Modify a Laptop Power Supply 5V to 30V | How to make 12v to 220v inverter
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- Опубликовано: 29 сен 2024
- Modifying a notebook power supply
Changing laptop power supply output voltage
Increase output voltage from 12v to 19.5v for laptop power supply
Change its Output Voltage
4-30v 2.5a 60w ac/dc adjustable power adapter supply
-Facebook group : bit.ly/Creative...
-Download file here: drive.google.c...
#inverter
#12Vto220V
#LaptopPowerSupply
Although this video is cool and adds to your learning, it is still best not to tamper its original design and use external Buck/Boost converter which are fairly inexpensive.
Can I add a display to see the value
hola una pregunta se puede aser con cargador universal
hello
in other words i want to use this for laptop
but ican not
because of 3 wire input laptop
dell computer charger has 3 wires. +, - and PG. You can remove PG wire
@@PhdHung i got an HP one and it also has 3 wires (i don't want to kill it anyway i need it for the computer because the third wire tells the laptop it's not connected to any random power supply and if there is none it doesn't work so i can't use any charger! #SAD )
Cara memperbesar arus nya bagaimana master?
thank your video, i will try it and an information for you reference an alter way to disassembly the cover of adapter: ruclips.net/video/K8vys85jhvU/видео.html
and may be someone who is hard to use a blade to remove the cover.
Yes, that's a good idea. thank you
Help me
what is your problem
-Facebook group : bit.ly/CreativeElectronic
Schema: drive.google.com/file/d/1ZyjiX1zXj_KQnTlLPyEWNVHBI7naU4ir/view
Ya I tried to modify a cheap China xbox one power supply and after I finally found the voltage devider or what all I got was like 9v to 20v buy once I got it all back together it's more like 10v-16v
You shouldn't remove the class Y1 capacitor as this creates tons of interference, and for example a phone charging from it will lose touchscreen ability (or almost)! After disconnecting it the touchscreen is fine again but you can't use it while charging!
You should better ground the output!
If you have no ground then connect the negative output to neutral with 1M resistor, but make sure it's NEUTRAL and NOT LIVE!
uh now I finally know why some old phones won't work while charging with one specific charger
This depends, I belive this is commonly done to enable connecting PSUs in series.
Lo que observo es que el plano que presenta no corresponde con el de la modificación-
thosiba brand adapter circuit is different and I found it difficult to find the feedback resistor. please help
What ever be the SMPS or adaptor find TL431 has 3 pin leads, Leave the Grounded pin and one more pin connected directly to Opto coupler also leave that and the remaining pin connected to dual resistors 1st resistor (R9 in this video) one end connected with the remaining pin of TL431 and other end with ground. another VR and resistor in serious are coupled as a single resistor with o/p voltage pin. So find out easily by using multi meter at continuity checking mode and check remaining pin of TL431 and connecting resistor other end is with +o/p and another similar resistor with ground . thus these 2 resistors need to change 1 by fixed one and another by pot. thats all.
After his video I have done several adapters.
Why did you removed the safety capacitor that was a class y capacitor that is rated for 1000 volts or more and its there for safety and you removed it for no reasone
I want to insulate between GND HV and GND LV. In my country, there is no earth wire.
@@PhdHung yeah it wont matter.... although the cap only allows microamps it can be at quite high voltage so can damage sensitive circuits and chips so can see why you would remove it
When removing it you get a lot of interference, and if you set 5V and charge a phone the touchscreen won't answer or very badly because of this interference!
You need the class Y1 capacitor, and if you have no ground you can connect a 1M resistor between neutral and negative output (it will do the job but make sure it's NEUTRAL and NOT LIVE!)
I need quick reply please.. I'm going to modify 24v 2.5 A adaptor the smd feedback resistor is 1k I removed it and hope to use 5k vr but what is the resistor I must use with vr
I have a question i hope SOMEONE can answer. I have a dell G3 gaming laptop and the charger says 19.5v but can i use a gaming mouse (3v needed to run) and a gaming key board on it (5v needed) would I burn out my laptop??
Error in schematic U1 VCC, R1, C3 some dots are missing. DONT remove the very important noise capacitor at 4:32 it is NEEDED for EMC radiation
Yes, it caused electric shock, so I removed it.
@@PhdHung cool, then it was simply defective, then it is better replaced, since its purpose is to close the high frequency loop, where the other halve of the problem (signal noise generator) is the capacity from primary to secondary side in the transformator, this cap close this, and avoid huge radiation between prim-sec side
thanks. I know that.
Here you must check also aux voltage. PWM IC is driven direct from a winding that is corresponding to the output voltage. UC38XX can get very hot at higher input voltages. Why did you remove the EMC capacitor?
I see there is 1 15V zener diode there, so the voltage is always a steady 15V. I removed the capacitor because the grid in my country only has 2 wires. There is no ground wire. If not remove the capacitor, when touching the output. I will receive a slight electric shock
@@PhdHung Ah ok. Then this was only a sample schematic and this is a supply with PE on secondary -. The 2.2nF capacitor in the schematic were normally ok for touch current requirements for class II supplys. There can be some other issues if output voltage is higher then designed but this supply has apparently enought reserve for that range for normal input voltage.
I did something very similar, new plans from Avasva helped me with this.
@@PhdHung
Aye Boss ok so i have a Onn Universal Laptop power Supply blah blah blah Which resistor would i be replacing with the Potentiometer exactly if you could help me with that. I mean i have another brand one also... which ever would be easier to explain or that you may have handy also. Thanks in advance
Sir thank you very much sir my dopter is not having tl431 ic how to make it variable?
Hi! I just got amazed with your video because I need a smal power supply to my experiments. I have a GlobTek GTM96600-6024-T3 24v 2.5Amp that I would like to increase the output voltage to about 30V so the StepDown Buck Converter I have can work better to stablize up to 24V at output. On my inspection at its circuit I found it uses the IC EA18362 and the reference is a SMD with the id of GCA (not TL431). The resistors used are far different from the ones at your diagram. On this GlobTek I found the "R12" as 214k (200k + 14k) and "R9" as 24k (yours are 2k+pot5k and 790R respectivelly). I would be greatfull if you may help me.
Men como consigo echematic de una de 24v de impredora me podrias ayudar es para hacer una fuente de laboratorio tengo 2 iguales
there is an error in the connection point of the resistor R12, should be connected to the negative of Vout and not to the positive. on the other hand R14 is also badly connected.
Saludos . Amigo ise es trabajo para usarlo para cargador de pila lifapo4 y la rebaje a 14.5 vol pero se protege y se dispara el cargador
Pa maaf saya mengikuti bapa canget bkas leptop pkai LM137 dan 2N3005 dari 19 vol busa turun jadi 1vol untuk servis hv tapi pa ngan bantuanya kenapa pA ga bisa 19 vol sesudah pjai Lm137 ic sebelum ic 137 bisa 19 vol gimana selusinya maaf?
The biggest problem with this change is higher the voltage lower the current as watt would be fixed...
How to address the issue...higher voltage with hiring the current?
Why did you removed ceramic (blue) capasitor and how i could find a feedback resistor, on my power supply i dont have diode (u4) on ur so..
I know I'm late, but maybe you still didn't find out and wonder. It's not a diode, it's the TL431, need to understand the circuit a little bit to find it by logic, it drives an opto-coupler and should be marked as "U" on the pcb, it could also be in a to92 housing or the psu work another way.
Can we convert this Charger/adapter in to 67.2 Volt Adaptor?
I want to make 67.2 Volt 2Amp/3Amp Adaptor.
Can you help it.?
67,2 ? for what?
can you add a pot for the current?
Why remove capacitor (blue cap. near the optocoupler) ? please info
capacitor that connects high voltage GND and low voltage GND. I removed it because it could cause electric shock.
@@PhdHung That's a capacitor filter. Probably to send any residual 60hz AC from the low voltage side to GND. No reason to remove it. If you're worried about shock while working on the circuit, just short each capacitor with a tool with an insulated handle and then work away.
How many amps is the output 5-30 volts ?
I had ibm charger, output 16v 3.5amp.it has lm358 with 10k preset on secondary side. And tl431 with 1 and 3 pin shorted. Can I use same method to make it variable voltage output.
The overall adapter power remains the same. If voltage increases, the current decreases and vice versa, however the max current is still the limit of the secondary winding of the transformer.
Thank you for your explanation . I need your help , I tried to do but fixed voltage 24 V , it´s a 15 V power supply with IC OB2263 6 pins but I only can have 21V , when try to increase to 24V it protect itself and goes to 0V . Please help .
CANT 15V TO 24V (DO THIS SOME TIME BLOWING THE POWER MOSFET,
YOU HAVE TO FIND 19.5V ADAPTOR
What's happening there is you are trying to over switch the ic. The so called modification here is actually increasing the duty cycle of the switching ic. You can't go beyond a specific T on.
Where's the point where you have fixed 750 ohms as per your alterations. Also thank you so much for providing the schematic diagram of the SMPS.
quên còn mua cái đồng hồ vôn gắn song song với ngõ ra nưa là thấy số cần sử dụng. ....he he he ,anh lai rồi nha em
I did the same with Toshiba charger and managed to make variable adjustment to voltage but once it go under 13v it became unstable and drops to 0v and fluctuate between 24 to 0v until I change the pot, can this be fixed?
Very difficult, you need rewinding the transformer.
please, type compnents changed.
Wow, what a nice psu, clean and a lot of spacing, I have never see one that is not shielded and without that annoying silicone.
yes. Here's a cheap psu, it's very simple :D
I have done as you say. but it is pulsing when voltage is lower or higher than 19V. Please advise.
Me too
Thank you my brother. You are truly amazing.
Chào bạn, bạn co thể giúp minh xác định con điện trở feedback trên adapter của mình dc k ah?
cho hỏi 1 tí ,cục sạc asus 19v 4,7A đầu ra có con ic ba chân 431-4MTB có 2 chân nối với 1 con trở nhỏ .anh thay con điện trở chỉ số bao nhiêu để ra 24v vậy em,đầu ra có 2 tụ 25v-1000uf,có cần thay 2 con tụ giống em không
anh thay con biến trở vô, vặn đến 24V thì rút điện, đo xem bao nhiêu ôm rồi thay bằng con trở cứng vô. nên dùng tụ 35V hoặc 50V cho an toàn anh
@@PhdHung ok ,cám ơn em, cách này hay với anh.cám ơn nhiều,he he eh
and how can i figured out witch is the feedback resistor can someone explain me?
thx
HELLO DEAR
DELL LAPTOP HAS 3 WIRES FOR OUT PUT NOT 2 WIRE!
WHY?
TNX ADMIN
The third wire tells the laptop what charger is connected (90w 100w 120w etc) and that its a genuine charger or not
It doesn't matter, use the two wires you get 19V in between of!
at 10:03, suddenly I saw a quarter watt resistor, which you did not show while mounting it and what is value of it ?
resistor 4k7 for LED :D
Nối con trở này từ mát sang chân điều khiển hay từ chân còn lại sang con opto thế bạn ?
Tks
Thay con điện trở phân áp nối xuống mass thành biến trở là ok. Cái này dễ mà, bạn coi lại video có sơ đồ nguyên lý đấy.
27 voltta kaç amper veriyor
I have 24vDC 2.5A adapter and I doing as show in video but out is 5vdc
I want to get a voltage of 21 volts. What is the value of the (fixed) resistance
Hi how can i add current limiter in this laptop charger? About 2 to 3 amps
here 320volt.com/en/battery-charger-with-flyback-smps-mod/
can this be applied to all adapters with the same voltage, for example different brands..??
Thanks...
Does it do for 12 batt adaptor
You share very detailed, responsible and thank you for sharing your knowledge to many people, thank you again.
Mas bro... Aku ada liteon 19v 7,1a dimana nyari skemanya. Dari kemaren nyari belum ketemu.
How to find the feedback resistor? I have a different kind of charger and I really don’t know which one of the resistors is the feedback. I don’t know if you can help me with that?
A trick I have found useful--look for the high-precision resisters, i.e., 4 digits for surface mount, and they are normally in the 2K-15KOhm range.
Cấm như hến ai hiểu (?!)
can I help me change dc ac voltage is adapter charge to output 24v.
👍
Bạn ơi bạn làm rất hay và chuyên nghiệp
Excellent!!!! Do you have a Rumble channel??? And why the long fingernail???
Nice. Do you know if it will work at 30v for a long time?
Of course
@@PhdHung no, probably not! You have to change the output diode and use a diode that can handle a higher peak!
mantaaaaaaaaaaaaaaaaaaaaaaaab..
Why remove capacitor?
gud day sir...why you put a resistor at the back? where it goes?
mantabs bro
Watt would be same...higher the voltage lower the current...
yes
that is not inverter
Dont need to remove vlue capicitor, you just find tl431 pin resistance and. Just remove it. Further change capicitor and use only one capicitor 1000 uf 50v or 100v. Its work best.
Why only one cap? Two small provide better filtering and is often easier to fit. But 50v rating provides some extra headroom and is smart considering the operating conditions in these non-ventilated units. 100v is just a waste of money and would not fit inside the case. You cant substitute voltage rating for capacitance.
If your goal is improved filtering you could relocate the last cap to the unused V-2 and V+2 points, cut the positive trace right after the original location of 2nd cap and bridge with an inductor. This would be a huge improvement as far as noise go. If you want, you can think of it like only one capacitor... just with an added L2 filter.
That being said, dirt cheap capacitors have no place in these things. Two high quality 50v 470uf with 105c rating is about $1.
If you are going to use these things as a variable PSU for projects and testing, filtering is important and even crucial when dealing with ICs and microcontrollers.
Awesome!
Great, i'm also have a power supply like that, but position of resistor feedback is diferent with you, would you tell me what code for resistor feedback that you pull out?
Remove resistors connected to gnd. Find it near tl431
@@PhdHung All i do it is done, but if the voltage below 18V beats a sound, the more clearly audible if the voltage is lower, the led blinking, the voltage unstable, how to fix it ?
Did you removed the cap ?
I mean miler cap
cái này hay ....để anh làm 1 cái ,rồi chỉnh áp sạc pin máy khoan .....he he he
cái này dễ mod lắm anh
@@PhdHung anh mở 1 cục sạc asus thấy không giống cái của em....nhưng từ từ anh mò .....chắc cũng ra ...he he he ...cám ơn em đã đăng
The higher the resistance the lower the output voltage or it will go high to?
If the resistance is large, the voltage increases
@@PhdHung depends on which feedback resistor you change as there are at least two of them in a divider bridge!
Top
does the amperage value decrease. if the volt is increased the voltage
भाई आप ने जो मल्टी मीटर यूज़ कर रखा है तो कितने का है
what is switching power mosfet number?..
Who has these spare electronics laying around? "OH I WILL JUST USE THE 30V ONE!" NOT!!!! so dumb
There are people who consider electronics a hobby. They have lot of spares lying around. Some of us keep PCB s of old TV, audio equipment and other electrical/electronic devices just to pull out needed parts. Same with power supplies. I may have no less than 50 of them lying around in a cardboard carton in my garage. You have no idea what someone who knows a bit of electronics can save for themselves and their friends, especially if there are places like value village/thrift stores or electronics recycling depots where they allow you to grab stuff for free or just a couple of dollars. Not dumb.. it is a skill.
12 to 220v?
so it was possible this high and low voltage because the power supply does not have overvoltage protection, others better mounted has protection and is possible only 4v down and 4 up
Marlon Diego in that case you remove the overvoltage protection if it has some integrated chip for the working proces just diseable the pin for that and its done an if it isnt with a chip just short the two legs on the optocoupler on the primary side
Nếu sạc nó k dùg tl431 thì mod ntn ad ơi?
hầu hết sạc lô là đều có, sạc zin thì mò đường hồi tiếp của nó rồi mod thôi.
Homemade 102 thanks ad!
Sir will the output current remain the same or change.
I'll get
6:57 b
Thank you my brother from egypt
İncelikleri göstermiyorsun malesef
Merci pour la vidéo
Please what components did you add to the original board and which one did you remove
I removed the feedback voltage resistor and replaced it with potentiometer
Which and which are the value of former feedback resistor
5k
why remove the capacitor
Good tiching karte hai 👌👍👍👍👌👌👌👍
Nice works Am trying the same using delta 12v 1.6Amp EADP-18WP adapter PCB model started reworks working near opto coupler.
I have done it successfully and plenty of verity of adapters such.
This project is very good!
Sir plz 20 amp chrgr say banoo
Hy gys my adopter modifi but 12 volt work and above voltage used than trip on off on off supply not working
Check with Zener protection diode
is that power supply can charge the battery??
what value potenciometer was used?
VR 10K
Thanks for explanation it very illustrated my brother
How can I know which are the feedback resistors?
Find the resistor connected to tl431 reference pin to +
@@smoke_stackz3168 que balor de resistor es la que le pusiste en la placa o que balor es la resistensia si mepuedes desir por favor
But 🙄 of kyo nikala
Can change resistor 10k?
Kya isse 24 volt lithium ion battery charge kr site hai?
Good job!
Thanks bro