Why I’m Always in Diode Mode - Let's make a test

[@enriquetomas7180]

I don't normally write on KZbin or comment about a video. But I have to say that you, Sorin, are really a good professional, a very good one. Polite, easy to understand and effective in communicating. I wish you the best and hope that you can increase your subscribers and keep up with this work. Best of wishes...

[@seankyree1619]

I dont mean to be so off topic but does someone know a way to get back into an instagram account? I somehow forgot the login password. I love any help you can offer me!

[@seankyree1619]

@Titus Elias thanks so much for your reply. I found the site thru google and im in the hacking process atm. Seems to take a while so I will reply here later when my account password hopefully is recovered.

[@seankyree1619]

@Titus Elias it worked and I actually got access to my account again. Im so happy! Thanks so much you saved my account :D

[@tituselias2945]

@Sean Kyree happy to help xD

[@fusion-music]

Great topic. Got me, because diode mode is my favourite function. I used to do fault finding in gas equipment systems, but some of your knowledge here went above my head. My mind is slower these days, but I know I never had the scale of knowledge you have and teach in a fairly accessible way. Thanks. I'm watching mainly for fun and to keep the brain interested - fight off dementia.

[@ventureelect]

I always look forward to the "HELLO" intro.

[@Riicky.Allves]

:)

[@aybarskaya6999]

Mr.Sorin I really can't get enough of your videos. I am from Turkey and If someone would explain these things in Turkish I frankly don't think it would be better, easy to understand and honest as this is. Thank you for everything.

[@a.b.c.520]

Mate you're so knowledgeable an funny at the same time, you rock!

[@KeithBITW12]

Sorin, you're amazing. Keep doing what you're doing. Finally FRIDAY!!!!!

[@gassanali8667]

A great lesson. I come here to learn things that others are intimidated to share fo whatever reason. Keep it up, Sorin. I hope I can become half as good as you someday soon.

[@juanchizabaleta2405]

Thank you for this class teacher, with practical and effective tips, with the use of the multimeter in diode mode. Greetings from South America, Argentina

[@shadrackongeri3810]

Always a pleasure watching your videos.

[@michaelmacdonald3408]

I have always wondered why the diode function has different reading than the ohm range.You have helped me immensely thanks man.

[@Nein8046]

Why does it has those other symbols?

[@emanuel-ioancretu6522]

In aceste timpuri pline de dispozitive electrice exista putin electronisti profesionisti, iar Sorin este unul dintre acestia. Foarte bine explicat, in 15 min ati lamurit o problema de un semestru de an universitar.

[@hugoboss7600]

Ce sa inveti la faculta? si profesorii sunt habarnisti, pacat pentru ca sunt studenti care vor sa invete dar n-au de la cine...

[@ericiroy9248]

Master U r So great in teaching things, Shout out here from the Philippines, Looking forward for more learnings from ur videos.Thank u

[@tinkmarshino]

As always.. good teaching Sorin.. thank you for taking the time to show us the magic!

[@minoodeboo]

Very good technique Sorin, so nice of you to explain step by step.

[@barbufodor1186]

This was an especially nice one. I would love to know ho many of us, the spectators, started to look around when you asked what is in the bag. Just like in school when the teacher asks something and you look anywhere else, but on your teacher eyes, in an effort to escape him call you out. Great job.

[@pascalphase2556]

A very useful lesson ! , you're the man Sorin...Thank you !

[@bongelectronics7773]

Thank you for sharing

[@peekpt]

In diode mode you inject 1uA current in the circuit and you measure the voltage across the semiconductors, on ohms you have high impedance and you read the resistance. Just that

[@N0G0MAIL]

"in diode mode you inject 1uA": 1mA /3V is the correct value, 1uA is too small. There is no multimeter that use 1uA in diode mode. In ohmeter mode you can have a low voltage, it-s not about impedance.

[@williamlogan4049]

Thank you for enlighten me ,always a pleasure to look at your broadcast

[@francismannion7075]

Wow! Thank you Sorin for a very interesting class.

[@Frank55]

You're a good teacher!

[@andrewverran3498]

Sorin is da man, if he cant fix it no one can.

[@sputnik4216]

Great accent, sounds like a lesson taught by Dracula! Excellent info, greatly appreciated, thanks Sorin.

[@Daveyk021]

Good teacher and good accent.

[@vdtran69]

Always learning something new Thanks Sorin,

[@aeroboy002]

mostly i wont learn anything from troubleshooting videos or very little only, but this is very good

[@boolfnasa2582]

Thanks Sorin, but what is the conclusion of this diode reading? 0.4V means the junction is good, what if it was 1.4V? what does that mean? and if the junction is bad what would be the reading? (I know a beep means short and it would be Zero in Ohm Mode that is easy), but what is the message from the diode mode you spoke about?

[@DetermineLyngdoh]

The multimeter sends a small amount of voltage through the circuit. 0.4v is the voltage drop (voltage difference between the positive and negative terminals of the multimeter) It means that most of the voltage is just going through the circuit easily with low resistance. 1.4v means 1.4v loss through the circuit because something is taking that current which means a higher resistance.

[@vishaldotgupta]

dmm's have oc voltage of 3.3v approx in diode mode. except for zener diodes, most semicons will be active at 3.3volts

[@diacomservice]

@@DetermineLyngdoh For example, the value at the output of the pwm integrated is 0.060mv. what does this mean?

[@Joligo60]

Great Sorin. One question: on the diode scale, the multitest injects about 3 volts into the circuit, correct? So is it safe to use this scale in the VCore sector since this sector works with 0.9 to 1.5 volts?

[@vishaldotgupta]

it is mainly the current that causes most demage as mentioned by Arvid, for DMM, short circuit current for DMM is too low to cause any issues

[@diacomservice]

Hi.frankly, it's a bit of a mixed expression. I've been trying to figure out how the diode mod works for a few days. The probes there, actually, the logic of measuring the diode in the reverse direction is the ESD diode protect event. In fact, negative voltage is applied to the motherboard through the esd diode in the opposite direction. and it shows the voltage drop of the diode there. but the output values ​​are not standard as in the phones. For example, if a value on the chipset line gives 0.060mv, it will give a different value on another motherboard.

[@melplishka5978]

You should do more like this. Great teaching vid bud.

[@zx8401ztv]

That's always been a problem with multimeter ohms mode, often not enough potential and current allowed to even light up a 2V led. But resistance mode is good for not turning on semiconductors, most of the time lol.

[@itresolutions951]

Always taking look on your videos

[@user-2uf2kr2c]

Hello Sorin do you have a video on testing diodes in a circuit. What the best way is. Cause i tested diodes in a circuit and i had a reading from both sides and thought the diode was broken. Then i desoldered it and tested it and the diode was good. I don't want to desolder every diode i have to test. And a question on resistors. What's the difference between smd resistors R100 and 100? Regards

[@michaelshansen7070]

Sorin, thanks, I am one that added a post on the other video. What I am asking is what number you consider a short or "ok" in a circuit. Thanks for your dedication!!!

[@T-C-M]

In diode mode reading "0000" on multimeter while repair gives you a good feeling 😅😂 thank you for you effort sir..

[@glitchd1_]

I love your videos. Thank you for all you post. Cheers.

[@danielbayugar4856]

Thanks Professor

[@electronic7979]

Helpful repair video. I like it.👍

[@Tomtech29]

it's a good idea to leave the puzzle in the packaging of what's in it ? great fun and Gives us to think :D

[@MrRvdbeek]

Thanks again for your work you are doing great 👍🏻

[@cc2onouuicc2onouui93]

This video was very helpful thank you

[@richardhemingway6084]

I thought you meant 'you' personally in diode mode. I was fascinated to see if you only conduct one way. LOL

[@bror8228]

Same here.. :o)

[@keithking1985]

funny.. that made me laugh: )

[@robertcartier5088]

A career ending situation for a Maestro!

[@roseelectronics4582]

he actually conducts one way only

[@mahlapropyzm9180]

Another great lesson in applied logic :-)

[@oaba201]

You can use curve tracer as well.

[@mattstroker3742]

I wonder if sorin has children. I can imagine a kid being very proud to have sorin as a dad.

[@frpnopc]

Nice idea thanks

[@maxwarfield6699]

I’m sorry, and perhaps it’s a language barrier thing, or maybe I’m just too much of a novice. But, I don’t understand what this video is trying to demonstrate. 1-You want us to figure out, what component is hidden behind a 1Kilo Ohm resistor AND beneath a silver bag [?!]. 2- So, with the multimeter on resistance mode, you get a reading of 1kilo Ohm [the circuit is not powered]. 3- At 6:53 you power/inject the circuit with 5volts [1amp]. 4- You then check on diode mode, and you get a reading of +/- 0.5volts and say:”...it is not necessarily a diode, it is probably a junction [diode, LED, etc]”. 5- Finally, the component is revealed - it’s a mosfet. So, I ask: “How does one apply, any of what was said and done, in this video, on an actual circuit board? Also, if you are not blind, when you are placing the probes on a circuit board you will see/know, what component you are testing? So, why did you hide a mosfet beneath a bag? When does that happen, on a circuit board? If you want “... to see what is further down the power rail”, just use your eyes! Seems to me like it would have been more useful, to explain WHERE and WHY one should START by placing the test probes on a circuit board, when you are trying to diagnose an issue with it. What was the point of this whole video? I’ve watched this video three times - To me, this it’s just a mess of random words and facts, with no applicable lesson in sight, that I can see. Please clarify... something.

[@yehtut3209]

many thanks, sir .

[@DannyWilliamH]

Valuable info!

[@james.8985]

[Thank you Sorin. What does it mean if the reading is higher like 2.8V in the diode mode? Does it mean there is somethings in series?]

[@kahlid-ataya]

Excellent video

[@MindYourBusiness1970]

Have a nice weekend , see you next week

[@michaelshansen7070]

Sorin, I think you said that diode mode only works to 1K. I just tried a 2.2K and it works. Says 1.2 volts... Strange, please respond here...

[@vishaldotgupta]

very good and instructive ways of troubleshooting black box type circuits. i would like to add here that tools needs to be used judiciously as per application. for a DMM in ohms mode the Open circuit voltage on probes is tool less to switch on the pn junction of semicons. Whereas in diode mode it is around 3.3 volts. Most of the modern day devices are working on these logic levels, so connecting to dmm in diode mode means as good as connecting to actual power rails. of course will low current limits .

[@bctoner]

Well done

[@khalkhal2372]

Can you explain how the diode mode work

[@Ghost572]

The one part of the video I don't get, nor is it explained, how did that MOSFET change from 1k to a low resistance when he only connected two wires to the gate and the source. Current doesn't pass through the gate because MOSFETS are controlled by electric fields.

[@salawalas]

Mosfet transistor , D-S joint, secured Schottky diode :).

[@johnjofa1629]

I observe that you always use amp to fine shorting, how do you do that with a dc power supply, please am a beginner

[@carljames1134]

Are your leads both a power supply and meter

[@fadhilipagallo1770]

have nice weekend sir.

[@maxwarfield6699]

I want to apologize for my last comment. I did not mean to offend. Pardon my ignorance. I will try again, to ask a better question. So here goes: if you are going to use the diode mode to find a short, somewhere in the power line and you get a reading of +/- 0.5 volts. Ok, that tells you, that you have a junction [you could have used your eyes but,... whatever]. Ok, but that is a good junction, the diode mode isn’t telling you that it’s bad. Then what? You haven’t learned anything more, about the circuit or about what issues it might have. Am I wrong?

[@FSX3000]

lol my thoughts are the same... He didn't give us an example of a bad one. Or even a short to ground

[@andyturner1727]

So good at what you do , thank you Sorin. : - )

[@eivolarmada1747]

Hello. Sir maybe you can do a video content on how to test capacitor, resistor, diode using analog multimeter or Digital Meter without removing in cellphone pcb board.. I want to learn on how to be a cellphone technician..

[@djrobwilliam1673]

Alot of meters will actually use a 5v signal to use the diode mode. Does this affect logic v on sensitive chips?

[@Martin-ot7xj]

Hi there, at 06:31 you said we have current limit 1 amps, you mean we have to set manually on power supplay 1 apms for safety?

[@tanner1985]

Maybe he used his "Faulty" benchtop chinese power supply :D

[@Martin-ot7xj]

@@tanner1985 i didnt understand, when we have ordered.. Linear dc power supply,built-in it has protection option, besides we must set manually to 1 apms or automatically power supply detect and safe our circuit??

[@BeetleJuice1980]

You are amazing! Ps:I noticed That you sometimes say " 2 ohms" when your multimeter shows 0.002 v in diode mode. It's volts or am I wrong?

[@BeetleJuice1980]

@duddysack make perfect sense, I will check my meter asap. I think a lot of guys would think he was just saying the wrong word haha

[@Mohamed-jn4yr]

lots of love ..

[@zobayershah6790]

You are amazing like all the time. Please, make video's on Swing machine Servo motor control Electronics Board

[@transformateur9969]

For me, Sorin is number 1

[@giorgostexnikos6976]

thenks proffesor.

[@madalinbetea9871]

Hey Sorin make tutorials about ham radio electronics builds like HF recievers,transcievers signal generator.etc

[@mohamedwaellabidi3780]

pretty video

[@interestingspagetti]

Sorin. You cannot say it's christmas jumper day and not wear one!

[@intrax2tv]

Dave Hammerton He would like you to send him one... Clever huh ?

[@weerobot]

Cool...as always..

[@HePBHuq]

I believe you put a short after (hidden part).

[@johnboscomoll2541]

Pls what type of power supply / meter do u use for testing purposes

[@hassanjafary6432]

Sir talk about your multymiter and your power supply how they work.

[@josepeixoto3715]

Diode mode,or beeping mode? thanks

[@appiahishmael5340]

Great master

[@HePBHuq]

In very rare cases a resistor can go bad - for example you get 3.3volts on the one side, and on the other one you get 1 volt.

[@michaelshansen7070]

Hello!

[@pattheitguy]

Unfortunately, the reading was unexplained. I was hoping to determine WHY using diode mode was different, or even better.

[@stark_energy]

He explained it clearly and demonstrate it. The diode mode will be able to tell you that there is something like Diode or PN junction there, and whether the circuit is NOT just resistor(s). If you use Ohm mode you can only detect the resistance, ignoring the possibility that there might be something else in circuit and will trick you into believing that the circuit is safe to be plugged into power because you see resistance is high.

[@forwardchien5914]

I was prefered use diode mode but my colleague recommended use resistor mode.

[@davidut55]

Si pana la urma, pe dioda am scurt, pe ohmi am 30. Este scurt circuit pe gpu sau nu este?

[@milandjukic88]

I dont have 1K ohm resistor, I'm Sorin 😀

[@tanner1985]

LOL

[@theultimaterelaxation6839]

The resistance is 1.026 k ohm

[@mazterz631]

Am I the only Filipino watching his educational videos?

[@michaelshansen7070]

Hello Mr Sorin can you respond here on this page so we all can see, PLEASE! Keep going, you are awesome.

[@boyiyapaboyiyapa2488]

How you connected your multimeter with computer?

[@ericayanru]

Pls where do you buy your chips from

[@MeFixingEverything]

diode, got open on 0.48v

[@mikex691]

ik

[@stonedsavage7814]

My tech training is making me think its just a dead short with crossed wires

[@pan_nan]

Dope

[@Keiichi_Tsuchiya]

64 om?

[@mariuscristea8857]

Subtitrare în romana se poate? Te urmăresc constant dar uni termeni mai tehnici nu ii înțeleg. Numai bine și Crăciun fericit

[@lorinfortuna1547]

Mai bine in engleza, macar stii ce sa cauti ulterior

[@MrAbdooo132000]

The resistance is 1.026 k om

[@mikeadler434]

👍👍

[@5ccomputershop557]

its look Liquid Battery sir