Hi Mehdi!

I like diodes And also this Mehdi guy

Done bro

Does he electrocute you with his electric guitar.

Hi Mehdi 🙂 it's Nice to see the most funniest ElectroBoom Made Another New Video Thank Goodness Because I've Been Waiting For Someone To Post More Entertaining UKposts Videos That I've Subscribed To ☺️

When you get paid by an hour:

They also derive lengthy equations... So I guess it's understandable

@@commieSlayer69 it's not about if they derive it from lengthy equations if you can't understand what they are talking about it doesn't matter I bet I learned more from Mehdi then my professors from my uni

@@commieSlayer69 Everybody is gangsta until yo are asked to calculate the depletion region based on the doping concentration and applied bias voltage =)

That's a common problem with lectures... they seem to be too focussed on "the details of X" instead of - at least at first - list all the different basic things and then go into the details. We had a professor that took that to the max: one year worth of lectures about how to make steel from iron, instead of the planned "material and machining basics".

I think those are just many diodes in series

HV Si diodes like 15kV are composed of dozens of series PN junctions, with under 1kV blocked per diode. As such, the forward voltage is much higher than an ordinary Si diode, like 10-50v per device. The individual diodes they’re comprised of are quite thick and have a much higher voltage drop than ordinary diodes (~1.5). The magnitude of this resistance varies with construction as a standard or ultrafast device (like a 60hz xray tank/microwave oven diode vs high frequency voltage multiplier diodes), but either way they exhibit a great shift in forward voltage (which is seen very obviously due to being multiplied by the number of series voltage drops) with current.

da nunu dannna doo danooo banana

.

Or parallel.

I can confirm It kind of is😂

:D Yes, while there is some truth to it, you should realise that his videos are all scripted (just in case it wasn't obvious). Here's a great interview where he talks about his production routine: ukposts.info/have/v-deo/raSmqqOwrJenw40.html So he (almost) always know what he's doing (except in the case of the Jacob's Ladder case which almost killed him) Here's the Jacob's ladder video (the important moment is exactly at 8 minutes ^^): ukposts.info/have/v-deo/pIRkqn2YhoKI0nk.html If you want to know more details, there was a great talk together with Dave (EEV Blog): ukposts.info/have/v-deo/jYOlimmxsJ6Yz4U.html The important part starts at about 16 minutes ^^

@@Bunny99s oh so thats teh jacob incident. I thought he killed someone called jacob.....and couldnt find a video on that...hahaha

Well, he is an electrical engineer. He knows a LOT more than someone like me (a lowly electrician) when it comes to electronic circuits and the nitty gritty of how electricity works at a fundamental level. However, when it comes to conduit, wiring, and all that jazz I think I'd have the upper hand since that's what I do every day. I do have to be familiar with a lot of the same concepts because if I wasn't I would just be some schmuck putting black to black and white to white and not knowing how anything really works. Still, when it comes to testing a panel we installed in a switch house (where you have equipement costing 10's of thousands that controls hundreds of thousands of volts that power the grid) we do get nervous. You can do everything right and have a faulty relay that trips when it shouldn't and that will take your breath away! And of course you never want to see the magic smoke, because once it's let out then, well, she's dead, Jim. Yea...my job can be stressful, but also awesome, because I deal with the power grid every day and any little mistake that could bring a line down could cause a HUGE amount of money to go poof. Not to mention if you are outside working around 500Kv and you have induced voltage on the equipment you're working on. That's why we have grounds! All that sizzling can be kind of invigorating though! I think I'm going to get a subscription to Brilliant though. I really want to know more about the engineering side of things.

totally agree! When a teacher is passionate about what he teaches... thats the best thing a student could wish for. Luckily we have internet and people like Mehdi to fill the gaps our teachers in college leave ^^

Tunnel Diode: Say sike right now. Constant current diode: First time? Lambda diode: Sike ! Gunn diode: You can’t see me !

go to schol becase teecher says go to schol? am i circus animel or what? i make yt videes becase thats my dreem. liv my dreem is what i do. thats what i do. hopefooly the videes are good for you deer scott

You have been designing electronic for years without elementary knowledge ? No way bro..

@@jmenonenidulezite561 You don't need to know how electronic components work on an atomic level to understand how they behave and use them. It's just general knowledge and unless your work involves building or designing semiconductors, it's quite uselss to know it.

I've learned two ton!

​@@AxeActly That is literally one thing you dont have to know ok, but he said he learned ton of it.. I would be ashamed, Iam working in design too and something like diode characteristic is just an tip of iceberg.. They didnt mentioned frequency problems at all, temperature characteristic,recovery time,etc.. Iam just saying that if someone who dont know this desing some serial products.. I hope not.

Congrats internet stranger. Godspeed

Congrats you made it through!

LETS GOOOOOOOOOOOO!!!

congrats

Not an easy degree :) Congratulations!!!!!

Only until you run out of fingers.

@@jhonbus still got toes

@@thunderbolt997 I got a chuckle imagining someone trying to use a table saw with their feet.

@@thunderbolt997 got a spare if you're a boy

Lol 😂

engineer gaming

engineer gaming

And things go boom (or poof)

yes

engineer gaming

Actually, the photoelectric diodes (solar panel diodes) are still very small, just very large numbers of them arrayed in a grid.

huh

I think it was discovered by people working on ships and noticing the light changed the readings

Engineers are the true heros of this world.

Actually the solar panel was invented in the 19th century. It was many decades before we understood why it works.

I think he's trying to kill the stupids and make the other smarter

It balances out.

To include much of the American audience you have to do stupid stuff or you'll lose them in the math.

Yes, however the selective breeding is significantly lessened in "back-to-back" applications.

Not so much selection but designed for specific traits. Selection implies they are manufactured and then selected for their required purpose and that isn't what happens.

@@deang5622 Material/construction selections produce products that emphasize different properties, that's what I was getting at.

do you have a book (book title) about this that you could share?

You can get a tunnel diode with a heterojunction (or just a normal junction of very high doping). Both of these have normal (ohmic) contacts not Schottky. I thought that's how they were made nowadays but I checked and it seems that there are some schottky MIM tunnel diodes out there. And if you're going for RF/microwave diodes, why not also mention Gunn diodes (which is barely a diode, but also used for high frequency) and IMPATT diodes (Definitely a diode, but more like a zener/avalanche diode than anything else), Wide BG PIN diodes, etc. I think of all the diodes I mentioned, PIN are probably the most common that didn't make it into the video. You can just buy those normally and they're not even that expensive. Even PIN photodiodes are available. I think solar panels use PIN, though I'm not sure about that. For anyone reading this later, a PIN diode is the same as a normal diode, but it has a layer of insulator between the P and N. This increases the depletion region by the width of the insulating layer. Because of this, they have more capacitance and also much higher E field. Because of the E-field they can switch very fast. Since the depletion region is large, some photodiodes are PIN diodes, since optically generated electrons are swept through the depletion region and out the diode very effectively from the high field, and there's a larger depletion region for the photon to hit.

@@BardhAzizi w2aew has a few diode videos including tunnel and pin diodes.

I like your funny words magic man

@@samfedorka5629 There are some kind of diodes, which are able to behave as negative resistance, if I remember correctly. Does it the PIN diode, or something else? (or I misunderstood something in class years before?) :)

Electroboom 101 series is dedicated to over-editing the videos after all!

How is ur comment 6 hrs ago while the video is released 17 minutes ago !!!??? They are watching us !!!!

@@motabhainfriends8461 wait a minute! WTH?

Exactly

If you think that diode accuracy is bad, try looking at fuse accuracies. We are talking tolerance levels of 100 to 1000 %.

@@henke37 ukposts.info/have/v-deo/ol2io3mPpKGLyY0.html

@@henke37 The ultimate "meh, close enough" Except when it results in fire. In that case, it's more like "an effort was made"

Did you actually win the printer?! Awesome! Which one?

The Lulzbot TAZ Pro S! :)

lucky you

Man the video is just uploaded 6 mins ago how do you posted a comment 10H ago😐?

@@thuggamo1988 patreon with early access to videos.

You are correct. "linear" does not refer to the voltage-current plot, it refers to their linearity in the algebra sense: If you sum or scale inputs you get summed and scaled outputs. The instantaneous voltage and current do not have a direct linear relationship. Instead, there is a linear relationship between the voltage and current *functions* in the Hilbert space.

He missed the type "diac" and "triac" though. The diac is essentially two diodes in series and the triac is like a a diac with an off-on switch, kinda like a regular transistor, except it allows current to go in both directions. You can use a diac and a triac to build a simple dimmer circuit for incandescent light bulbs by using the forward voltage of the diac to trigger the diac. There are plenty of examples of this circuit out on the web

Edit: diac should trigger the triac*

Edit 2: the diac is not "two diodes in series" but parallel.

@@TheExileFox im not sure how does Diac work Diac Is 2 diodes in parallel with opposite directions right? So what purpose does it have? If the diodes have different direction then current can flow both ways or not? Therefor it cant be used as normal diode

Yeah, it's awesome. He is a mad scientist of electronic equipment collecting - there must be some serious investment in all that old stuff. I get the impression he is selling (at least some of) it off after renovation, to fund his addiction.

Ummmm, well, I wouldn't consider diodes as a integral aspect of VFDs. The diodes primarily just provide the rectification from AC Mains to DC that the circuit operates on, which is pretty much the diode's normal use-case (as in "full-bridge-rectifiers"). A VFD is basically just an adjustable inverter, and operates in a similar way to a Switch Mode Power Supply and many other modern electronics. Search UKposts for the following phrase and you will get a good rundown on 3-phase VFDs... "Variable Frequency Drives Explained - VFD Basics IGBT inverter"

Really? You got teachers that bad ;)

Now go look up diac and triac. The diac is like two of the same diodes in parallel but facing the opposite direction allowing current to flow both ways. The triac on the other hand is like a hybrid between a transistor and a diac, so if you supply the gate with enough current, the triac will conduct power in both directions

Seconding this

Do you mean the piano music? I'm pretty sure it's taken from the game "Getting Over It". Try this -> watch?v=T2a8i8BKV60.

Yeah lmao

that would be interesting to see

That scared me cuz I thought I got it wrong in my exam

Nice. Using the very high slope of I-V curve near the reverse breakdown region.

Well, if you stick two diodes together, so that they share either the P region or the N region in between them, and apply a small voltage to the middle, that's a bipolar junction transistor!

@@zuthalsoraniz6764 But that bipolar transistor will not work. And the reason is: the transistor works because the base layer is so thin. Using two discrete diodes back to back, the middle base later is too thick, too wide.

Yes. That the lecture did a poor job on account of there being multiple ones, over the course of multiple hours each. So the universe said: here's a better, shorter, and more entertaining 'lecture' on them that you can watch from... Well, almost anywhere, even while at the next lecture session us you want to do some real meta-shit! 🤣

This would be a cool demo.

I'm pretty sure he's done that in an earlier video on them. I remember somebody has, and it makes sense that it would be The Rectifier...

Mr. Carlson has already done this here: ukposts.info/have/v-deo/qYSTamuYpo9ywI0.html It’s towards the end.

good idea!

I've considered that, too, being an uneducated tinkerer of electronics... However... 🤔🤔🤔🤔 ** is now considering making one using small _solar panels_ ** ☺️