How to test a transistor and diode.
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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.
Пікірлер: 442
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
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.
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.
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!
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!!
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
I watched a lot of videos and almost i never left a comment, this video deserves one...excellent
Thanks for your feedback and support. Cheers, Martin.
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.
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
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.
This is the most thorough video I've seen on KZread 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!
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!
First thank you for the video it was very informative. Second PLEASE continue your vids on basic components....Your an excellent teacher. thank you.
Brilliant videos,I,ve looked at loads of videos on basic electronics but none come close to yours, thanks again.
You just pour everything out in this vid. Thanks man.
My pleasure, thanks very much for the feedback.
A simple thanks for all the time and effort you put into making these marvelous informative videos.
im a college student,it is a really helpful to understand the pnp and npn transistor.
No doubt the BEST video on KZread on how to test transistors, WELL DONE!
From Iraq-Kurdistan............1000 thanks to you for your Efforts to serve your brothers of humanity
@mjlorton
9 жыл бұрын
faik hawrami My pleasure, thanks for the feedback.
@SDsailor7
9 жыл бұрын
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 жыл бұрын
+mjlorton hi bro can u tell me which handle scope is good for testing cars sensor or ignition coil thx
Visual inspection is the key. Keep up the good work mate.
I removed the transistor from the circuit and it tested fine. Thanks!
Just what I need to know for an upcoming interview...thanks for making it so easy to follow!
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.
Thank you. I've been watching many videos on transistors but this one is by far one of the best.
Hi Sammy, thanks for the great feedback. If you visit my Amazon store through my link you can then purchase anything...even items not listed. The Transistor tutorial will be one of the next electronics tutorials I do. Cheers, Martin.
Excellent presentation, I always enjoy your videos, easy to follow and understand.
Thanks for the video. I am always learning something from each of your videos.
Very Step By Step Informative... Thank you for sharing and explaining the basic lesson
Thanks very much for your feedback Asiel, it certainly is appreciated. Cheers, Martin.
Thank you sir, this is really brief and simple to understand. Thumbs up for you
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.
Fantastic, cleared up so many little questions for me in one very clear tutorial, thank you very much for your time and effort.
Thanks for the video. It's been awhile a video has not been explained so beautiful
Great tutorial, great pace and really well explained. Thank you very much.
Very good question. Yes the fuse was tested...but it's the "logic" on the multimeter that seems to be at fault.
Thats also a good way of identifing the collector, base and emitter of an unknown transistor. Thanks helped lots.
Brilliant! I certainly appreciate your post and feedback. Cheers, Martin.
Thanks for the video, your a great teacher, you explain things very well.
Watched again and I would really like to see more of your 'How To' Videos. Thanks
Happy to find your channel. Thanks.
That was very well put over, glad I check you out.. I learned a lot. Thanks for sharing.
thank you very much for taking the time to make this video.
Thank you for sharing your knowledge, it was very helpful.
Great video. Cheers on keeping the knowledge alive and passing it to the new generation.
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.
Outstanding...without getting into "doping theories" blah, blah, blah...this really shows one how to test component level transitors....nice video Aye!!
Excellent tutorial and explanation.
thank u for this info.very valuable.school wont teach u as good as u did in 20 min.
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.
i like this kind of practical and very useful videos. thank you.
Thanks for the feedback Paul.
Excellent tutorial! Thanks for sharing.
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
Nice video, easy to understand. Thank you
Excellent tutorial. Well done!
New into electronics. So informative. Thanks for your effort.
Excellent tutorial. very nice explanation, thanks for sharing !
Thanks for your excellent explanations! Really helping me in learning....
Thank you. This is your best video yet !!!
you have clear my transistor concept. which i was hanging from long time.
Thanks very much for a great tutorial. Seriously learnt a lot.
Excellent explanation! Thanks.
Thanks, really useful and easy to understand.
Very nicely done. Explained very well
Thanks very much for the feedback.
Fantastic video! Very easily explained & simple to follow. Thanks for the lesson👍🏻
Thank you. I'm troubleshooting now and this helped tremendously.
Simple explanation , and very useful , thanks a lot.
Martin, Very nice educational series. Thank you....
very good clear information Thanks
Awesome Explanation Thanks for educating me about trans and diode
Excellent video. Thank you.
thank you for sharing this...a big help for me.
You are a good teacher. thanks
Brilliant well explained enjoyable and precise many thanks
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
2 жыл бұрын
instablaster.
brilliant vid, your one of my favourites, keep the vids up, thank you.
very clear explanation. BRAVO!!!
You don't even know how much I learned from this :)
@mjlorton
10 жыл бұрын
Good to know...thanks for the feedback.
thank you for your very clear explanation. More power
really real helpful information and procedures. keep it up.cleared a lot and lots of things for me. thanks for this video.
Beautiful i really loved your video, i am noob in electronics but this tutorial was one of the best explanations of transistor and diode.
Thank you. very good explanation.
Great video. very helpful to this beginner.
Tthanks for the feedback.
It seems you are a very good teacher, excellent piece of work ....
Thanks, I appreciate the feedback.
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.
Great. Simply super explanation. Short,simple & sharp make everyone understand clearly. Keep share more tips thru web mjlorton.Thank you
Very good!! I enjoyed this Excellent video. I will watch for more of your videos .Thank's
Clear! From many tutorials a like this one the best. Good job
Nice video learned a lot thanks for sharing
Thanks very much for your feedback Rich. I do touch on potentiometers briefly in "Electronics Tutorial #5 - Ohm's Law Pt 2 - Application:LED Resisitor, Voltage Divider, Current Shunt" I will be covering more on individual components in future tutorials. Cheers, Martin.
excellent...Very helpful to my basic knowledge about electronic devices
Great tips.I really enjoy watched your video clip simply super short,simple & sharp.Hope to see more tips.Thank you very much sir..
Thank you for the great explanation.
good material..thanks so much sir!
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!