How they work and how we can test a Laptop Mosfet
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- Опубліковано 15 вер 2024
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University level lesson/teaching that I'll never forget. Yet down to earth, well explained and examples given, in less than 13 minutes. REALLY good video. Thank you Sorin!!
I like the direct explanation, I remember sitting in a class many years ago listening to a lecturer droning on 1.5 hours on this subject, we all left wondering what he was trying to say. my boss explained it like this direct as Sorin has, perfect
I don't understand how the gate opened when you touched it with tweezers? What was the gate detecting when you did that?
utopiaopera the gate was detecting an intruder. 😀 Just kidding. Even I'm curious. 👍
Ray of Creation I believe the gate was sensing a slight resistance either thru your body or a direct touch with the tweezers.
I never tought about learning electronics with Travolta!! Awesome channel!
I'm a little late to getting to this video but very valuable knowledge with these mosfets. Thank you so much once again Sorin!
My knowledge increased about mosfet. Thank u sir.
Great explanation! finally a Mosfet understanding made really easy.
Thanks...for an clear explanation how mosfets work with practical approach...Good keep it up we enjoy ur videos.
Thank you
Bravo Sorin. Mulțumesc frumos.
Sorry, but I sometimes forget to put the thumb UP after watchin your videos, because I quickly go to the next one :). You are fantastic peson. Thank you for sharing you knowledge. All you videos are great and always deserve for THUMB UP!
I love this guy.
You know, he's like your favourite teacher back at school.
Well, he is for me anyway.
Keep up the great work.
You should start selling merch such as T-shirts, baseball caps and such.
I would willingly buy anything with your name on.
Would identify me with the other likewise nerds, no offence!
Until then, Patreon here I come!..
>
Fantastic explanation and demo 👏
Tnx for your time and your videos!
Youre doing a great job, I learned a lot from you. Thanks!
Very good demonstration
Thank you for sharing your knowledge with us !!
best teacher. si we need more vedios from you to repair laptops perfectly with out schematic diagrams. help us
This was a great and quick explanation, you had the parts already connected and working so you just proceeded with the details, thank you very much Sorin
Simple but effective. Very useful video. What will happen if we switch the plus and the minus. The circuit will close again but will the led blink.
if you switch, will be short because of the diode
last silly question. If we switch the polarity and use PNP instead of NPN. The diode is in opposite direction.
Great explanation! Thanks
Nice one Sorin, thanks for the time you put in
His name's Sorin?
Yes, his name is Sorin.
sir your all video is good
Thank you for explaining
Thanks for the effort teaching these things......great job!... :)
Great video once again.
I have a request, if you have time: Could you fix a laptop but using schematics so we can understand how we can read schematics?
Or at least explain us an schematic of a random laptop, and how things are related to themselves.
Not all PCB designs are the same my friend :) and understanding schematics is also important.
Please teach how to use analog multimeter to test any faulty component in a motherboard
Thanks for explaining Mosfet.
that makes perfect sense, Now i understand mosfat
Very usefull video. Thanks!
Great to understand mosfet working thanks.
thank you Sorin! your a good teacher!
THANK'S SORIN YOU'RE GREAT
that's the best like/dislike ratio I've seen in a long time. 200 thumbs up 0 thumbs down. No stupid people here.......Thanks for sharing your knowledge. Hope your back is better...
Thank you very much, great explanation.
Hi Sorin or should I say Master Sorin? Thank for posting all these videos.
I am one of your subscribers and really enjoy the content of your videos.
It may seem a bit of a silly question, but in your opinion, is it worth learning how to repair computers and laptops?
A friend of mine thinks it’s not worth it nowadays, because there are a lot of people doing it, including young teenagers and people want it done for next to nothing.
I love learning new skills of all kinds. I am at the moment learning how to repair car ECUs and thought that if could also learn to repair other electronic devices, such as computers and maybe mobile phones, it could be useful and profitable.
I live in the UK.
What is your opinion on this?
Many thanks.
Kind regards, Joe.
Ha, ha, ... if you are living in uk, yeah, learn. You know how is with what you said 'because there are a lot of people doing it, including young teenagers and people want it done for next to nothing.' ? Well, is the same as with the phones repair.... 99.9% of the shops are repairing phones but only replacing parts like screen, battery etc. Same with the laptops. The shop owner are looking for to hire someone doing repairs based on electronics knowledge from over 7 years and he could't find anyone. I'm the only one doing this. So, it is worth learning? I will say yes
Thank you for your reply. I originally trained as a car mechanic, but left the trade in the middle nineties. I came back to the trade a few years ago and have been relearning all the new skills that go with diagnosing the electronic faults by proper methods, not just replacing parts to see if it works. I love all sorts of knowledge and love learning new things every day. You’re right, they’re a lot of people out there replacing parts and they actually believe they’re techs.
I’m going to make sure I learn all I can about electronics, not only because it will be useful, but also because I love it.
Thank you for your advice and please continue posting your great informative videos.
Thank you very much.
Kind regards, Joe.
@@electronicsrepairschool I believe they go for more paid jobs, no? You could land an EE job somewhere too. Knowledge is almost always valuable but not necessarily for the job we think.
Hard to find a doctor to do the job of a nurse at a nurse's salary. That's the trick.
First mosfet is a invertion voltage protection, the second is an adapter presence detector
there is two mosfets shown?
Love this channel 🤟
Thank You sir respect the first time wat i understand the testing mosfets
Thx Sorin.
Thanks for the great work ... bro
Thank you Sir,.. for another knowledge..
good explanation. thank you.
Like always, good video. Thanks. I will be thankful if you make a video how to check start up chip if no visual demage on the chip.
sorin you are doctor of doctors
Very well explained
That's very helpful thanks sir!
thank you sir.
get DCA75 - Atlas DCA Pro Advanced Semiconductor Analyser, no need to guess if something is dead or not! But price is ridiculously high.
I ve liked and admired sir.. U ve gratefully inspired me..
Why do you check the short showing Volts rather than Ohms?
Thank you that was clear and very useful.
Best Teacher!!!
great sir
Nice info
Good day Sorin could you tell me what brand name and model of the multimeter you using please. hope to get a reply as i plan to buy one that will do my work better.
Thank you so much. I learned more from you sir.
nice video sorin! thx
thanks you sir
using mosfets allows the battery to have more life because it uses current instead of extra voltage like transistors that use/ high volts ?
GIVE US SOME SITES WERE WE CAN GET LCD AND LED SCHEMATICS DIAGRAMS SIR
hello my fellow hero!
I think the confusing thing about mosfets is only three connections, G,D,S but multiple pins. In practice, could you simply connect to only one of each pin so Gate, Drain, and Source all have only one connection? Why the multiple pins? Never mind....the video answered my question. :)
yes you could but for example the drain is connected to 4pins to decrease the resistivity that might be a problem for high current (30A in his example, that's a lot to have in a single pin). Same reason why you use 3.5mm for oven instead of 1.5mm for lights in your house.
Some mosfets are very small because they are used as signal switches, not power switches (eg. for power rails in motherboard).
Great sharing mate! Thanks!
this guy is very great....gets stuck right in there so even i can understand
Good experiment
PI EXPLAIN THE LCD SCALAR OR T-CON BOARD IN A SIMPLE WAY THANK YOU
OK sir, but in Laptop theory 19v to drain pin and we expect 19v output on the source pin, to get 19v output on the source pin we need to open the gate , for the N channel mosfet needs more voltage on the Gate than the input voltage to open the channel to source , so how the the touch opening the channel?.. on a laptop it's not possible to open the gate by giving lesser voltage on the gate .. I am confused
Thank you for sharing
Sorin loves Friday & Coca Cola 😁
Thank you Teacher!
thankyou for your tutorial .
dhanyawad sir........
I don't understand how the gate opened when you touched it with tweezers? What was the gate detecting when you did that?
Very good explanation. But I don’t understand why there are 3 source terminals and 4 drain terminals.
they are all connected, to carry power. SO-8 is a common package to use for lots of components.
Keep up the good work
very helpful thanks a lot
That's a potatosfet 😃 thanks for the explanation
Can a bad mosfet make a touch screen on a lipo charger stop responding after a few minutes of use?
what about igbt in d2pak configuration there is no collector! look at STGB19NC60HD datasheet how do you test this kind of insulated mosfet?
Thanks
ive bought a dell xps 17 inch worth 300 for 40 quid. it has a short when charger ia plugged in. ive stripped it down and immediately next to thr power rail from the dc socket there are 2 mosfets. one mosfet gas readings on each side. the other just reads 1 on every pin. does this mean it is the cause of the short?
Is it acceptable to have "a short" signal through the secondary Mosfet's beside "the coil", even when the gate is drained or grounded to close the gate? Are some Mosfet's designed to sound as a short between the two sides of a Mosfet that is not the gate?
Nice work!
it works rather by charge than by voltage. but voltage is g to s voltage.
Thanks sir!!!
Sensitive,
I need a. Certain video on reading the mother board help me with a link from you
hi sir i have lenovo ideapad 100S, i used other charger same voltage,but after 1 week my laptop wont turn on anymore ?
So it's just a switch. Thank you!
Thank you ❤️❤️
hi, you had a video when you draw a power supply , where it is?
how i understand why they act wired. thanks man
Thanks for your lesson, I still have couple questions:
- to close the mosfet you said you just need to touch it, do you have to use something electrically conductive (metal)?
- how is the gate "touched" by other components in the motherboard and how do they stop touching the gate?
- is the mosfet supposed to stay closed in a motherboard after you turn it on or the resistor connected between the gate and the source will uncharge it just after it was charged?
- Are mosfet just supposed to rapidly close and open (buck converter) or they can also be used as relays?
- is the voltage in our body charging the gate or just the tweezers (imagine you are using isolating gloves)?
- the PDF says + - 20 Volts for the gate, what does that mean? Is that a range?
- you said industry is using mosfet over transistors, would it be possible using mosfet in CPUs? Are they already doing it? would that be better?
I'm very curious I know, I hope you or anybody else here in the comment section could take the time to answer.
Let me try: Any that holds a charge can "touch" the mosfet to activate it. The superIO normally sends a signal to the gate 1/0. The gate is normally tied to the source so that it's normally pulled low and will be "off" unless a voltage is added. Yes, they can be used as relays. There's enough area on JUST the tweezers to supply a charge to the gate however typically your body (hair + clothes) help to "self-charge" you as a charged object. I believe you can put upto 20 volts on the gate but probably best to stick to TTL range of ~5V. mosfets & transistors are both semi-conductors. The cpu uses its' own "flavor" of transistors for logic switching. But the term "mosfet" is usually associated with higher current / power side. ie/ the internal semiconductor area of mosfets is HUGE compared to a cpu transistor. ie/ 1 switch vs 100,000,000 switches.
@@jonclement thanks for trying 😁👍
That is why I subscribe on this ...the best
So awesome!!!
Brilliant 👍
Is n mosfet bad if i get 8.5v on source and 14.5v on gate? first mosfet near laptop batteryconn(battery is 8.7v ,charger 12v) when on charger(batt unplugged) gate and source are same(8.5v). Thanks!
Awesome.
Thanks, Sorin - I'm beginning to get it. 2 or 3 more views and I'll have it. |-)
We guess the mosfet is p or n both are similar test to they are good or bad state.
Pull up or down resistor stops the madness :-D