Brilliant simple to understand presentation. The presenter quickly comes to the point and walks you through the process without wasting any time. A very good gifted teacher indeed!! The minute I finished watching the video I quickly clicked on the "Like" and "Subscribe" button.

I like how you trained us ,you are a good teacher . I understand firmly

@TechStudyCell

4 жыл бұрын

Thanks for your feedback sir 👍

@jeanlouisbeniere816

2 жыл бұрын

8d)d-)?d-,s9-9e9ekdk:e)39e)e8)8:jekkske

Just had a mosfet problem... perfect test solved all questions. thank you!

Thank you for the excellent explanation of how to quickly and easily understand how the MOSFET works and how to test it.

Hello my friend I have a question for you when you have only voltage between Gate and the Drain and you test the continuity between source and drain without voltage ! does it beep ?

Can I test the transistors 2SK2221 G/S/D when they are still in the amp unpowered of course? They all test 375/1750. Guessing the caps are blown.

Bro, you did great!!! Straight to the point..and no grammers!!! The explanation on the design of the MOSFET is superb!!!

Very nice presntation - clearly explained and nicely demonstrated. Probably worth pointing out that the negative lead of some multimeters (particualrly the older analogue meters) have the black lead connected to the POSITIVE of the internal batttery. Also this will only work if the diode test position give a positive voltage of at least 5 V (normally - some may require a higher voltage)

@jeanlouisbeniere816

2 жыл бұрын

´s8´zke8k3s

In your test circuit,can't see how you get a negative reading on your DVM. +ve terminal of DVM is connected to G terminal of Fet (10kpot wiper).If pot set to bottom . Wouldn't it read 0 volts and then only go +ve as pot is increased?

@980ssbbearcat2

Жыл бұрын

You are absolutely right.

Excellent explanation & practical demonstration - cleared many basic doubts - keep making such informative videos - thanks

@TechStudyCell

4 жыл бұрын

You are welcome

Good , well explained . Thanks for sharing. Please keep up uploading electronics related videos.

sir if i set multimeter into ohm example X1 or X10 then test the negative pin to source and positive pin to drain are they the same result in diode setting? pls. reply thanks

Thanks for a good description, looking forward to many such videos

@TechStudyCell

5 жыл бұрын

Thanks for the feedback...

Ur demonstration ever ever very usful, and practical &theoritical big thanks

@TechStudyCell

4 жыл бұрын

Thanks

awesome technique, never in my mind before. thanks for share!

@TechStudyCell

6 жыл бұрын

You r welcome

Thank you for your time making this informative video, I am repairing inverter now, this video help me understand the use and how this work.

hello if mosfet measures a reading of 707 in on state is this normal. you reading shows 004

I have 6 pins on my laptop mosfet..do they run parrallel to the other side?

I will run some tests but here is my question to confirm my results. by reducing gate voltage you reduce current from drain to source, does this reduce voltage from drain to source also? I assume not. I'm excited to apply these MOSFETs to my project to eliminate bulky relays and have a safe circuit by limiting current. Way cool! I'm still trying to find the most reliable way to have dedicated 6v current to one circuit and 12v current to the other circuit from the same 12v supply. Any advice would be appreciated.

I am trying to test a MOSFET using this method. In the ON state, the drain and source show continuity for a very brief duration, like half a second, and then opens again. I am not sure if this MOSFET is faulty of not. Any advise please.

Excellent video, very well put together by you. Easy to understand with the schematic and the two meters showing the operation of the MOSFET.

Well done ! Provided one is grounded properly, preferably with an anti ESD wrap. Some of these MOS devices get zapped pretty quickly otherwise !

@TechStudyCell

5 жыл бұрын

Thanks 😊

@rsattahip

5 жыл бұрын

You've never been to India, there's so much humidity there static electricity is not a problem.

@leegenix

4 жыл бұрын

@@rsattahip When I accidentally discharged the lead on my failed Motor scooter control unit, I got a large spark. Those Mosfets can store a charge for a long time and more than once. I would short them with a 1,000 Ohm resistor just in case from now on.

Good video for basic testing. Can you show how to test the maximum current of the mosfet, as per data sheet?

Good video but I have a question, I have a clamp meter 266FT with no diode test mode but it has ohm test labeled 2M, 20K and continuity test labeled 200. Can I use it to test Transistors? Or I should purchase another multimeter

What if after putting a +charge of the mosfet but there is still no continuity.. is it a bad mosfet already?

How IRF1404 is it the same test? Thank you

Can I check lm 317t in the same way?

hi from one newbie. i want to test the item sg60n03p. what should i expect in first and second direction on D S? i see diode between D and S

In testing/checking MOSFETs using Multi-meter, when the gate is charged, why some MOSFETs (N-channel & P-channel), the drain to source let us say 0.002 or less, others starts with more higher like 0.435 and running up as fast as a second or half a second until showing infinite? What does it mean? Does all MOSFETs behave like that?

great demo and explanation the best i have seen please do more

@TechStudyCell

6 жыл бұрын

+PBS #007 Thanks

@xnatstudio256

6 жыл бұрын

kzread.info/dash/bejne/dXiYlq6aZaesqJc.html

@michaelrobert4094

4 жыл бұрын

I agree it was very clear and easy to understand, thank you @tech studycell

What is the drain to source voltage and current in on state when 10 volts is given to gate and source terminal

Do you know were I can get tubes for a texas star liner ?

Nicely done! I got more out of your 3 minute video than 1 hour of reading. I am going to use your test circuit to match mosfets. So simple! For a given input I can swap mosfets and compare their output. For P channel mosfets I can reverse the polarity. I want to balance them for audio output devices. Thank you!

@TechStudyCell

3 жыл бұрын

Glad it was helpful!

Helped me to get my brain going again on fets. Im busy to do fault finding on small invertor so now i can make sure wheter my fets are ok or not. Thx for video

Thank you very much for this fine video. It helped me diagnose 2 out of 4 BS170 MOSFETs bad on my radio.

Thanks for the explanation. Helps a lot. I tried to do the same and got the results as you said. BUT, I tried with two types of AVO meter, one (with 3V supply) could do the test and the other with 9v battery could NOT do the test. The reading showed nothing. Could you please explain why? Thanks .

Estou com uma placa fonte de uma tv quando ligo na serie esta acendendo a lampada

I was wondering if someone could teach like. Look what I found. Thank you very much. Can you please make some videos about mother board chips the same way thank you

Does this test (to check if mosfet is OK) work if it is still in circuit (but no power connected)?

I'm getting continuity from source to drain on brand new LMD150 mosfets. What is going on?

Is it always that multimitere supplies enough to gate to switch it on, or need to supply higher voltage for some

What is the difference between pnp and mosfet transister and what are there voltage capacity

What's the difference between the mosfet health check that I do on my channel and what you do?

This was so helpful. Thank you so much!

@TechStudyCell

4 жыл бұрын

You are welcome

What about mosfets that have the S lead trimmed/not touching pcb?

Im testing a SVF10N60F and it doesn't behave like this, does it mean it doesn't work? or is it a different kind of transistor?

Brand new FET. Out of circuit test failed. In circuit test passed. Is it good? I think so. Why does it not work like you showed in the first test?

very nice and practical video ! can a IRF3710 mosfet replace an FET (SK2543) which has burnt ? thanks !

Great lesson thanks! But please tell me why a 100 ohm resistor is needed in the circuit and how does one determine what size resistor to use?Thanks very much!

@leegenix

4 жыл бұрын

In my electronics class, a 100 Ohm resistor is always used at the Base of a transistor in series with the test lead.

Thank you, super handy information which I've just used to identify a faulty MOSFET.

@TechStudyCell

3 жыл бұрын

Thanks for the feedback

@maxmillangolby

3 жыл бұрын

@@TechStudyCell can u show us P channel also ?

where i find cmp40p03 xz 1412 mosfet

What is the drain to source voltage nd current when 10V is given to gate to source terminal of IRFP250N MOSFET ??...CAN YOU PLEASE TELL THIS

Is it not possible for mosfet to get damaged when touching gate with fingers?

Gud job .. thanku And pls explain the characteristics of Power MOSFET

Cool. I don't suppose there's a way to ID a MOSFET when the numbers are gone is there??

informative. thanks

good video. ive never seen like this video simple and easy. thanks.

@TechStudyCell

4 жыл бұрын

Thanks

Unfortunatly I tried to charge Source-Gate, for a while then checked again Source-Drain, and still no any continuity. Does it mean Mosfet it bad ??

what about 8 pins flat mosfets ? is it the same principle ?

thank you can i do this when mosfit is in board?

My DTU15n10 new mosfets show short circuit. Whats wrong?

Where did you buy IRF832 Transistor?

thanks! make more videos please. It help a lot of people.

@TechStudyCell

6 жыл бұрын

Sure. Thanks for the feedback

Mas sy mau tanya,klo bc640 rusak bs diganti dgn tipe berapa,Krn bc640 sulit didpt dipasaran

how the voltage meter show negative Vgs

What about this type W12NK90Z? they have 2 zeners between gate and source, how i test them?

@TechStudyCell

7 жыл бұрын

+hed190 You have to refer the test circuit given in the data sheet of w12nk90z to test it.

5:32 The voltmeter is displaying -8.21 V. If the meter was connected between gate and source, it is impossible to show such value. The only possible way for the meter to display such value is when the meter is connected between gate and drain.

@johndoggett808

3 жыл бұрын

Yes. The V meter reading goes from -8.24V to +4.86V = 13.1V quite a trick with a 9V battery! The voltmeter is reading between whatever voltage the variable resistor is set to, and the voltage swing between the 100ohm resistor and the MOSFET.

@Blue.star1

3 жыл бұрын

Symmetrical supply, +9 0 -9 he didn't show us the picture , battery is hidden

@johndoggett808

3 жыл бұрын

@@Blue.star1 But there is only one 9v battery in the circuit diagram.

@Blue.star1

3 жыл бұрын

@@johndoggett808 watch carefully the wiring , may be no 2nd 9v batt. is there, how can we get - v unless he connects reverse measuring across somewhere else , he might have connected reverse as mosfet switches at -5 V

@johndoggett808

3 жыл бұрын

@@Blue.star1 I agree with Walkalone. When the MOSFET is off, the Meter’s + terminal is at about 0.8v (the Gate (0.8 = 9v - the 8.2v meter reading)). And the negative voltmeter Terminal is at +9V via the 100ohm resistor. When he turns the gate voltage up to 3.5v (9v-5.5v at 6:06) the MOSFET starts to turn no. After this the negative terminal of the volt meter is on the voltage divider between the 100 ohm resistor, and the partially turned on MOSFET. At 6:13 he turns the gate voltage to its highest value, and the MOSFET is pulling the negative voltmeter terminal down the 0v, and the positive voltmeter terminal is the gate voltage.

Are you sure it isn't the gate and source (not drain) that you need to short in order to turn the mosfet off?

What if the MOSFET is P-channel? How does the testing method change?

nice and clear explanation for beginner level , especially for me. Thanks a lot.

That second MOSFET is shorted?

Fabulous! You're a great teacher. Thank you very much!

@TechStudyCell

2 жыл бұрын

Welcome

Should we take out the mosfet from the board to make it accurate. Tnx

Thanks for the lesson.

@TechStudyCell

4 жыл бұрын

You are welcome

Great tutorial sir. Simple and easy to understand. Thank you!

@TechStudyCell

Жыл бұрын

Thanks

By the way, your handwriting is nice and very neat!

@TechStudyCell

4 жыл бұрын

Thanks

thank you, how to find which leg is gate, which leg is drain or which leg is source? are they constant in all mosfets?

@TechStudyCell

7 жыл бұрын

No, they are not constant for all MOSFETs [for example mpf102 have different sequence]. It's better to refer the datasheet of that MOSFET to identify it's Gate, Drain & Source. But most of the MOSFETs have the sequence as I have shown in the video.

You are a great teacher my friend! Thank you

@TechStudyCell

2 жыл бұрын

You are welcome

thank you sir, but you should explain in some circuit the source & drain are maked I & 0. also some mosfet have no numbers to identify. anyway good video, i subscribe :)

@bathurudeendeen353

6 жыл бұрын

Kas S ssunnwe

nicely explained.

Thank you master for the lesson

Love your tutorial. Do you have a video for the PNP mosfet?

@TechStudyCell

Ай бұрын

Not yet!

How u will get negative voltage in gate terminal by using a 9vdc battery?

@Blue.star1

3 жыл бұрын

He used 2 batteries +9 0 -9 , you can find in the bread board 2 wires going to some where else , he didn't mention it or his understanding with symmetrical supply is not there

Very well explained. Thank you.

@TechStudyCell

5 жыл бұрын

Thanks for the feedback.

What is the alternative (top223yn)

You nailed it brother. I also have new understanding

Does the mosfet must be taken out of the pcb? Or can I test the mosfet while the mosfet is still connected to the pcb?

@TechStudyCell

2 жыл бұрын

taken out from the pcb recommended.

WOW thank you This was perfect and very clear video!!! Love it! Thanks

@TechStudyCell

3 жыл бұрын

Glad it helped

Excelent, it helped me a lot!

@TechStudyCell

6 жыл бұрын

Thanks for the feedback...

Hello, good but it seems the voltmeter connections are reversed from the schematic at 5:10

thanks for your help friend, this is exactly what i needed to know...Creator bless...doug (canada)

Yes dear, you can have a thumbs up 👍.!! Simple, clear neat without any doubts 🤗👌

Very good video..simple,easy to understand...

@TechStudyCell

5 жыл бұрын

Thanks for the feedback...

Can you test them in a circuit? Or only out?

great tut

Not Complicated Explanation,so i can understand Easily,Keep in going

Thats a real good trick! Thanks for sharing!

Excellent video for checking the mosfets. I am diagnosing a Samsung tv power supply board. Great help. Thanks again.

@TechStudyCell

2 жыл бұрын

Glad it helped

Hi, thanks, but.... Beats me how you can get a negative reading on your voltmeter in the testcircuit, as minus lead is connected to lowestvoltage=minus pole of battery

@leegenix

4 жыл бұрын

Digital multimeters can show Negative and Positive voltages. That is not possible on an Analog meter unless it has a Zero center on the scale and special made.

@kawkvulcan500

3 жыл бұрын

I agree. Negative to negative and the pos probe is on the sweeper of the pot. It should read zero or some positive voltage. I'll have to set this up and see what gives....

Thank you man for make me understand

@TechStudyCell

5 жыл бұрын

You are welcome.

@leegenix

4 жыл бұрын

@@TechStudyCell Thank you too. I have a better understanding of them thanks to your lecture, clean drawings, and good slow speaking voice.