How to test a transistor and diode.

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Visit my website for more Tips, Videos, DIY projects and more:
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I demonstrate how to test a diode and transistor (NPN and PNP) to assist with trouble shooting / fault finding an electronic circuit board.
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This is a video tutorial on how to test an NPN and PNP transistor.
* Fluke 115 digital multimeter with diode test.
* Electronic diagram and symbols of PNP, PNP transistors and diode.
* How to fix a circuit board.
* S8050 NPN transistor, C639 NPN transistor, C640 PNP transistor
* forward bias 0.3 volt to 0.8 volt, reverse bias open circuit OL on multimeter.

Опубликовано:

4 авг 2024

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Комментарии : 442

@matthewwayteck 10 лет назад

I watched a ton of videos and never left a comment, this video deserves one...excellent description I now understand and you saved me $200

@robertmcmanis4974 3 года назад

I have watched a lot on videos and still con not tell a good component from bad. You have truly cleared my head and love your videos period!

@mystarstudios 7 лет назад

This is the most thorough video I've seen on RU-vid in demonstrating how to measure a transistor. I am an extreme novice currently in the process of trouble-shooting a PCB and this was so helpful in clarifying the process. Thank you!

@merlin5476 11 лет назад

for many years i have been playing with electronics (see "merlins theremin" on you tube) but never knew how to do a simple transistor test. Excellent video mate. cheers.

@bakgatfromgb 11 лет назад

Hi there fellow South African, all I can say is that you have done a sterling presentation Well done! Have subscribed to your tutorials Thank you and totsiens!!

@TheDrjodi 12 лет назад

now i can finally test transistors. ive seen other videos on testing them but im useless if i don't understand how it works. gained alot from this one. good job.

@danielrice5474 9 лет назад

I tested my Diode, Transistor (PNP/NPN) in my radio kit using this video. All worked exactly as it did on your test. I found it easier however to put the transistor into the breadboard and connect a wire from each lead of the transistor to one end of an LED terminal. I used the top springs for a PNP and bottom springs for a NPN which made it easy to see how they both worked the same, yet in reverse current of each other. Thanks for this video.

@leaf4550941 11 лет назад

I really enjoying your videos. My questions are written below. 1. Why we use a resister with collector for NPN- transiter and how can we select its value? 2. If I use NPN- transister then why the capacitor and diode are advisable to use in parallel, connecting emitter and collector, and how can we select T, D and C values? 3. How can we select a transister ? 4. How to stop the harmful frequencies effect on a simple circuit of multiple transistors?? Please answer all the questions, thanks!

@jorgewashington2981 9 лет назад

A simple thanks for all the time and effort you put into making these marvelous informative videos.

@SmithAVproductions 9 лет назад

No doubt the BEST video on RU-vid on how to test transistors, WELL DONE!

@mikemurphy5336 8 лет назад

finally very clear , i was always in the dark with the arrow and line and never took the effort to fully solve the ambiguity of the diode icon or direction of current paths this for me was about 30 years of diode icon darkness best video yet on this to clarify this thanks and its easier for me to learn with these vids than actual highschool

@Kurse77 11 лет назад

Agreed, top notch vid. I've been doing board level repairs and diag in the electronics field for 15yrs, you are one of the very few people who actually know what they are doing.

@janderks8038 10 лет назад

I watched a lot of videos and almost i never left a comment, this video deserves one...excellent

@YuddaLevy 12 лет назад

First thank you for the video it was very informative. Second PLEASE continue your vids on basic components....Your an excellent teacher. thank you.

@DenBlackburn 10 лет назад

Fantastic, cleared up so many little questions for me in one very clear tutorial, thank you very much for your time and effort.

@faikhawrami 9 лет назад

From Iraq-Kurdistan............1000 thanks to you for your Efforts to serve your brothers of humanity

@mjlorton 9 лет назад

faik hawrami My pleasure, thanks for the feedback.

@SDsailor7 9 лет назад

mjlorton Great video! very interesting hope you can make a video in the future on how a transistor works.Just subscribed to your channel.

@sara78130 8 лет назад

+mjlorton hi bro can u tell me which handle scope is good for testing cars sensor or ignition coil thx

@Ironwarpigg 10 лет назад

Great video. Cheers on keeping the knowledge alive and passing it to the new generation.

@johncunningham5435 9 лет назад

Excellent presentation, I always enjoy your videos, easy to follow and understand.

@fboo3232 9 лет назад

Watched again and I would really like to see more of your 'How To' Videos. Thanks

@joshuadenmark 10 лет назад

Thanks for your post, I really appreciate all the hard work you put into sharing your knowledge with us. Have a nice day, and keep up the good job.

@Shutterbug13856 12 лет назад

Hello Martin, These videos are AMAZING for "newbies" to Ham Radio and electronics!!! People tell me, "just put the red probe on this and the the black one on that and put the dial here and this is what you should get." That's fine, but you show is HOW this all works, especially your paper drawings and how you put the test probes on those spots--GENIUS!! Thank you, Thank you. I will now look through the videos to see if you have one on Potentiometers; if not can you make one? 73, Rich, W2RRK

@SherrysVloggin 8 лет назад

Fantastic video! Very easily explained & simple to follow. Thanks for the lesson👍🏻

@RanMan171 11 лет назад

Thank you. I've been watching many videos on transistors but this one is by far one of the best.

@sharfazhameed6382 3 года назад

Visual inspection is the key. Keep up the good work mate.

@fariqrashid898 3 года назад

You just pour everything out in this vid. Thanks man.

@muneerhataf 10 лет назад

you have clear my transistor concept. which i was hanging from long time.

@howardstanley3935 11 лет назад

Brilliant videos,I,ve looked at loads of videos on basic electronics but none come close to yours, thanks again.

@stevenmiller4442 10 лет назад

Nice video indeed! Thanks M8, been working on trying to breath life back into my old 10 meter Ham tube amp, found the PNP transistor looks like it got hot at some point in time. I studied and followed your video and applied the concept which I am having a reading of 0.002V between the emitter and the base, next step is removing it then try to see if I can't get some written info off it using magnifying glass. 73 from Steve, KC3AZT.

@elecnut8211 7 лет назад

Thank you. This is your best video yet !!!

@Americanstu 11 лет назад

Just what I need to know for an upcoming interview...thanks for making it so easy to follow!

@QAhkam 7 лет назад

Excellent tutorial. very nice explanation, thanks for sharing !

@Rajapervaz 8 лет назад

I just saw your video and i am very impressed from your detailed explanations, as I am very interested in Electronics i'll surely be watching & learning from more of your videos if available. you are doing a wonderful job, please keep it up & thank you.

@mikedevita5558 3 года назад

Thank you. I'm troubleshooting now and this helped tremendously.

@LalitKumar-gw2gn 10 лет назад

sir, i am watching your videos since long and under stand it. i like your way of instruction. Tks

@scin3759 9 лет назад

Happy to find your channel. Thanks.

@drbonkie 9 лет назад

Clear! From many tutorials a like this one the best. Good job

@vernoncastle8983 8 лет назад

Vernon Castle .................... This was the simplest demo of testing a xsistor i have ever seen. just great look forward to more demo's Thanks bro.

@boualemmerkati1233 8 лет назад

It was very clear and thanks for posting such videos. Boualem from Algeria

@awangheathcliff4912 11 лет назад

Thank you sir, this is really brief and simple to understand. Thumbs up for you

@StevenIlnar 9 лет назад

Thank you for this video, it really helped. I have watched many other videos how to check transistors, but yours explained everything. I liked the way you explained the transistor by representing it as two diodes. And thanks for mentioning that pinout may be different in different transistors, i thought base is always in the middle)))

@zyairelian8560 3 года назад

instablaster.

@barryg41 12 лет назад

Thanks for the video. I am always learning something from each of your videos.

@MrLibbyloulou 9 лет назад

brilliant vid, your one of my favourites, keep the vids up, thank you.

@monkmsm 10 лет назад

Thats also a good way of identifing the collector, base and emitter of an unknown transistor. Thanks helped lots.

@brendanprice8787 4 года назад

Great videos keep up the great work, I always enjoy them. I believe the OL is open line.

@Ronavargas 8 лет назад

Excellent tutorial! Thanks for sharing.

@peterjansen5498 5 лет назад

Great video as always. Not wanting to split hairs, but they are not so much circuit diagrams of transistors as schematic symbols. In themselves they don't form a circuit. Love watching your videos, no matter how long you work with electronics there is always something new to learn or a forgotten detail to be refreshed.

@mjlorton 12 лет назад

Thanks for your feedback and support. Cheers, Martin.

@LAU3768 5 лет назад

Awesome Explanation Thanks for educating me about trans and diode

@mrhandsom34 11 лет назад

Thanks for the video. It's been awhile a video has not been explained so beautiful

@krisztianszirtes5414 10 лет назад

You don't even know how much I learned from this :)

@mjlorton 10 лет назад

Good to know...thanks for the feedback.

@neil8288 6 лет назад

Thanks for your excellent explanations! Really helping me in learning....

@jtamad44 9 лет назад

Thanks you very much for this video, you really helping a lot of people who wants to learn.Keep up the great job. GOD Bless you always.

@smash7777- 7 лет назад

Awesome video! I'm just starting out so prob be a while before I need any of this. It was explained in a very easy to understand and remember way. I'll be checking out your other vids for sure....thanks!

@pillow62 11 лет назад

Very Step By Step Informative... Thank you for sharing and explaining the basic lesson

@onghalamwenyo 11 лет назад

thank you very much for taking the time to make this video.

@MrAcogan 11 лет назад

Great tutorial, great pace and really well explained. Thank you very much.

@surak24 10 лет назад

thank you for your very clear explanation. More power

@w.rustylane5650 6 лет назад

Kudos for the video tutorial. I actually learned something.

@extendedp1 12 лет назад

Thanks for the video, your a great teacher, you explain things very well.

@leontalkdaliy5894 4 года назад

im watching you now in 2020 and your inforamtion still Amazing and useful thank you very much :)

@raywurst2868 10 лет назад

man u explain things so easy been wanting to know how to test them and never could understand how i would even buy a cd its that easy i wont remember it long because i had two stroks but ill just come back right here

@Trevorjhk 9 лет назад

Brilliant well explained enjoyable and precise many thanks

@AlQazaz 8 лет назад

Thank you for the great explanation.

@vk2acm 8 лет назад

Excellent tutorial and explanation.

@oldstyleanalog6459 9 лет назад

thank u for this info.very valuable.school wont teach u as good as u did in 20 min.

@NJxD519 11 лет назад

It seems you are a very good teacher, excellent piece of work ....

@gugutm 11 лет назад

Beautiful i really loved your video, i am noob in electronics but this tutorial was one of the best explanations of transistor and diode.

@jamfire100 11 лет назад

That was very well put over, glad I check you out.. I learned a lot. Thanks for sharing.

@sls81351 7 лет назад

Excellent tutorial. Well done!

@muruvel135 11 лет назад

Great. Simply super explanation. Short,simple & sharp make everyone understand clearly. Keep share more tips thru web mjlorton.Thank you

@minthiha9829 10 лет назад

Thanks, you show very clear in video.

@jeffersonpasco6653 8 лет назад

very clear explanation. BRAVO!!!

@frankfromupstateny3796 10 лет назад

Outstanding...without getting into "doping theories" blah, blah, blah...this really shows one how to test component level transitors....nice video Aye!!

@mjlorton 12 лет назад

My pleasure. The explanation of how a transistor works will be part of the current electronics tutorials I'm doing...so stayed tuned over the next few weeks. Cheers, Martin.

@mjlorton 10 лет назад

Brilliant! I certainly appreciate your post and feedback. Cheers, Martin.

@vtssdude 11 лет назад

Thank you for sharing your knowledge, it was very helpful.

@samsaffari5800 11 лет назад

Simple explanation , and very useful , thanks a lot.

@linkenmk 11 лет назад

New into electronics. So informative. Thanks for your effort.

@peterregmi3708 11 лет назад

im a college student,it is a really helpful to understand the pnp and npn transistor.

@MrRobertSult 10 лет назад

Very nicely done. Explained very well

@kimcellosolo 10 лет назад

Excellent explanation! Thanks.

@Tosh27 11 лет назад

easily explained and put in a way even us newbies to electronics can understand. spot on mate thank you.

@aidenang4763 9 лет назад

very clear explanation ..thank a lot for this tutorial

@burmahero1 9 лет назад

please increase the video quality from 720p hd to 1080p hd so that viewers can download them and keep them as reference in the future.We find your videos very helpful.

@pcuser80 12 лет назад

Martin, Very nice educational series. Thank you....

@corby404 11 лет назад

Nice video, easy to understand. Thank you

@mjlorton 11 лет назад

Very good question. Yes the fuse was tested...but it's the "logic" on the multimeter that seems to be at fault.

@race5050R1 11 лет назад

I removed the transistor from the circuit and it tested fine. Thanks!

@simplexdual2010 11 лет назад

i like this kind of practical and very useful videos. thank you.

@jhawri 11 лет назад

Thanks, really useful and easy to understand.

@rizwanbuhardeen 10 лет назад

Thank you very much for clearing transistor misunderstand and doubt

@younusmalik9843 10 лет назад

Very nice, teaching method and materials perfact

@mickyhearts100 11 лет назад

Thanks very much for a great tutorial. Seriously learnt a lot.

@mahmir5563 11 лет назад

You are a good teacher. thanks

@OKBAOK 10 лет назад

Thanks for educating me about trans and diode :) nice video keep them coming :)

@mjlorton 10 лет назад

My pleasure, thanks for the feedback.

@andybowen5814 10 лет назад

very good clear information Thanks

@topikhan371 8 лет назад

Really useful, thanks alot! Keep it up!

@Nessaritius 9 лет назад

It would be great if you post a video on how transistor works. It might be easy to unerstand how the FET type transistor works, but for me NPN and PNP (BJT) still pose a challenge. :)

@JoshBrownPhotography 11 лет назад

Very good tutorial. I like how you keep repeating the important stuff, it helps me retain the information. You're also better than the majority with your closeup camera work. I'd love to see some techniques on figuring out the pinout without a datasheet. You did a fantastic job on this video. The music volume at the end is a little loud, but great video.

@mjlorton 12 лет назад

Great, thanks for the feedback. I'll certainly continue these videos on basic components as I certainly learn through the process as well. Cheers, Martin.