Added: 4 months ago
From: Afrotechmods
Views: 22,138
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  • I thought metallic bonds created a sea of electrons on the surface of the protons

  • "the electrons can't just jump through the air from one wire to another"

    Actually they can, provided you have a high enough voltage ;-)

    Check my channel vid to see an example...

  • awesome video. You should be teaching at schools. Any news on the voltage tutorial video?

  • great video

    i'm totally subscribing

  • What happened to the next video, I hope you still go through with it!

  • "Very handy for when you don't want to die in a terrible fire"

    LOL too hard

  • i finally understood what the amp and current is, the educational system where i live is such a big failure T-T

  • @Tarek0Kadoura You're not alone....

  • Your videos and reviews are awesome! You should do a more in-depth set for use in schools, etc..

  • lol im 16 and we learnt all this in 1 day at A level physics, just remember guys, voltage=current x resistance, it pretty much gets you through electrical physics altogether

  • you are awesome sir. hope you dont mind, i use some of your educational videos like this in my school ;)

  • "Very handy for when you don't want to die in a terrible fire"

    Made. My. Day.

  • you are a life saver

  • AT 2:33 -> GREAT SCOTT!

    Wow, that just made my day XD

  • Great video and all but you should really consider putting a safety switch or disconnect on the circuit with the portable doomsday device, someone could get hurt.

  • 3:20 Yes they actually can like lightning strikes.

  • What about the "Aether"?

  • thanks for the video.

  • Are you ever going to make that tutorial on pull up/down resistors? 2years and counting...

  • Why dont we just call the positive negative and the negative positive?

  • where did you get those led lights for the switch test?

  • Your vids are always helpful. Thanks!

  • Great Vid, looking forward to the voltage vid. Any tutorial on magnets and relationship with electricity would be killa.

    thanks

  • Fantastic tutorial buddy! thx for making it!

  • Loved the video, laughed @ 2:28, when I saw dr Emmett Brown :)

  • Nice video, thanks a lot, it's really helping to understand how exactly it works!

  • lol this video has what i saw on first grade of highschool :)

  • I have come to enjoy your videos, style of teaching, and vocal/material clarity. I am just starting out in electronics and would love to see some more "ground" up videos on circuit building/analysis as well. Heck, I like your videos so much, just as one watcher, Id be happy to donate a dollar or two every month to see that these are produced regularly. Keep up the bad-ass work.

  • MORE VIDEOS PLEASE!!!!!!

  • damn I now I am more intelegent. thanks man. I never know about the flow of current, our instructor taught me the conventional way. thanks again.

  • You can blame mathematicians for the conventional current versus electron flow. Its because when negative charges are moving its the same thing that positive charges moving to the opposite direction. So think of current like the "gaps" between the flowing electrons. The "gap" moves to the same direction as conventional current. Or if you dont care about electrons and stuff, dont think about it, it makes no difference.

  • @kaalimato2 thanks for explaining..:)

  • yeah...obviously they're ought to prefer conventional current.....designing millions of new circuits again according to actual direction of current is a complete madness...!!

  • I liked the conga line.

  • Another Outstanding video from this guy who obviously is an excellent teacher... love those little humor snippets too. Great job.

  • Please do more videos like this.

  • @R4PTORZWIN I will. The next one will be on voltage, but that's going to take time to put together.

  • @Afrotechmods

    Handy for when you don't want to die in a fire? LOL. If you keep adding this delightful humor to your videos, the time it takes to compose them is well worth the wait.

  • @Afrotechmods

    This stuff helps understand basic of electronics thanks

  • @Afrotechmods Damm you're so good at explaining, you do need to make some more videos, voltage, resistance, static electricity, magnetism would all be great, whether your studying physics, computer engineering, electric engineering, mechanical or even chemistry (:

  • @Ryosuke1208 magnetism is a force near impossible to explain, as no one knows how it truely comes about, plus, as a chemistry student at a level, learning about it isnt fun at all, biology, thats fun, (true story our mates were using hearts from dissection as knuckle dusters, biology is very interesting and weird)

  • @ObservedFIREFLY "Magnets how do they work?" Yeah so much it became a meme, i know i also like biology and it can be weird when you look at all the complex systems of life.

  • @Ryosuke1208 especially when you use the complex system of life as a boxing glove

  • @ObservedFIREFLY What do you mean?

  • @Ryosuke1208 i said it in my first comment but i think i didnt give much detail, i do A level biology physics and chemistry, (massive nerd) and we recently had to learn about the heart, when we got to dissect some pigs hearts most of the people where rapping the hearts round there hands cause they looked like boxing gloves, it was funny as fuck, kinda disturbed aswell

  • Ohms law is poopy

  • since they've taught us "electron flow" like an electron is flowing from one end of the wire to another, ive always thought why the copper wire doesnt run out of electrons after using it 10 years under 5 amps for example... and the question is: if they're just switching the places, who is the real supplier of electrons? battery? is it pushing electrons to the other side?

  • nice, very educating. . .keep it up. . . =)

  • technically the convencional current from positive to negative is not a mistake, its called the "holes current" and the holes are the little space that the electron leaves when is moving around the conductor , no matter where the current is taken never is a mistake The K. Laws always tell us the direction of the current, provided always take the same approach the draw the currents.

  • Kinda like a konga line rofl.

  • lols at anime expo conga line

  • " that's handy if you don't wanna die in a terrible fire"

  • @Afrotechmods today you can see wireless charging , how that works?

  • sounds to me like perpetual motion is occuring in wires

  • Excellent tutorial! Thank you so very much for your efforts. I learned a lot . Please keep up your wonderful work. One request: Could you take into consideration that a lot of people benefitting from your tutorials dont have English as their first language, so if you could just slow down a teeny bit. Of course, pausing and rewinding is doable but that becomes a distarction for the learning process. Thank you once again. Take care! :-)))

  • stick around hhhhhhhhhhhhhhhhhhhhhhhhhh

    I am sticking

  • I cannot wait to see your next ingenuity

  • I like your videos so much My friend Afro

    I have a question, why we don't hear the drifting sound when the electrons are drifting away ?

    :) just for lough, I really liked using the word drifting here

  • stick around!

  • Your ability to give straightforward info, and keep it enjoyable is superb! Can't even begin to tell you how much your videos are appreciated...

  • You could probably demonstrate the idea of "speed" with a line of ball-bearings (or marbles). Push a new ball onto one end and one at the other end drops off. Each ball hasn't moved far but the effect has quickly moved from one end to the other.

    Great video BTW.

  • @Jainh872 That is an excellent analogy.

  • Nice video

  • As usual, awesome work!

  • +1 for you sir and another amazing vid!

  • Excellent work once again, AfroTech! However, at the risk of sounding nit-picky, one minor point should be made for the sake of clarity: Only electrons from the outermost or "valence" shell of an atom are able to travel from atom to atom. Thus, only a small minority of electrons actually conduct current, while most (along with the protons and neutrons in the nucleus) remain stable, thereby preserving the physical & chemical properties of the metal. None the less, superbly done, Sir!

  • @flurng For anyone reading this, I deliberately simplified the hell out of the atom models. The number of electrons and the nature of the orbits is wrong, but it's good enough for explaining the nature of electric current. If you want to know more, google "modern model of the atom", "s p d orbitals" "valence band" and "conduction band". This is typically covered in upper level high school chemistry classes.

  • @flurng Very Interesting response, you actually made me understand the whole shell and valence thing and how the remaining electrons preserve the physical structure in one pharagraph when i've read and read and read and could not fit it into my head, thanks. You should start doing videos too. What I love about Afro Tech, is that he somehow knows how much to leave out, to make a complicated subject easy to understand, he seems to do this unlike anyone I know. KUDOS TO BOTH OF YOU...

  • @175726 Thanks for the kind words - I'm glad my input was helpful. And you're right - Afro Tech has done an astound job, as always!

  • nice video, very basic but still usefull for begginers

    extra points for burning a fuse :p

  • It's the subtle use of humor that sets your videos apart, and makes them not just very informative, but fun to watch too. Your hard work is appreciated! :)

  • Awesome !!! Dude you rock. Its media like yours that might one day eventually replace school altogether imho

  • I teach electrical and electronics at a community college, and I enjoy and use Afrotechmod's videos. Clear, concise, and funny. I read that electrons actually flow at about 1/3 the speed of light, while current flows at (as was noted) close to the speed of light. One other thing. Look at electronic symbols for diodes and transistors for example. Arrows point in the wrong direction for electron flow, but just right for conventional current.

  • I love your vids.

  • Great job I can't wait to watch the second video :)

  • 0:01 "current and amps" same thing?

  • @snomimons Amps is a measurement of current, yeah, they're pretty much the same thing

  • If the negative contact is the return path, then why is the energy from the battery not recycled?

  • @MIKON8ERISBACK because a battery is fueled by a chemical reaction that produces electrical energy and will eventually stop. in rechargeable batteries, ou are able to put electricity back in, reversing that chemical reaction so that it can happen again

  • @zombiepancakes21 OK. How about the basics of alternating current? I need to know more, and the basic courses in high school are not open to me right now, or ever.

  • @MIKON8ERISBACK AC is when instead of the electrons in the wire moving in one direction, they move back and forth. In AC, electrons current move back and forth at different speeds, and that speed is measured in Hertz(Hz) or the number of times the electrons move back and forth per seond. Thats most of the basics, but I could spend paragraphs talking about inductance, resonance, wave shape and how AC is used, but there are MANY great descriptions on youtube, try searching up some of those terms

  • Great video. Clear, concise and accurate. I'm looking forward to the next video. Thanks.

  • Fantastic idea for a video series! Thanks!

  • do you have the next video

    

  • Thank God for this discovery, leading to the electric chair.

  • keep making awesome videos.

  • @Zaxhacks 2in the first, 8 in the second, 18 in the third 32 in the fourth

  • I like ur vids <3 <3

  • Your atom model is wrong there can only be to electrons in the first ring

  • Brilliant Afro. Simple and to the point. Thank you.

  • Great tutorial !

  • Thank you thank you thank you!!!! I was a little lazy in my last 2 years of school and thought I didn't really need to study much and although I did manage a low A for electronics I've forgotten it all now 2 years later so it is nice to just get a refresher on some of those things.

  • You have done it again. Great tutorial!!!

  • Thanks Afro, these videos are aweesoommee. I love the drawings and all. Great stuff.

  • Does it matter if the switch is on the positive or negative side? On a simple circuit like that it probably won't matter, but I was wondering if there is an advantage to use one over the other.

  • @xiaoyangkao2 On paper it makes no difference, but when building things it can be safer to put the switch on the positive or live wire. That way if something goes wrong, you only have one wire that could short out to the (presumably grounded) chassis, instead of having a boxful of components that are at a high voltage with respect to ground.

  • I thought that the assumption mistake thing wasn't which direction the current flowed, but what the current is made of (which determines the flow direction).

    That is, electrons are current from negative to positive, but "back in the day" it was assumed that positive charge carriers were current which went from positive to negative.

    From my tired 5AM memory... I thought the Millikan Oil-Drop experiment solved this whole thing by proving it was electrons that were the charge carriers.

  • ok i will stick around!!! :D:D:D

  • Really great video, lookin forward to the next ones :)

  • Nice BTTF reference there. :)

    Good video, explains things very well.

  • "very handy, if you don't wanna die" *rofl*

  • This is a beautiful lesson!

    Thanks a lot!

    I send you a dear greeting from Italy.

    Nicola

  • Keep it up sir!

  • You do a great service to the community. I'm in upper division Computer and Electrical Engineering classes and I still find these videos entertaining.

  • Wow, this is great <3 Thank you for using my video of the conga line, and thanks for linking me over. These are really fun videos :D

  • Love your vids, so simple but so imformative , can you do a vid about RLC circuits?

  • Who would dislike this!? This is informative funny and entertaining.

    A freakin + man!!!

    lol at the tiny Doc pic, hahaha!!!

  • Our profesor at the university told us that electrons themselves don't travel at a speed close to the speed of light. The thing that turns on electrical appliances is electromagnetic energy which is emitted at the moment when electrons start flowing. This is explained by the Poynting vector S = E * H. This vector however does travel with a speed close to the speed of light.

  • saves my time explaining amps to my friends

  • Thank you for another great video.

  • I am so glad that the dooms day device is portable and runs on a C-cell battery. This will make it so much easier.

  • 1:29 random cosplay FTW :)

  • nice!

  • When Benjamin Franklin was doing his experiments with electricity, the existence of subatomic particles—let alone atoms—was unknown; the electron wasn't discovered until the late 19th century by J J. Thompson. Also, he got the flow wrong, but, like you said, by the time anyone figured out how electricity really flowed, there was enough work done on electrical engineering that editing the textbooks would have probably been a headache, hence "conventional current flow".

  • @Desmaad Bumping this comment to the top for the great info.

  • @Desmaad It not wrong because they speak about current flow, not electron flow. It seems wrong because the most common current flow we see is the electron flow in metal conductors. There are cases though, for example when the circuit is closed by an ion flow that the actual particle movement is in the same direction as the current. I guess also that in antimatter metal conductors the current flow is the same direction as the particle movement, lol. Just forget about particles and you'll be fine.

  • You have so nice voice. 

  • Excellent explanation on electron flow

  • VERY well done!! I love your video about caring and NOT caring.

  • @OldSchoolSkill Could be. Wikipedia would probably have the answer.

  • you would show up 99.99% of professors in electrical engineering around the world. I received a 3.5 in EE at a respectable school. You make the professors look like monkeys playing with their wee wees flinging poo. good work buddy. love your videos.

  • could you make a video on what the function of a logic analyzer is and what you can do with them? if you could that would be awesome.

  • Interesting video! 

  • Thank you, also. I like the "you'll die" comment. Flowed just like the current then ZAP. Well done.

  • this is a DC example Is it the same as AC?

  • @Kurtreidable With DC, the current only ever flows in one direction. With AC, the current flows forwards then backwards repeatedly. Hence "alternating" current.

  • @Afrotechmods Thanks for the reply. Very informative.

  • Fuses are handy when you dont want to die in a terrible fire. LOL.

  • at 2:34 you forgot 100,000 amps - photonicinduction

  • Great videos, your fet and voltage regulation videos saved my life when I was trying to figure out a decent PWM high output LED circuit. Keep up the great work man!

  • I like how you get to the point. Your a very good teacher.

  • 6.24x10 18= 624.000.000.000.000.000.000 electrons per second WOW!

  • i want to download all your videos directly to my cerebral cortex!

  • portable doomsday device LOL

  • Thank you.

  • Great video! Very informative!

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