This channel is pure gold to learn basic electronics but without the boring parts, with well prepared episodes and with a logical structure! I can't thank you enough for this!
@jonathansnow5198
2 жыл бұрын
I enjoy how you get right to the info without doing a whole intro with a logo and annoying music. Just a simple logo dancing there as you start. Thank you for that.
@LearnElectronicsRepair
2 жыл бұрын
Cheers 😀
@Infiniti25
2 жыл бұрын
It is time saving I agree, very thoughtful.
@plageran
2 жыл бұрын
no 5 minutes blabbering
@LearnElectronicsRepair
Жыл бұрын
It has been mentioned a few times 🙂
@daverush1091
Жыл бұрын
All I can say is that these are the best electronic repair videos on the internet. Not kidding. You are doing a great job. I plan to watch all of them. Thanks for putting them out there.
@MrTaylorJefferys
2 жыл бұрын
I'm not even going to let the video finish I want to say I've been trying to figure out transition for 10 years this is the first time that I've understood it 100% and it makes perfectly good sense to me now thank you very much
@LearnElectronicsRepair
2 жыл бұрын
You are welcome ,and thank you for such as nice comment. There are many many videos explaining transistors but now I feel like I achieved something 😊
@toneelectronix
2 жыл бұрын
Germanium transistors are still used for guitar fuzz boxes to this day. Usually to get the "vintage tone" some guitarists search for. One thing I noticed also, with the cheap transistor tester, it read 1.1v for voltage drop on the darlington. That could indicate it is reading 2x the voltage drop of each junction inside. Love your videos! Keep them coming! Thank you so much!!
@HairyHu
2 жыл бұрын
@Tone Electronics "Usually to get the "vintage tone...". Well not really. They use them because they have low forward bios voltage 0.2 compared to silicon 0.6. Guitar pickups generate low voltages (the magnetic ones). I think you may be mistake it with tube amplifiers. They have a more mellow "vintage tone" .
@T2D.SteveArcs
Жыл бұрын
@@HairyHu that makes no sense whatever, the transistors are bias into conduction with bias resistors, so the 0.2v/0.6v is mitigated and the AC signal is then coupled in through a capacitor, transistors are current driven devices so it's the gain that's important, silicon transistors have a lot more gain than germanium hence you would need more stages depending on how small a signal you were amplifing I built a non contact probe using silicon transistors that can sniff a audio cable (basically a few mV of leakage) the video is on my channel, the guy is right people still use germanium transistors in pedals etc because they say they sound better (despite them being obsolete, unstable, leaky and very inconsistent electrically ) this instability gives them a more dynamic and expressive character, the also have a lower frequency response than silicon which I suspect causes the retro sound the FX guys speak of
@ianhewitt1858
2 жыл бұрын
Really good explanation and presented very well. Not patronising, but clearly a man who knows his stuff and can convey it to others. Just wish I had come across this sooner. So thanks for taking the time to record this and get it out there. Very much appreciated.
@michelbadawi1
11 ай бұрын
I wanted to take a moment to express my sincere gratitude for the incredible seminar you conducted on semiconductors, transistors, and MOSFETs. Your ability to break down complex concepts in a clear and concise manner within just one hour was truly impressive. Your passion for the subject shone through, making the intricacies of these components comprehensible and engaging. As someone who has struggled to grasp these concepts in the past, I can confidently say that your session has provided me with a newfound understanding that I failed to achieve during my months in university.
@Fanan67
2 жыл бұрын
Excelent video, clear and simple concepts. Learning a lot with your lessons. Thank you for your time.
@Ori-Retro-Gamer
2 жыл бұрын
Really enjoying your instruction, i wish i has youtube and tuition like this back in the 80's when i was studying GCSE electonics.. the kids don't know how lucky they are. Many thanks
@Maxximilian
2 жыл бұрын
The last 7 minutes are golden.
@spelunkerd
2 жыл бұрын
Great review, that was fun. I know you don't like that second tester, but if you added three jumper wires with micro clips, it would give more versatility for different sized transistors.
@Daffydubs
Жыл бұрын
Man you should put these on Spotify! I would listen to these at work everyday.
@Curranproducer
2 жыл бұрын
in the 1st 8 minutes of this video I learned MORE about transistors than I have in 5 years of trying to read about them and comprehend them! thank you!
@LearnElectronicsRepair
2 жыл бұрын
You're welcome 🙂
@steveo44
2 жыл бұрын
These videos are amazing. Thanks for taking the time. Wish I had these at college
@zopilotesky3014
2 жыл бұрын
Very well presented, and definitely the best explanation on the subject I've seen yet. Thanks for sharing.
@MattyEngland
Жыл бұрын
Watched lots of videos about transistors, yours is by far the best. Thank you.
@danielgodlewski9932
Жыл бұрын
Really appreciate every single video of this series. Thank you!!!
@ExtremeBogom
2 жыл бұрын
Many thanks Richard for yet another great tutorial. The diagrams help immensely!
@LearnElectronicsRepair
2 жыл бұрын
You're welcome
@christianmusso629
Жыл бұрын
What a great summary! Loved the explanation of the circuits and the testing on plain paper!!
@hamradioeconomystyle48
Жыл бұрын
WOW, I learned more USEFUL information about transistors in the first 5 minutes of this than any chapter in a text book. Frankly, saying that a transistor can be defined by the following, x+y/%$#@;:×"#-xcf/=???? Means nothing to me. What gem of information you've explained here. Thank you very much
@briankotze57
2 жыл бұрын
Agree with previous comments. Firts time transisors makes sense to me. Appreciate the time and effort.
@LearnElectronicsRepair
2 жыл бұрын
Thank You
@richardredcastle7911
2 жыл бұрын
Keep up the great work on these videos. Well explained and enjoyable to watch.
@bulla8631
Жыл бұрын
this video it the best thank you to the man that made this videos I loved it the ways he teaches it very clear easy to understand it including a diagram I want to watched all his videos he the master of all in electrionic than my teachers back in the 90s
@konturgestalter
2 жыл бұрын
One of the best Transistor videos I have seen
@skanderbenmrad946
2 жыл бұрын
a very good lesson, thank you dear collége
@daz41262010
2 жыл бұрын
reached the end of this series and would like to say thanks for posting this series was amazing and will be book marked and re visited another time :)
@user-rf9me7xm1w
2 жыл бұрын
An excellent presentation, very nostalgic for me as I spent many years teaching on City and Guilds Electronic Servicing courses. But, please use the correct BSI symbols for the basic npn and pnp transistors. Sorry to be pedantic but “if a jobs worth doing”.
@gregpeirce6121
Жыл бұрын
very helpful vid, thank you for your work in making these.
@guitarman_3693
2 жыл бұрын
thanks for the vid, if i might say... its hard for me to see so small drawings. & you had a big mosfet when it was like the other, but when you get to the different one ( pnp) you choose a very small mosfet.. and that is where the lesson is at for me.. im still grateful fir the vid. thank you
@petersmith5199
8 ай бұрын
Thanks for your time. Excellent video.
@JosephFernandes2017
Жыл бұрын
You are an Amazing instructor. Thank you so much.
@tasoscyra2785
2 жыл бұрын
Hi ! I really love the way you explain repairs in your videos .Please could you make a video in topic "everything you need to know about ..." about opamps , how they work etc ? I saw an old video about this component and I didn't fully understand how exactly work . THANK YOU !
@overengineeredinoz7683
2 жыл бұрын
Really learned a lot about diagnosis of transistor faults. Thanks.
@tuloko16
2 жыл бұрын
I’ll have to say, after messing with this stuff for a very long time, i was never able to memorize the whole npn/pnp deal. The way you explained it, finally made it “click” to were i know it by memory.
@dumbluck6180
Жыл бұрын
Very happy I found your channel. Great stuff!
@71pil
2 жыл бұрын
Thank you very much amazing videos thanks for the info MR
@muhammeddanso4436
2 жыл бұрын
Fantastic lecture l have never known much more about transistor b4. Thanks
@monz7951
10 ай бұрын
Thank you very much I learnt a lot. Cheers!
@JoseHernandez-md8tv
2 жыл бұрын
Great tutorial. I wish I had found those years ago. Even that I learned a lot. Please keep going.
@maxplanck698
Жыл бұрын
Very useful video, real info leaving aside the fluff, well done
@spicky2966
2 жыл бұрын
love it just need to watch it about a few times to fully gasp all that information tks nice lecture how you started and ended.......
@paparazzo80
2 жыл бұрын
Loved the video..now I finally know how transistors work....is there a video on how to test MOSFETs on PCB??I wanna learn that, too.
@LearnElectronicsRepair
2 жыл бұрын
AYNTKA Mosfets will be the next video in this series, let's see if i can do a good job on those too 😉
@paparazzo80
2 жыл бұрын
@@LearnElectronicsRepair Loved the video..just learning from pure theory I never could understand how transistors work...you showed us in practice and it was hell a lot easier...
@vinxmod793
Жыл бұрын
Mentioned Germanium Transistors and just used a 'matched pair' of germanium transistors to create the 'Fuzz Face' circuit Guitar EFX pedal
@nazeerabdulrahuman9526
2 жыл бұрын
Thanks for the useful video 🌷
@antonypalmer5804
2 жыл бұрын
Thanks, I did not know that the Emitter gave a slightly higher voltage on the diode test. I normally explain a transistor as being a bit like a tap with the handle being the base but I like your explanation when it comes to a faulty transistor. Good video and a great way for me to refresh my knowledge
@LearnElectronicsRepair
2 жыл бұрын
You are welcome. The reason the emitter has a higher voltage drop is because the two N type silicon layers (in an NPN) transistor have a different amount of doping compared to each other. The same applies with the two P type layers in a PNP transistor. I think this trick of identifying the emitter is something that is hidden in plain sight. You see the small voltage difference every time you test one but you don't think about it's significance. This will very occasionally let you down and you will find some transistors where you can not see a difference B-C and B-E but I never saw one where B-C gives the higher reading.
@mohanadmozayk7651
Ай бұрын
Thank you so much for that information
@petevannuys5642
2 жыл бұрын
Does that work better mostly with some analysis device get more information ?.
@castlecodersltd
2 жыл бұрын
Thanks for this, I was looking forward to it. Some helpful tips in here
@travised
Жыл бұрын
Amazing transistor content
@gameofquantity96
3 ай бұрын
Extremely great channel
@Dinco422
Жыл бұрын
Very informative tyvm
@jeebranahmed9577
Жыл бұрын
Sir Plz Make A Video On All Types Of Transistor With Images And Specification
@seguramlk
2 жыл бұрын
Awesome. Tysm for your videos Sir 👍
@TheClahey
Жыл бұрын
Thanks, Prof.
@fastacker2
Жыл бұрын
That little lever on the cheap component tester opens and closes those little slots. You can also simply use the little silver contact pad to the right.
@peterdavey2767
2 жыл бұрын
Thanks again the last part was a little confusing due to no B-C-E not being labeled
@TaeterTot74
2 жыл бұрын
I’m Tae and I love your videos. Trying to learn a new hobby, and I was with you up til 15:58 when you identified the two transistors as NPN & PNP. You wrote them having the same c/b/e setup but they were testing as a different setup. Can someone explain this to me or am I missing something?
@s3anuk
2 жыл бұрын
great video! thanks very much for your efforts
@jnkmal9519
2 жыл бұрын
This is great! Been working with electronics for years, and I know a bit about what works and what doesn't, but I wasn't sure why. This clarified a lot of things for me. Thanks!
@knightwar3
2 жыл бұрын
Thanks a lot for these lessons
@Bestline7
2 жыл бұрын
Great stuff. You got yourself a new subscriber.
@Akolkar2
2 жыл бұрын
Excellent video PL make video on EV KITS CIRCUIT USING IGBT WITH TESTING METHOD.
@keithdownes2554
Жыл бұрын
Great video but are we testing ac or dc voltage...
@make425
2 жыл бұрын
I tried this technique to identify some transistors , didn't work with the red lead but worked with a negative. What does that mean.
@dickautz7296
2 жыл бұрын
For me its great to keep it simple, don't work on amplifiers so a lot easier. Thanks for a nice review.
@Akolkar2
2 жыл бұрын
PL make video in circuit testing of working pcb.
@jonsdiagnostic5879
Жыл бұрын
Thank you
@kironsk7697
Жыл бұрын
A amplifier's fuse which is situated on the output of a bridge rectifier getting blown off once the power is turned on. Please tell me what could be the reason of it? And I found 34 v DC on the output of this bridge rectifier though primary supply voltage is 26 ac. Is there anything worng with this bridge rectifier?
@stewbeaf3757
5 ай бұрын
I like your video's do you have anything on audio surround systems, I'm trying to fix a Teac V G1200 receiver the rear channel is not working all front channnels are good is there a rellay involved?
@stonerdave
2 жыл бұрын
that 3rd transistor appears to have a free wheel diode - I have one of those atlas tools the DCA 85 I think it is- has a curve trace function when you hook it to a comp through the USB- it is my most used diagnostic tool as well
@stonerdave
2 жыл бұрын
should have watched longer- its a darlington
@mrdavek1
2 жыл бұрын
I am working on a failed Dimma2. Resistor getting super hot. There is a 3 pin To-220 package marked TA 425 400. Anyone know what that is as its in line with Resistor cooking?
@vahagnmelikyan2906
2 жыл бұрын
How did the bias transistors work?
@cndbrn7975
2 жыл бұрын
Thank you Sir, that helped clear up some of my confusion.. Sub
@japhetobandajunior1943
3 ай бұрын
Great video, you only forgot to explain the meaning of transistors gain...
@peterdavey2767
2 жыл бұрын
But over all a good presentation
@flinfaraday1821
15 күн бұрын
At around 7:20, why is there a reading with positive probe on the base? Does electricity not flow from negative, which then would be blocked by the diodes?
@davidthompson7334
5 күн бұрын
Yes it is blocked by a diode
@RixtronixLAB
2 жыл бұрын
Nice video, thanks for sharing :)
@HairyHu
2 жыл бұрын
Germanium transistors, because of their low forward bios voltage and low capacitance of the base emitter junction, used in RF amplifiers and tuners. The same goes for germanium diodes.
@seeithappen1
2 жыл бұрын
Multimeters have come a long way showing all this detailed info about a transistor.
@LearnElectronicsRepair
2 жыл бұрын
Two of those testers are semiconductor analyzers rather than multimeters The cheap one is if the LCR-4T. I made a review of this one back in June of last year kzitem.info/news/bejne/o46Ym5WEb5OXn20 It cost me €6, though they seems to have increased in price a bit since then. They are still very good value for money, if you can't afford the DCA55. www.aliexpress.com/item/4001359753689.html The Atlas DCA55 still seems to be about the same price I paid for mine in 2014. This is my preferred semiconductor tester, for reasons demonstrated in this video es.farnell.com/peak-electronic-design/dca55t/analizador-103x70x20mm-semiconductor/dp/3727476
@seeithappen1
2 жыл бұрын
@@LearnElectronicsRepair Yes I mistakenly thought that it was a multimeter, because I didn't know about semiconductor analyzers. Thanks for pointing out to them.
@PrestonJWard
Жыл бұрын
How can you check these same transistors in circuit with no power on or can you?
@dondywondy
2 жыл бұрын
I love these videos, especially the notebook drawings! Thanks so much for making them! I've played with electronics since age 20 or so (now in my 60s) but never really got how to diagnose & fix stuff much. Now I'm seeing the light! BTW I've always used the phrase 'not pointing n' to instantly identify NPN transistors on schematics (because the arrow points out, not 'n'). After some time I began referring to PNP symbols as 'pointing in pointer' but I never really liked that one, ha ha. Thanks again!
@ShotgunAU
2 жыл бұрын
Cheers Rich.
@LearnElectronicsRepair
2 жыл бұрын
You are welcome
@garfieldbunting8824
Жыл бұрын
You should have been my physics teacher.
@fisforfriendship6093
Жыл бұрын
i think you should of really covered what dc and ac were for the firs video of your series. otherwise i can see everyone being lost especialy when they fry stuff meant for dc only
@karensingh2020
2 жыл бұрын
heres one i have for you. i have a few cassette deck motors. they have a speed control circuit in them. there is a 4 terminal transistor. is it a transistor or an ic? had to put one of these in a getto blaster works well!
@LearnElectronicsRepair
2 жыл бұрын
Well I need the part number to tell you that. There are some four terminal transitors that I know of, the extra terminal is often a 'shield' connected to the metal case of a transistor and you generally only find this in high frequency circuits (radio receivers/transmitters)
@karensingh2020
2 жыл бұрын
@@LearnElectronicsRepair cant get the part no as they are in the end of the motors. looked at another bigger motor and this one had 3pins but it is still that same type. the body has a 3 point star hole. no heat sink. these can be either 3 pin or 4.
@NilsJakobson
2 жыл бұрын
Very clear explanation. Dave Jones could learn something here.. Just kidding :)
@w8lvradio
2 жыл бұрын
Great Video! 73 DE W8LV BILL
@TABE-O
Жыл бұрын
You r a legend. Best channel on u tube fir electronics
@sarockpashotan
2 жыл бұрын
i am from iran. i have learnt how a transistor works bt watching your useful and nice video but i want to know how a resistor is applied in cirçutes example for B and how for E or C when someone who is going to desgin an electronic sircute is there any specail knowledve for learning that?!! ofcourse there is i think so? so what is that? And how to get that? pleasse just guid me as a teacher. thanks a lot.
@aliwho
11 ай бұрын
Hi I won't a belt 4 my transistor radio we're do I find one please
@Barnaclebeard
Жыл бұрын
Put this on to help me sleep. Turned it off because it sounds like a bar fight.
@dr_ned_flanders
2 жыл бұрын
Transistor symbols: arrow points uP - PNP, arrow points dowN - NPN
@ronb6182
2 жыл бұрын
Yes that's one way of remembering I always remember the PNP transistors arrow pointing toward the base. Then the other is opposite. 73
@tiroyamodimogalobaitse-xg3mk
Жыл бұрын
Hi hll I need a number can match with D4515 transistor plz
@andreasmoll_0924
11 ай бұрын
Why they don't build transistors in that way, that the base is always in the middle, so you don't have to search for it?
@mossmm73
2 жыл бұрын
Sir what an excellent programme but why struggle with probes Why not use small croc clips instead of time waste ans struggling
@LearnElectronicsRepair
2 жыл бұрын
I use crocodile clips sometimes - and yeah I probably should have dome this time. Fair comment 🙂
@post_24.
11 ай бұрын
Something disturbs me. How can a voltage be negativ when at zero votage no voltage flows? ...0v -1 -2 -3 ?
@VndNvwYvvSvv
9 ай бұрын
By transistor, apparently he means BJT, excluding FET.
@scotthewitt6047
Жыл бұрын
Can you swap out a germanium for a silicon
@LearnElectronicsRepair
Жыл бұрын
I doubt it is that simple - Germanium have 0.2V forward bias and Silicon have 0.6V for a start. I guess a lot would depend on the circuit.
@NewbFixer
2 жыл бұрын
The base - emitter is higher resistance (higher voltage drop) because the emitter is more doped.
@LearnElectronicsRepair
2 жыл бұрын
Yeah that is correct.
@NewbFixer
2 жыл бұрын
@@LearnElectronicsRepair Thanks Rich, It was for the viewers 😊Hopefully the word dope will make the youngsters curious to what it is and go check it out. 😂
@LearnElectronicsRepair
2 жыл бұрын
@@NewbFixer I also wondered what some viewers would think about transistors going 'hard on'. Contrary to some opinions this does not only happen if you use your device to view porn 🤣
@NewbFixer
2 жыл бұрын
@@LearnElectronicsRepair lol
@Sicktrickintuner
2 жыл бұрын
What parts on a power supply circuit board don’t work when it’s cold but works when it’s warm/room temperature?
@LearnElectronicsRepair
2 жыл бұрын
That sort of fault is most commonly caused by 1. Resistors, 2. Capacitors, 3. Transistors. But it could be caused by any type of component or IC. The easiest way to find this type of fault is to use a hair dryer or hot air station set around 100C to warm up different areas of the PCB, and Freezer spray to cool specific areas.
@Sicktrickintuner
2 жыл бұрын
@@LearnElectronicsRepair perfect thanks, been trying to diagnose a digital readout power supply, had bad capacitors blown up on it and replaced it, worked well for a while, then stopped working again. Wasn’t working when it was 5C then 10C now it’s room temperature. Resistors tested good to all. One ER302 voltage regulator is suspect as I think it’s leaking current backwards. Input of 70V ac down to 35v and without load it’s dropping to about 28V. But I will try the heat/cool. And see what might be the culprit. Btw love the videos you have done. I have very little experience with circuit boards but it’s starting to make some sense of it all
@HairyHu
2 жыл бұрын
Look for faulty electrolytic capacitors. Old ones dry out, and loose their capacitance, but when they worm they work better.
@Sicktrickintuner
2 жыл бұрын
@@HairyHu yep that was exactly it, the power monitoring circuit had a bad cap in it. The freeze spray worked fantastic on it.
@Sicktrickintuner
2 жыл бұрын
@@LearnElectronicsRepair Forgot to reply, the freeze spray worked fantastic to find the bad voltage monitor cap, just a tiny thing
Пікірлер: 210