you
Great video! Clear and efficient!
Very informative video, thank you as I learned something new today.
👍😊😊
Yeaaaa .. loved that black probe xD
Any change in output current after you replace the resistor? Thanks for sharing.
ii have a charger it dropped from 20v to 5v tks looking for a fix
Nice and excellent video
Sir I have hp computer charger which provides out put supply 19 volt but I require only 12 volt .please guide possitivily.hope you will definitely answer.
I'm trying to lower the voltage according to your video. One question before I to do so is why decrease the resistor instead of increase it to lower the voltage? I'm worried and want to make sure to avoid any accidents may occur. Thank you.
because V = I * R so V decrease linealy with R. Other words a smaller Resistance will give you a bigger V = Voltage
Wondering if someone can help me change the voltage from a li-ion charger from 54.6 to 52v. I do have soldering skills, just not the skills to figure how to do the convert(what to change and where)
Sir, is possible instead add a 20K potentiometer plus a resistor of 12K on the output pin in series for get a variable regulation around 24V to 10V?
অনেক অনেক সুন্দর ভাবে দেখানো হয়েছে ও বুঝিতে পারি লাম
Agree
Sir Thank you my laptop adapter out put is 19.4 but know its coming 21.4 laptop display also not coming sir and power supply
So can I try this method to my adapter or any component I want to change please tell me in reply sir Thanks again
How did you open it?
Knife/screwdriver
What's the formula for calculating the resistance you need for a desired voltage?. I would like to try and get 15 volts or 8 volts. Thank you!!!
Hello! The original output of my adapter was 24v. I dropped it to 19v. But the output voltage is not stable. It fluctuates between 17 volts and 19 volts. Why?
that is because of the load, unregulated output voltage will drop if loaded
hello
please I want to change the voltage of HP adapter(model: series ppp014) from 19V, 4.7A to 12V, 500mA '. Which resistor will I replace and with what value of the resistor
Nice vid I have a question could a charger that is giving 18V on a computer that calls for 19V, mess up the battery ?
No a bit too little won't hurt. Test eith something old..
?19.5 volt to convert 14.4volt .. which resisitr will be use to make it battery charger ??
Thanks you ❤️
Very gud video ..Thanks
are we able to run (240 volt 50 hz 10 w input requirement) wire trimmer from this 19 v adaptor ?
?for 14.4 volt which resistr will be use????
Thank you
Sir ap ki video bht achi ha
Kea es supply k input volts ko km kea ja sakta ha
16_200 volt dc pa on ho jay or output pa 12 volt
or just make an external board with multiple resitors and a switch to change the voltage so u dont have to open the adapter and it will serve you without soldering every time u need different voltages.
Excelente
There are so many resistors near the transistor.. which one to remove pls reply 😕
just use your meter to check resistor directly connect to positive pin of TL431
amazing video
I want to know the power supply 19v can change the 12v battery.
Good view
Helpful
what is that transparent stuff? that suddenly it lowers the voltage for a moment in 5:18
Thank you pro
Can i use this 12v charger in a 12v motorcycle battery to charge it?
very good
18v adapter me mujhse resister lost ho gya h please mujhe bataeiye ki kha or kitne om ka lagega
I've modified a 19V laptop AC adapter to 12V but the output is unstable. How do I make it stable 12V?
is this stable?
Good
What resistor would i need too vonvert too 14.8 volts
Im guessing 21kohm
12 volt +14.50ko Kon si resistor he plez bolo ji
is it possible to do the reverse? i.e. 12V to 14V
yes. can only be careful voltage. control with multimeter
...but you will make the transformer heat up more by doing that.
14.50 ko resistor ?????
Use a potential meter aur a variable resistance along with 10ohm resistance in series and you can obtain desirable voltage 3 to 24 v
I often go to Vietnam
In other words, how do I get any voltages I want on the output and how do I determine the exact resistance to them, is there a specific way ..?
you need to lower the resistor smaller. as in the video. we have reduced the resistor from 27ko 19v to 14.50ko 12v. but be careful without multimeter don't try
@@RepairAllTV Well ,,, if you want to get voltages at the output about 7 to 8 volts, how much resistance is required
@@abuazzam7881 play with them resistors there thats away to find the answer
Sir kya 12 v 100 amp battery per laptop total use krskte hn bagair 220 k?
no
Cut out the noise.
12 volt + 14.50 ko resistor full details
My 12v 2 amps adapter gives 16v at start and then going to fall and fall down how can i solve this please reply me soon
you need another adapter
can we control the voltage where 2 optocoupler inserted
Yes
i have lenevo laptop charger which gives me 20 volt can you please give me your email id so that i can send you the picture of the laptop charger for further guidance from your side . to control the voltage as per my desire .
I want 48 voltage, how to do this?
Irni mehnat krne se acha isme 3ohms ke 2 resistors series mai laga lete
👍👌
12 volt +14.50 ko resistor iquvalence
hi .. if I want to get any voltage at out put for ex: 7v ...9v etc , how can get that voltages ...?
teoreticly , put a higher value resistor there
@@allexandruprroca6713 lower
Too good....but too difficult...!
need help with my bosch gml50 radio .went crazy after year on the attic. All buttons works randomly round ones volume and station change 🤔any clues how to fix it ?please please please 👍😉
Oki merci
👍👍👍
well i want 22 volt
+1
nice
I got into high voltage prob then when my plug my charger my house lights and everything shuts off what this means can anyone know.
Salut
S.v.p auto-radio peugeut 308 blouquer sur mode silence pas de son
Le volume ne fonction pas
Pas de son
Comment deplouquer le mode silence
لن نسمعك ياخي.
what a mess
So much time wasting then you dont show the important bits like how to open case??