What Is a Diode?

This electronics video tutorial provides a basic introduction into diodes. It explains how a diode works and how to perform calculations when it's in series with a resistor.
What Is a Diode? • What Is a Diode?
How To Solve Diode Circuit Problems:
• How To Solve Diode Cir...
Diode Logic Gates - OR, NOR, AND, & NAND:
• Diode Logic Gates - OR...
Clipper Circuits:
• Clipper Circuits
Clamper Circuits:
• Clamper Circuits
Half-Wave Rectifiers:
• Half Wave Rectifiers
__________________________________
Full-Wave Rectifiers:
• Full Wave Rectifiers
Full-Wave Bridge Rectifiers:
• Full Wave Bridge Recti...
220V AC to 12V DC Converter:
• 220V AC to 12V DC Conv...
Capacitor Voltage Booster Circuit:
• Capacitor Voltage Boos...
Half Wave Voltage Doubler Circuit:
• Voltage Multipliers - ...
Full Wave Voltage Doubler Circuit:
• Full Wave Voltage Doub...
__________________________________
Voltage Multiplier Circuit:
• Voltage Multiplier Cir...
Light Emitting Diodes:
• LEDs - Light Emitting ...
Power Dissipation In LEDs & Diodes:
• Power Dissipation In R...
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
/ collections
___________________________________
1N4007 Diodes:
amzn.to/3eiepEW
Disclaimer: Some of the links associated with this video may generate affiliate commissions on my behalf. As an amazon associate, I earn from qualifying purchases that you may make through such affiliate links.

[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/

[@kozimambo6542]

i really dont understand how you can be so good in every subject, i mean this is too much yet you can still explain so well

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Well maybe its obvious that... ...He is a teacher

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[@azyle2104]

@@alexshazam5482 he's basically saying that this dude teaches a wide variety of things , which is very true. Look at the average youtube teacher and make a comparison

[@moments_with_IH]

@@azyle2104 I mean, bear in mind he has over 4 MIL subscribers on KZbin; that's because he teaches variety and in good ways. Guess He's just build diff lol

[@azyle2104]

@@moments_with_IH agreed

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Bro little you know you are raising kids because of your passion in teaching. I started watching you since highschool learning algebra, now I'm college studying computer engineering. You've taught me calculus, circuits, physics etc. I've learned so much from you, thankyou. now i graduated, proud cumlaude🥰

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Relatable😭

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I can relate

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same here😭

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legends are watching at Exam day🤣😅

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Bro im watching post-exam

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Me too ,man how did yours go ? 😂😂

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​@@lukanunaroyceI got good marks but now I forget these things 😂😂

[@moinali8391]

Because I am doing software engineer not the electrical engineering or something😂

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Sir you tought me more in 12 min than my professor did in the entire college semester

[@eggxecution]

bet one day you'll get interviewed by TEDx wanna see face reveal lol, keep it up I'm almost reaching 3rd year ECE btw

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You can google his face

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Probably he has turned them down

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You done with college now.. m in my second year. Lab tech

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it's been 2yrs, how r u?

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Fr!

[@TiberiusStorm]

I could've used this video about 2 months ago for my electronics test!

[@eggxecution]

hey you reach 2 million subs now, I'm very proud keep it going mate!

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How do you know ?

[@eggxecution]

@@SL33py45H been a subscriber ever since he has around 500k subs

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It's 8M now 🔥​@@eggxecution

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damn .. that video was so crisp, clear and perfect.. learnt the concept i was struggling for so much time!!

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indeeed

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I dont like it.

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@@paulkazjack edi don't

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A year after the lockdown, hearing his voice again was like the shuffle of angels feet!

[@awinimaxwell2269]

You always make me feel like the things we learn are not difficult just that those who are teaching us are not passionate. Thank you very much.

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I am wired for just physics and mathematics, this instructor seems to be wired for every course imaginable. And he is good at all of them. Does anyone else imagine him to be a tall, lanky person with long hair.

[@azyle2104]

I did , but you can google his face

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mygod like hozier ?

[@nothinginteresting1662]

Started with physics, then got interested in math and CS, biophysics, and now got interested in chemistry after realizing ic fabrication is chemistry

[@zEre326]

My lecture was 2 hours and a half, and you explained this in 12 minutes, wow!

[@JonAhlquist]

I remember which end is the anode because the arrowhead in the symbol for a diode looks like an "A" (for Anode) on its side. It points in the direction of "conventional" positive-to-negative (P-to-N) current flow, which reminds me that the anode has P-type semiconductor, and the cathode has N-type semiconductor. The vertical line for the cathode represents a wall that blocks "conventional" current from going from cathode to anode. That "wall" is represented by a ring marked around the cathode end of a "physical" diode.

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This guy is a life saver for many students especially test before a day..... notice this is guy never said to like share or subscribe hats off dude

[@Thewowhahahawow]

Pre-req: PN Junction Video from him: kzbin.info/www/bejne/m6XLn3uJnLuVftU KZbin search didn't rank it well so took me a while to come across it but it saved my life lol

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I’ve recommended you to all my colleagues. Keep up the good work.

[@done2913]

thank you so much your explanation is great

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i want to marry this guy ...he is literally the solution to all my problems!

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More MORE knowledge *maniacal laugh*

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Lmao

[@vr6isfaster]

Thank you so much for immediately differentiating conventional current vs actual electron flow in your demonstration. The difference here has confused me when reading schematics ever since I was a young student-age child.

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I manage to score well because of you

[@duncanlegend5982]

Electrons flow from negative to positive?

[@farjanasharminswarna2450]

Yes. Electrons flow from negatively charged area to positively charged area. Therefore, current which is a flow of electron vacancy or hole, flows from positive to negative. If you add a battery to a circuit then current will flow from the positive terminal of the battery towards the negative terminal of the battery through all the other elements in the circuit. To ease the confusion, think of heat flow according to thermodynamics. Heat flows from high temperature area to low temperature area. Also if you think of water, it flows towards the area where water is less or the pressure is less. Just like that everything in nature flows from it's majority towards it's minority. In a negatively charged area, electrons are higher in number. So electron flows from negative to positive. Current flows in the opposite direction of electron flow. So, current flows from positive to negative.

[@diogenesthecynic1334]

@@farjanasharminswarna2450 Thank you so much

[@farjanasharminswarna2450]

Welcome. Happy to help. :)

[@mrbushpilot]

@@farjanasharminswarna2450 but current IS electron flow isn’t it? I’ve seen it explained that way in several videos

[@smarkbustersstink3471]

@@mrbushpilot current is electron flow, but it flows in direction opposite to electrons just like positive charges. Negative charges flow from negative to positive(lower potential to higher) and positive charges flow vice versa.

[@crystalcoke9770]

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[@ElectricalSolution]

Thanks to you. Today i have clear conceft about diode.

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Make more Electronics -related Videos

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Steady saving my life as a student 😭 thanks

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tomorrow is my applied physics exam, thanks alot man! you really made diodes easy to me.

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[@successthruknowledge]

Another great lecture about diodes. I like the examples at the end. My only wish is that he elaborate on what it means to be a n-type or p-type in physical terms.

[@DiodeMom]

Dude same! I have to go look up something else now haha. But this dude is still awesome.

[@successthruknowledge]

@@DiodeMom For sure! This guy's lectures are a great introduction to electronics but he's teaching me also exactly how much more there is to learn about electronics! I'm sure that some of his lectures are meant actually for electrical engineering students whose knowledge is more extensive than mine 🤔

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You are really the GOAT at teaching. Ty for this video.

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You dear sir, are a life saver!!

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بارك الله فيك و هداك

[@isabelgarcia891]

You are a great teacher thank you!

[@BenjaminK2]

At @6:20 he assumes the voltage across the diode is exactly 0.7V, but there is no reason to assume this! Surely, the diode can have a range of possible voltage values across it, as seen in the diode's Voltage, Current graph @3:30. This variable diode Voltage presumably increases as a result of increasing the source Voltage. In light of this point, how does one then properly calculate the resulting voltages, and current?

[@danieljurgill1681]

How do you get NEGATIVE VOLTAGE ? -7 V ? Do you hook up the negative battery terminal on top and the positive terminal on bottom ?

[@yj2jeon]

As far as I know, the operating points including the voltage level can change based on the resistance but you assumed that the voltage across the diode was 0.7V. Can you explain why?

[@evwerenisaacoghenenyerhovw232]

Sir please I need video on 3 phase and Delta calculation sir.... Calculation involving load current, phase current, KVA, kw etc

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[@ponchobonjo2008]

BEAUTIFUL VIDEO! CONGRATS! I have a question for you, What is the eBOARD tool you are using? I will appreciate a lot! your feedback thanks

[@jimhalpert9803]

He has some video on the eboard. Just look for it on KZbin or something

[@Speed001]

Thank you once again, I was having a bit of trouble and there was nothing for me to check step by step.

[@OlaisaacGodspower]

Does diode block the flow of electrons as it does to current in flowing in one direction, since electrons flow in opposition with current. I.e diode allow current flow in one direction, block it in opposite direction, while electrons flow in opposite direction, will the electron b blocked hence it's flowing in the direction diode is blocking. Reply pls.

[@stphnhrst]

I've been enjoying your videos. They are extremely helpful as I learn about the terminology in my electrical/instrumentation textbooks. Could you recommend a particular order of viewing your videos to build the basic foundation to understanding these theories better? Thanks

[@JonAhlquist]

Researchers who study the psychology of learning have found that the order in which you learn something is not important. That is good because we rarely have the time or opportunity to start something "from the beginning," which is different for different people because of their different backgrounds. It is fine to "fill in" your understanding as needed. I can't say much more because KZbin does not allow posts that provide or even suggest links elsewhere.

[@stphnhrst]

@@JonAhlquist thx 🙏

[@maheshtripathi2799]

I'm gonna top the quiz

[@alexandreptito8485]

i have a question. i ordered diodes to fix something and i recieved something that looks like an old camera film. is that normal?

[@sridharchitta7321]

The current in a diode under forward bias and in constant thermal equilibrium are due to the movement of the holes and the electrons moving and recombining on and on and on. The conduction processes of p-n junctions can be easily understood if Current is understood properly by taking a unified approach to electrostatics and circuits. Electrostatics and circuits belong to one science, not two. These are discussed usually separately in textbooks and science and engineering courses. Watch the two videos listed below to learn about current and the conduction process and surface charges (using a unified approach to electrostatics and circuits) which set up the electric field whose line integral is the potential difference. The battery produces the emf. The last frame of video #1 lists textbooks which discuss all these topics in more detail. 1. kzbin.info/www/bejne/iHbWiJeabJukrsU 2. kzbin.info/www/bejne/bnO0fpKurJeFnNE [Also see Also see these lectures by North Carolina State Univ faculty which use a unified approach to electrostatics and circuits. 15. Simple D.C. circuit. Pattern of electric field. Watch from 16.0 minute. 16 Mechanical Battery Watch from 19.0 minute. Ch18L1b kzbin.info/www/bejne/e6aWe4SBp6-FkKMsi=t3MeX8Hi8ELAxaz0 17 First intro to Surface Charge Watch from 10.30 minute. 18 Surface charge gradient Watch from 15.30 minute. Ch18L2a kzbin.info/www/bejne/mKGToGR-j7Smacksi=PPiPGepbXvdTgJHX ] I have discussed the exact idea on the relation between diode current and saturation current in detail in Chapter 9 and Appendix E of textbook 4 listed in the video #1. Also explained in the textbook 4 is why the potential barrier of an operational diode can never be made 'zero'. Textbook 4 is here techsarworld.com/product-detail/fundamentals-of-electric-theory-and-circuits-559 PPTs and Videos with animations for all the ten chapters including that of pn junctions Chapter 9 and a few applications Regulated DC Power Supply, Differential Amplifier and Transformer coupled audio power amplifier of book Fundamentals of Electric Theory and Circuits are available for download and viewing here techsarworld.com/download-resource/fundamentals-of-electric-theory-and-circuits-559

[@grenouillesscent]

I dont unerstand why the naming is different compared to a battery. I thought the anode of a battery was the negatively charged terminal that has excess electrons, so why would the anode of a diode be the electron deficient part that contains holes, its just confusing. I was just reading somehting and had a thought: Is the anode of a battery actually initially positively charged, becoming negatively charged only when the chemical reaction happens within the battery and the resulting free electrons are attracted towards it?

[@danielmatter2958]

Probably a dumb question but in the 3rd example of 0V (low) going to -7(high) the diode would have a voltage drop of 0.7 volts but you have 0V passing the diode so even if the circuit is on, no current would flow because you don't have the voltage strength to pass the diode. Can someone explain what I'm clearly missing? I'm probably just dumb. lol

[@ahmedbelal7370]

The 0V in the 3rd example is the high potential and the -7V is the low potential, so the potential difference is 0-(-7) = 7V which is more than the voltage drop in the diode (0.7V), so current will flow in the direction shown in the video.

[@danielmatter2958]

@@ahmedbelal7370 that makes sense thanks !

[@youssefrefaat1594]

Hey, I think you made a mistake. Electric components in the electric circuits never consume power unless they have internal resistance. Since you provided that the diode has a voltage of .7 volts, this means it is ideal one so it has no resistance and, thus, consumes no power

[@JordanEdmundsEECS]

Any electrical component with a positive voltage across it and a positive current flowing into the positive terminal consumes power. The idea of "resistance" is only a linear approximation to much more complex phenomena, such as what happens in a diode. The only power equation that always applies is P =V*I

[@felixcat4346]

If there is a voltage drop of .7 volts across the diode it must be consuming current when it's in the forward bias mode. Its simple ohm's law.

[@bestbronzena4918]

You cannot guarantee the voltage across the diode will always be 0.7 V can you? It depends on other resistors in the circuit

[@user-wc6pp4mi6t]

@@bestbronzena4918 no, it’s always .7 with a diode

[@smarkbustersstink3471]

@@user-wc6pp4mi6t i think its just for Silicon. Germanium has like 1.4V

[@victorianogubatan569]

Hi. I'm new to this zener diode voltage regulation. Do you have a video where your output is charging a battery, with internal resistance. I want to know how much ohm resistor is required with input voltage of , say 16vdc and regulated output of 14vdc. Thanks.

[@dahooper]

last 16 seconds had me thinkin nick fury was gonna have a post credit scene

[@DeepSaikia1234]

Kaha s nuacajy bnau. Thee. Hho ngagya. Teree adjuct diode can be images contact othre

[@malaikasaboori3920]

Sir u r Great 😊🌟

[@ahmedsalam9028]

You are damn amazing 💙🖤

[@utkf16]

Learning has taken place, thank you

[@blancaroca8786]

Clickbait.. the recommendation picture said diodes explained! But there’s no explanation of why they work

[@nachomoraga535]

so in reality if the real flow of electrons is from -ve to +ve then the diode conducts oposit to what it has been said.

[@phasorsystems6873]

Resistance is futile! Be susceptive to trying out this simulator! Encounter androidcircuitsolver on google

[@sergioandresbenitezhernand2542]

but why is the current flowing from positive to negative in the example?

[@rickmarquis1646]

In my solar panel my schoty diodes are with the negative terminal of the diode toward the positive, but in your circuit are the opposite, i can't guess why, i will study this tonight?

[@chandler615]

im sorry... 5:20... when the hell does current ever flow from positive to negative..???...

[@tejasagarwal1383]

Just wanted to know, the power of a current is (currents)²voltage right? But he wrote p= vi

[@TheOriginalDeaf]

No, I will write the true formulas here: P= V * I P = V²/R P = I² * R P: power - I: current - V: voltage - R: resistance

[@abrhamgetnet8602]

where is the ur feedback teacher ? u are in silent still now

[@cin2110]

That current placement is wrong there 07:17 that current is the current that passed the resistor not the initial current

[@kingrenny]

Awesome! I got it!

[@atelectro1]

For once read your Electronic Device text book and you might understand.

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sağ ol abi

[@kazimamine]

useful and simple

[@SSS20025]

6:41 what about the resistance offered by cell?

[@ysvsny7]

Great job

[@filipivanovic9556]

I hope i will pass my exam tomorrow

[@RixtronixLAB]

Cool video, thanks for sharing with us, well done :)

[@mangosushii_.]

Hi. I have a doubt on a dicode question to ask Are you able to help

[@blackstarttv]

In 11:44, isn't that the diode is OFF because the forward voltage applied across its terminals does not exceed the diode's forward voltage threshold, which is according to the video is 0.7 volts? Please advise.

[@markermino8292]

It is on because the source voltage is in negative value, flowing through the cathode (negative terminal) side of the diode. If the negative voltage source is flowing through the anode (positive terminal) then the current wont flow.

[@michaelmelgar9368]

Anyone in electrician trade school found diodes confusing as hell as first?

[@trevorlastname2139]

Said a Organic Chemistry teacher about electronics....

[@rickmarquis1646]

Now i got they are reverse biased to impede current through poitive and negative and let i flows to the cables.

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The best tutor on KZbin

[@KevlarSammy]

No

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to correct a wrong is more nobel than covering it up.

[@nisalisadara6449]

Thank u SO MUCH.

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Love your work

[@ounie6230]

Is it optional that a diode would be on if the voltage flowing across the diode is exactly 0.7? What would happen if the voltage is less or more than 0.7?

[@muhiddenmisbak1013]

If the voltage supplied across the diode is less than the diode voltage, then the diode won't "Turn On". Otherwise, the the voltage supplied across the diode exceeds the diode voltage, then the diode will "Turn On".

[@z300b]

Why the current unit in mA?

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love uuuu

[@sarmasadyatmikam6438]

Is it your own theary.

[@tholtheary4770]

Hi my friend, Can anyone explain me how to diode in iPhone.....

[@hassatoujallow2285]

Thanks for the video. Can you please make a video on transfer function of electrical circuit

[@kamvc72]

my notes are not on my side , your videos are .

[@chriswilliams210]

Conventional Current Flows from the Cathode to the Anode against the Arrow.

[@sarmasadyatmikam6438]

Or book knowledge

[@Tonypraise-z2l]

Thanks a lot sir

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You are amazingggg