Nice explanation, but one warning is missing: Check the voltage of the output capacitor. When you cross them, you can be sure that one day it will explode. OT: The TL431 can replace the zener voltage control. OT2: If there is no zener diode / TL431 on the secondary side of the power supply, then maybe you've hit the treasure. In my case there was the TSM101AC (sop-8) chip. After looking at the datasheet, I found that there is also a possibility to regulate the current.
@@danniananta199 Sorry, no video. But look into datasheet on page 10 (EVALUATION BOARD - TECHNICAL NOTE) - there is all explanation. You need replace R6&R7 (high precision, more digits on it) "Middle" point is connected to 7 leg of TSM101AC. Fot R6 I'm use 720Ohm, and for R7 2,75kOhm shift + 20k potentiometr.
Set it to 4 volts and connect a load. You will see that it doesn't work. The IC on the primary side has UVLO (undervoltage-lockout) protection. When you set the voltage below 14 volts, it switches to integrated protection.
Sir mere paas Dell ka charger hai to usme 3 se 20 Walt tak sahi chalta he lekin usse jiyada walt badhata hu to series bulb chalu ho jata he or jiyada der on rakhu to 470 mf 50 v ka cepasitor he fat jata he
I tried opening two laptop chargers but could not find TL321 transistor. Useful video if you are lucky to have TL321 but most of the circuits doesn't have one. It would be better if you can mention the adaptor model and make.
Sir kya amain apne car ka vacume 12v jo max 120w output wala h usko apne laptop k adapter se jo 90w 20v ka hain jo 4 se 5 amp output deta h kuch kharab hoga or kitne der chala skte h
Nice video Great explanation. Sir 12v 20amp battery charger ka banado Jo Kam is Kam 8v to 60v tak jata Hain ... UPS / Inverter checkup kailia . Please must replay
@@TARIQLAB sir g Mai special waiting Mai hon ajj say ... Q k mujai lazmi chahiya Mai inverter technician hon Inverters/ UPS checking kailia banata hon ... 🙂♥️
First of all, I would like to thank you for the enlightening and educational information. I have a 19 volt laptop charger, is it enough to replace the 3.9 kohm resistor with a 10 k potentiometer to adjust it?
This looks like a very cheap quality circuit. I had an extra charger (Dell) that is very complex and also they have added lot of thermal adhesive on the components that makes it difficult to modify.
Ic ki pin 1 potentiometer ki center se connect ho gi, potentiometer ki side wali pins aik + wali resistor aor dosri ground wali resistor ke sath lagy gi
Tariq saab, very well done. Can this be modified to do variable from 1.2V and up ? I am not too much concerned with higher voltage. Appreciate you sharing this information and vast knowledge.
Bhai me router or onu ka liye ak battery pack banraho..liken mera adapter thik thak voltage deta hai likin battery low hogeya tho mera adapter on of on of ho rahe..me kaise a problem solve koro plz
not precise at higher voltage and dangerous to operate like this, i gwill give you the best solution by using a range of fixed resistors for every voltage needed and a switch selector, its safe like
But this is not possible. Power supplies designed for a certain fixed voltage value can work well with very close values but certainly not as distant as in this case. If it's a PSU designed for 18v and 2A It won't be able to deliver the same power at 8V and at 36v, as, someone write here, at 36 you will blow the output capacitor which will not be at the proper voltage and other problem of switching at 8v or lower.. The switching power supplies capable of going from a few volts to 30 volts are designed taking into account this need and have adequately sized components, certainly more expensive and bulky components because they are suitable for situations in the two extreme limits
Regulation & amp controlled by primary side, lm431 is like a variable zener to feed back primary though optocoupler. It gives variable regulated full amps.
BONJOUR svp premièrement 1 je veut avoir un convertisseur de dc vers ac 12V DC to AC variable ( 3V 12V 24V au 30V AC) . 2 SVP je veut encor pour fabriquer un variable de AC to AC AC 220 V vers AC de 3V AC a 30V AC //// merci beaucoup chemachema
Nice explanation, but one warning is missing: Check the voltage of the output capacitor. When you cross them, you can be sure that one day it will explode.
OT: The TL431 can replace the zener voltage control.
OT2: If there is no zener diode / TL431 on the secondary side of the power supply, then maybe you've hit the treasure. In my case there was the TSM101AC (sop-8) chip. After looking at the datasheet, I found that there is also a possibility to regulate the current.
mine has a TSM101AC with 817 optocoupler. but i stiil can't figure it out to make it adjustable. Do you have a video for that?
@@danniananta199 Sorry, no video. But look into datasheet on page 10 (EVALUATION BOARD - TECHNICAL NOTE) - there is all explanation.
You need replace R6&R7 (high precision, more digits on it) "Middle" point is connected to 7 leg of TSM101AC. Fot R6 I'm use 720Ohm, and for R7 2,75kOhm shift + 20k potentiometr.
In my case there are two optocouplers and ic Ap4310.
Also there is no tl431.. how can i trace the feedback resistor?
Please help
Set it to 4 volts and connect a load. You will see that it doesn't work. The IC on the primary side has UVLO (undervoltage-lockout) protection. When you set the voltage below 14 volts, it switches to integrated protection.
Great sir..! I was searching for such handheld supply from hall road lahore .sir you operated the laptop power supply nice and easy . stay blessed!
NoooOooo man! Looks like an amazing video, but please why no English subtitles?!?!
ماشاءاللہ بہت اچھا کام کیا ھے.مہربانی فرما کر کمپیوٹر کی سپلائی کو اس طرح ویلی ایبل کا طریق بتا دیں جزاک الله
Ap load laga k check karwatey tou acha tha malomaat ho jati mazeed.good
Gracias Maestro, saludos desde Mataró Barcelona. 👍
de nada
Nice tutorial ❤ thank you
Pls do change secondary filter capacitor to 50 volt
Very good expa__n
Jazakalla khair.
Tariq Bhai aap bahot achhi tarah samzate Ho
Shukriya
Sir bahut achcha explain kiye aap subscribe to banta ❤🙏
Thank you ♥️
you must test it by a load like bulb 12 or 24 volt 30 watt or more to know if its stable or not
Yup, they are not stable at the higher voltages. But fine at or lower than their original output.
Info very helpful
Shandaar ❤
Sir mere paas Dell ka charger hai to usme 3 se 20 Walt tak sahi chalta he lekin usse jiyada walt badhata hu to series bulb chalu ho jata he or jiyada der on rakhu to 470 mf 50 v ka cepasitor he fat jata he
Aga 10k ka controller lagaye toh kya 330omhs ka resistor lagana hoga ?????
I tried opening two laptop chargers but could not find TL321 transistor. Useful video if you are lucky to have TL321 but most of the circuits doesn't have one. It would be better if you can mention the adaptor model and make.
It is not TL321 but TL431....
Yhi bat mere dost...TL431 not TL321
Confunde que uses cables del mismo color..! Puedes mejorar ese detalle.gracias..!
Nice information sir
Sir kya amain apne car ka vacume 12v jo max 120w output wala h usko apne laptop k adapter se jo 90w 20v ka hain jo 4 se 5 amp output deta h kuch kharab hoga or kitne der chala skte h
Volt ziyada hain, 12v hi hony chahiye
Nice video
Great explanation.
Sir 12v 20amp battery charger ka banado Jo Kam is Kam 8v to 60v tak jata Hain ...
UPS / Inverter checkup kailia .
Please must replay
Jaldi try karon ga
@@TARIQLAB sir g Mai special waiting Mai hon ajj say ...
Q k mujai lazmi chahiya
Mai inverter technician hon
Inverters/ UPS checking kailia banata hon ...
🙂♥️
Thanks so much mr.tarq
Jis circuit me tl431 na ho us case me kia kreinge?. feedback resistor ka kese pta chlega?. please guide
Ye video tl431 wali ki hai
Merci beaucoup pour la vidéo c'est super cool 😎
First of all, I would like to thank you for the enlightening and educational information. I have a 19 volt laptop charger, is it enough to replace the 3.9 kohm resistor with a 10 k potentiometer to adjust it?
1 से 24 वाल्ट व 2.5 ऐमपियर का बनाया हुआ अगर आपके पास होतो हमे चाहिये कृपया प्राईज बताऐ व केसे हमे प्राप्त हो बताऐ
This looks like a very cheap quality circuit. I had an extra charger (Dell) that is very complex and also they have added lot of thermal adhesive on the components that makes it difficult to modify.
اتمنى ان ينجح عملي مثلك سوف اقوم بتجربةهذاالمشروع شكرا جزيلا
Good video. Just write me how many ohms is the resistor on the potentiometer? Thank you
330 Ohm
а конденсаторы кто будет менять электролитические на холодной стороне, петя? выходное напряжение повысилось.
Very good
Good explanation
Kai yeh mobile testing main use hosakta hy kai
great bhai
Thanks. Pls list the items used
Assalam u Aleyikum.
Bhai maine resistance remove kr k, potentiometer lga diya hai, lekn voltages regulate nhi ho rahe.
Ic ki pin 1 potentiometer ki center se connect ho gi, potentiometer ki side wali pins aik + wali resistor aor dosri ground wali resistor ke sath lagy gi
Bhai ese hi lgaya hai. Main apko sari pics send krta hoo.
Great idea, TY
shukriya jnaw
Çıkış kondansatörünun yüksek değerli bir kondansatör ile değişmesi gerekiyor yoksa 💥
evet haklısın, adaptörümde kondansatör 50v idi, bunun 50v olması gerektiğini belirtmeliyim
Tariq saab, very well done. Can this be modified to do variable from 1.2V and up ? I am not too much concerned with higher voltage. Appreciate you sharing this information and vast knowledge.
1.2 v very low to operate the TL431 ic. U can use my other power supply that will work 0-18v when u give 18v from this type adapter
mera adopter lagataar suply nahi de raha ruk ruk ke deta h Pulses ek second bnd ek second chalu...
GOOD IDEA
Creative video, thanks :)
I did same but not getting exactly, perfect from 9-24 v, but fluctuating below 9 v. Any help ?. Thanks in advance.
I think potentiometer not good
Was the three wiees from potiometer linked to the three leg of Lt431? Or?
Potentiometer center pin to tl431 pin 1, pot other one on gnd one on positive
Volt Meter and emper bhee Iske sath video bana dee plz
Jaldi try karon ga
Good work
Thanks for sharing
Bhai sb ampare ktny hain. Battery ampare par chg hoti hain volt to 12 hi boht hain
Charger ke jitny amps hain wo mil jaty hain
Is se fan chla sktay hen 25v pe ?
Chala sakty hain
Voltage blkl stable hen iske load pe 30 tk ???? Ya kam zada hote rhengy stable nhi dega ?
Stable
Is the voltage/current stable when delivering power to a constant load .
Same preset method is used when it giving 18-19v for laptop,
You must know voltag, watt, then you can adjust the your required.
Bhai me router or onu ka liye ak battery pack banraho..liken mera adapter thik thak voltage deta hai likin battery low hogeya tho mera adapter on of on of ho rahe..me kaise a problem solve koro plz
Adapter ke ampere kam hain
not precise at higher voltage and dangerous to operate like this, i gwill give you the best solution by using a range of fixed resistors for every voltage needed and a switch selector, its safe like
Can you teach me how to make a dc fan regulator
@@olarinoyedamilare5136irfz44n MOSFET with 10k pot and 25v 100uf capacitor will work
Will it's watts should remain same. ?
Mean if original if it is 18v and 2 amp
Will of give 12v and 3amp ?
8v or 4.2 amp ?
Yes
@@TARIQLAB Have you actually checked and measured that?
But this is not possible.
Power supplies designed for a certain fixed voltage value can work well with very close values but certainly not as distant as in this case.
If it's a PSU designed for 18v and 2A It won't be able to deliver the same power at 8V and at 36v, as, someone write here, at 36 you will blow the output capacitor which will not be at the proper voltage and other problem of switching at 8v or lower..
The switching power supplies capable of going from a few volts to 30 volts are designed taking into account this need and have adequately sized components, certainly more expensive and bulky components because they are suitable for situations in the two extreme limits
In one word: NO!
old laptop charger se 12 volt dc motor chalata hu to ruk ruk kar chalta hai. solution pleas
Motor voltage short kar rahi hai,
I have 24V circuit no tl 431 transistor? How can do variable volts.
find there will be a zener diode.
If i want another fixde 12v line then how can i do thise
If it has TL431 then all same
Sir I need to 1.5v up30v pls
Hello, how many kilos is the resistance that you connected to the potentiometer? And how many kilos is the potentiometer?
Potentiometer 5-10k resistor 330 Ohm
Sir 1 baar multimeter ka price batao naa
$1200
Good work and great information.. please provide your contact info . I want your advice on my laptop charger modification
Whatsapp in my channel's description
Assalam walikum
Salve, se mi potessi fare tradizione in italiano lo ringrazierei. Comunque sei molto bravo
quello che ti serve
Ho un alimentatore 230v a 5v che non funziona più, ho aperto non riesco a trovare il problema
Checking voltage alone isn't enough!
You must connect a load test and show us the CURRENT it can supply at various voltages!
Regulation & amp controlled by primary side, lm431 is like a variable zener to feed back primary though optocoupler.
It gives variable regulated full amps.
@@TARIQLAB Where is the LM317?
You meant LM431?
HAVE YOU CHECKED THE CURRENT DELIVERY CAPABILITIES?
If so, please repeat that for us. Thanks!
Sorry for wrong ic number, that is tl 431.
@@TARIQLAB TL431CP. ;)
Exactly
Good
I did the circuit, indicator light of the unit flashes, as the out put keeps swinging from zeeo to 6 v, what did i do wrong!
Ok
BONJOUR svp premièrement 1 je veut avoir un convertisseur de dc vers ac 12V DC to AC variable ( 3V 12V 24V au 30V AC) .
2 SVP je veut encor pour fabriquer un variable de AC to AC AC 220 V vers AC de 3V AC a 30V AC //// merci beaucoup
chemachema
What is the value of the resistor?
330 Ohm
ممتاز
Pls our the components used
Disple kase lagaye
Power direct aor reading wire output pe lagana
Dc volt miter lagaya hota to bahut achha hota bhai
Sahi bataya ap ne, aik dosry video main laga hai
❤❤❤❤ Please Sir New Video Banain Is Ka
Thee hai
Sir 32 volt ko 48 volt karna hy
Adapter hai, ?
@@TARIQLAB sir ji printar ki Powrsuplly hy
Can i use 500k potentiometer
Yes, may slow response
What is main ic number?
Which one
@@TARIQLAB smps controller
Cannot be done with 'name brand' eg: Asus, Compaq or HP. And exceedingly dangerous.
Possible with those models having TL431, have to replace output filter capacitor 50v
@@TARIQLAB You can't get into them. Sealed units. Almost have to destroy them to get them apart.
@@rodjackson9652 bro put some petrol keep in a box then try to open ☺️
ke hale tum tike ...
Fluke 787B 😮😮😮😮😮😮
اتمنى الترجمة للعربية
Elvis Chennai
Welcome
الکاسب حبیب اللہ
Salam tariff bhai apka no mil sakta hai
Channel description main WhatsApp
hello i need to make a bench power supply 0.6 volt to 30volt can i use a laptop charger any one got a diagram
In english please
Is it possible to translate it in Arabic so that we can benefit from it, please and thank you

Dc moter jal jayega 😂😂😂35 volt
Kam kar sakty hai na
Tariq bhaie aap apna contact number daygy yea WhatsApp no
Channel description main hai
Thanks. Pls list the items used