Tutorial: Electrical impedance made easy

Tutorial: Electrical impedance made easy - Part 1

Рет қаралды 719,762

Күн бұрын

This is the first video of a short series in which I discuss the basics of electrical impedance from a practical standpoint.
In this video, I show how a simple LED power supply circuit can be made more efficient by replacing a resistor with a capacitor. I describe the difference between resistance, reactance, and impedance.

Пікірлер: 872

@AtomicElectronCo 9 жыл бұрын

When teachers drop their ego and say to themselves "How could I understand this if I only had basic knowledge?" rather than "I learned it that way and so will they!" it is a fantastic gift! Thank you for helping me understand what "impedance" is!

@veronicanoordzee6440 5 жыл бұрын

You're right, but empathy is a hard thing for a lot of people.

@berryj.greene7090 5 жыл бұрын

Spot on with that comment. It's what too many teachers do. What they're good at. Their gift is to retain other people's knowledge. They might be less able at passing it on as their gift is to copy. Not much original thought. Not much deep understanding. Just a memory. Autism! We applaud and elevate autism by operating this way. We have to stop doing that. Over...……!

@SuperMadpom 5 жыл бұрын

Best teachers I've had have been folks that have come from industry and worked on the shop floor and therefore seen theory in practical applications. Worst teachers have been academics with degrees and PHD in teaching who thought by reading up on a subject they'd be able to teach it. As mature paying students we had a teacher kicked of a course for that - complete lack of knowledge outside of what was written in a text book meant he had no ability to answer questions that smart students where asking in an attempt to understand the subject.

@KendallVance 5 жыл бұрын

exactly!

@artmatthew1 3 жыл бұрын

I was thinking this too.

@vital989 9 жыл бұрын

"Impedance is just a resistance that depends on frequency" - finally a clear explanation. Thank you and keep up the good work. +1 subscriber

@bigfoottoo2841 7 жыл бұрын

vital989 No, No, No, The reactive portion of an impedance is not like resistance at all. Reactance does not consume power. It is energy stored in a capacitor or inductor from an earlier time that is opposing new energy that is being applied at a later time. A simple example would be 2 batteries connected in a circuit to a light bulb where one positive terminal is connected to one side of the bulb and the other batteries positive terminal is connected to the other side with both negatives connected together. The energy in one battery stops the energy from the other and the bulb does not light.

@harveykeller5646 6 жыл бұрын

BigFoot Too many

@88njtrigg88 6 жыл бұрын

harvey keller "to many?" What is your point.

@MrHBSoftware 5 жыл бұрын

i understood his point Nathan..."too many" words or too much crap is what he means...probably not a native English..i am not either......the oversimplified explanation is a good route for people to fit the definition in their heads and allows them to further get deeper in the subject...if teaching all the crap at once like BigFootToo is stating and then adding the math, people get overwhelmed and understand shit about the subject....this is a common mistake with almost all teachers..they have deep knowledge on the subject but ZERO knowledge on how to teach... For example some years ago i was starting on restoring vacuum tube equipment and was struggling to understand some theories...i had to read lots of books and watch videos until i realized the "miracle" that going out of a tubes anode there is dc voltage and the ac signal riding on it on the same conductor...Nobody explained that on these simple words.....nobody stated that AT ALL....before, i looked at schematics and was puzzled to see +200v entering on a point where it was supposed to be a 10v ac signal exiting..... i also could not find the waveforms on my scope because they were "raised" by the DC offset

@mvd2161950 5 жыл бұрын

8:35

@egertondidikallay9449 5 жыл бұрын

Honestly you are a Masterclass. I have just realized something I never thought about my entire life as an electrical engineer. Thanks a million and God richly bless you.

@Mirandorl 8 жыл бұрын

Your opening comments about how engineering is taught could be the topic of an entire channel. Throughout my university time I always felt this way, and so did the others in my class. The amount of times we would have lectures by professors and be confounded by derivations, only to have a tutorial class with a phd guy who would say "look, ignore all that, its just this" and explain it in physical terms. The whole class would just go "why didn't Prof. Confusing say it like that? That's simple". Then the maths would make sense and build on it. You still learn it but it takes half the time and gives a much deeper intuition.

@darwinthompson391 5 жыл бұрын

Absolutely agree.

@DumbledoreMcCracken 5 жыл бұрын

I'm convinced there are people who are uncomfortable with the physical world, but are entirely happy in the axiomatic world of mathematics. They can only speak the language of mathematics, and see only the mathematics. Mathematics is only a language, in the same way Swahili is a language. Someone could explain the physical world to you in Swahili, and eventually you'll understand something, but it will be painful. If you think in pictures at all, you need something physical to relate to. Even Richard Feynman, the Nobel prize-winning physicist, thought in pictures

@berryj.greene7090 5 жыл бұрын

All to do with tradition. The error of intelligence assessment. We have to change this. Grandstanding & parading a gift for memory is NOT teaching is it? Nor is it actual understanding. In many instances (maybe all) the maths & formulas came second NOT first. Yeah of course they help but lets get a grasp of why they're needed first - then work out the form they have to take. Then we have understanding.

@Decrosion 5 жыл бұрын

TheDroidBay wouldn't be surprised if it was intentional tbh

@richardcranium5839 4 жыл бұрын

the harder you have to work at something the longer you'll remember it. its human nature. sometimes its best to get everyone confused and baffled then back off and take another angle. something easily learned is something easily forgotten

@mikeschotte9480 4 жыл бұрын

Boy, you’re taking me back to 10th Grade Electronics. Shocked at how much I actually remembered, 39 years later.

@lekoman 12 жыл бұрын

I absolutely love that there are people on KZfaq like yourself who are working to contribute to the layman's understanding of these things. I can watch videos like this for hours. Thank you so much for taking the time to record, explain, and edit all of these for us. It sounds effusive... but it's people like you who make us all smarter, and the world a better place.

@Afrotechmods 13 жыл бұрын

Flawless!

@hadireg 4 жыл бұрын

👍👍❤

@Hrostbjergsorensen 3 жыл бұрын

No its not flawless. he said at 1:29 that a wall outlet can provid 100000 amp..... thats not true. unless he is close to a every big transformer close to a nuclear power plant. he would max get around 500-1000 A in a short circuit

@nikkolp640 3 жыл бұрын

@@Hrostbjergsorensen lightening ?🙈

@seanburton6007 3 жыл бұрын

@@Hrostbjergsorensen Hundreds OR thousands!

@Willam_J 6 жыл бұрын

@1:19 “Don’t do this, by the way.” -- ElectroBoom would do it!!!! :-D

@Nicedesk 2 жыл бұрын

Thanks! Been working with electricity for 30 years for audio applications. Thanks to you I finally understand Z.

@klmkt4339 2 ай бұрын

This was available from 12 years ago

@tabliqatchi6696 18 күн бұрын

You are a gift to the humanity, I always read those academic definitions and scratched my head, but this video was a GEM!

@wb5rue 5 жыл бұрын

Great video! I learned a different analogy for the capacitor. Think of it as a tube/chamber with inlets at each end. In the middle of the chamber is a plunger that can move back and forth. When water enters one end the chamber fills with water and the plunger is pushed along until it reaches the wall at the other end and it stops, the capacitor is fully charged and no more current/water may flow (assuming a perfect seal/capacitor which we know doesn't exist). When the current changes direction the pressure (current) pushes the plunger the other direction until it hits the other wall. This is repeated as the AC current flows back and forth. The value of the capacitor can almost be thought of as the volume of the chamber but not quite. Keep the videos coming!

@user-rh4qd6se9n 2 жыл бұрын

I love this analogy!

@els1f 4 жыл бұрын

What you said in the first 30 seconds is 100% accurate! It's like so much of the school curriculum is designed to destroy the joy and wonder that motivates the internal desire to keep learning. The endless hours of practice problems NEVER forced an idea into my memory longer than to take a test. But, when a physics experiment explained the concepts of an occurrence I took for granted, I would remember it forever.

@GospodinJean Жыл бұрын

That is called Prussian education. Read about it. A system designed to create "a flock of timid and industrious animals, of which the government is the shepherd"

@frankpitochelli6786 3 жыл бұрын

I subscribed, I've been in electronics for 40 yrs, and your explanation of impedance actually taught me something, when I was taught impedance theory, it was always made more complicated than it had to be. Ty for your explanation and taking time to explain it properly.!

@formosabrowning3539 3 жыл бұрын

Its one of the best explanations I've witnessed in my life. So many technicians do not grasp this concept of Xc and Xl

@JusticeAlways Жыл бұрын

I just now fully understand it...impedance has always been a bugger for me. April 7 2023 👍

@dproduzioni Жыл бұрын

As a teacher myself, I love how kind, efficient and poetic this guy is. Another job well done! Keep up the good work!

@moussafiradil1700 3 жыл бұрын

9years later this video is still as helpful as in J1, I can only imagine how many students/ hobbyists you've helped across the years... thank you very much in the name of all my comrades !

@JusticeAlways Жыл бұрын

Another 2 yrs later from your post...this presentation taught me the fundamentals of impedance! LoL! I wonder....somebody 25 yrs from now have the same experience? 😄

@opitts2k2 8 жыл бұрын

BRILLIANT!!! Best darn tutorial tube on this topic yet!!!

@Nickademus77 7 жыл бұрын

Can confirm, LEDs explode when plugged into an outlet. Christmas lightbulbs, however, tend to shoot across the room.

@michalob21 5 жыл бұрын

Lol

@taunteratwill1787 5 жыл бұрын

Saw the movie about that "christmas killer tree" awesome!

@godofplumbing 5 жыл бұрын

Great, now I have to try it.

@berryj.greene7090 5 жыл бұрын

Ha! Ha! All you need to do now is come up with a peaceful use for your discovery! We will need formulas for trajectory and range!! I can provide the targets!

@DispennetteArtworks 4 жыл бұрын

🤣

@hugocapparelli1253 4 жыл бұрын

Man! I love how simply you explain this concept. Thank you!

@professoreggplant9985 4 жыл бұрын

Your end note was revelatory. I've reviewed the same things such as this since I learned it decades ago and you gave me another 'a-ha' moment here on inrush currents that just never clicked before. Thank you!

@Yorumcu63 2 жыл бұрын

Best Reactance and ımpeance tutorial video in KZfaq . Only one LED ,2 resistor ,one capacitor ,one wattmeter and 1-2 page and great knowlodge Thank you

@RealationGames 10 жыл бұрын

Thank you very much! Excellent analogies and explanation. Finally I got this figured out.

@arizona111 2 жыл бұрын

Superb! Never had a full grasp on impedance. In one second you cleared it up! "Impedance is just a resistance that depends on frequency"

@grincherick 9 жыл бұрын

I really respect people that take their time and invest it to help people like you do. Thank you very much.

@michaelcostello6991 8 жыл бұрын

Really good video on impedance and effect on power usage. Excellent introduction demo. Thanks a lot.Michael

@stupossibleify 7 жыл бұрын

This video has everything! I was always confused by impedance. And you've also explained how low voltage equipment can be powered from the mains without a transformer

@ECOMMUSK 8 жыл бұрын

I have been learning it backwards in class. This is really good reinforcement for what I had to learn the hard way in labs. You can never know enough. Thanks!

@joshmonroe3224 10 жыл бұрын

Finally a clear, concise explanation. Thank you.

@Gmtail 7 жыл бұрын

Your video made the light go on in my head. It's been many years since I was in school and learned about reactance, however I couldn't quite understand why I was doing it. Thank you for the ah ha moment sir..

@ShajeeJurangpathy 10 жыл бұрын

Dude you rock!! Stuck on this topic for months now... so much better now that i understand :D

@Eldser 4 жыл бұрын

This is by far the best explanation I've ever come across for impedance!

@vex9596 4 жыл бұрын

This video is pure gold. Very clear and on point, thanks!

@willyrivero470 5 жыл бұрын

Finally a real clear explanation. I get it so much clearer now! I'm a happy and satisfied subscriber. Thanks so much!

@otakucode 11 жыл бұрын

Thank you very much for making a video that addresses pretty fundamental electrical ideas. I'm a programmer and I understand computers down to the level of logic gates, but have always had trouble with circuits but have always been interested to learn. You're quite a good teacher and going from practical to theory rather than the other way around seems to have been a great idea!

@circuitdesign 9 жыл бұрын

Nice vid. I have an MSEE in analog design and work for one of the top semiconductor companies in the world and have 20 years industry experience. I still learned a lot from the video. Great explanation. I wish the professors in college took this approach of looking at things from a practical side first, then building the math concepts up around that. The knowledge sinks in much better.

@berryj.greene7090 5 жыл бұрын

Look how many comments are praising this presentation. It just demonstrates how wrong it often is.

@damirdze 5 жыл бұрын

What is exactly that you have learned from this presentation? ( After 20 years of the experience with electronics)

@martinmartinmartin2996 4 жыл бұрын

Diodes in a power supply are often connected directly to huge capacitors (10,000 uf) the in rush current can burn-out the diode if the a low resistance transformer is turned ON; with the the diode connected to the transformer AFTERWARDS !

@JusticeAlways Жыл бұрын

@@martinmartinmartin2996 Oops!😄

@larrykent196 2 жыл бұрын

Teaching from the practical backing into the math, well done. Thank you for the video. You inspire others and everyone learns. Any insight is always worth the time. Cheers!

@timquadrat70 5 жыл бұрын

Finally I understood the concept of reactance, impedance, power factor, watts vs. volt amps etc. Thank you so much! Bw. your channel is one of my top favourites!

@ec11368 2 жыл бұрын

Thank you very much for all of your effort and your precious time to show things in practice. I really appreciate it.

@evugar 10 жыл бұрын

Wow! Thanks a lot, this is one crystal clear explanation. You have some talent, Ben! Wish you could do more of these basics.

@CaesarCapone 2 жыл бұрын

This guy's channel was my favorite. Being also subscribed to Applied Engineering, I had wondered where A. SCIENCE has gone. I didn't realize his channel has been around for this long!

@dbuezas 10 жыл бұрын

Great teaching! Now it's crystal clear. Thanks!

@johneagle4384 2 жыл бұрын

11 years in the future and your tutorial is still super! Thank you.

@m8onethousand 4 жыл бұрын

Nearly 10 years later and getting my mind blown with such a clear explanation that makes perfect sense.

@tatterdemalion898 Жыл бұрын

I am rewatching this vid after some years, cause i need the info for a quick project. This and part 2 are gold on the internet! Thank you again for sharing this info!

@sohailanjum4997 10 ай бұрын

Thank you so much to explain a difficult topic in such a simple way. A lot of experts are not good teachers. I am amazed that I found your video after 12 years it was poosted. Amazing. Thank you again.

@52Warlock 5 жыл бұрын

Now hooked on your videos. You do such a professional job of presenting the topics without being a know-it-all and talking above the students heads. Excellent.

@gcm4312 8 ай бұрын

I get happy when I search for a topic and I see you've made a teaching video :)

@teslastellar 5 жыл бұрын

Thank you for your great videos and explanations. I'm always amazed by the depth of your knowledge and how you can explain complex concepts in simple terms. Keep up the good work!

@OzModIaZ 6 жыл бұрын

Finally, a video about impedance that is simple and easy to understand. Thank you very much for your contribution sir!

@bellznuthin 9 жыл бұрын

oh the great joy you feel when you finally understand. Thank you

@lucadelaat8837 6 жыл бұрын

Finally someone that can give an intuitive explanation! Thank you!

@proxypeople730 3 жыл бұрын

your a walking legend i will happily donate my money to you i wish you made more videos

@tigerseye73 3 жыл бұрын

Great presentation. Was taught electronics years ago in Navy, but you have a way of making this much easier to understand.

@DigitalAndInnovation 5 ай бұрын

I have been trying to find this video! I watched it maybe 10 years ago and it was such a great demo!

@dumeinar 11 жыл бұрын

This is really good. So far the best basic description of impedance I have encountered.

@keyboardjedi 9 жыл бұрын

Hands-down the BEST explanation of multiple (closely) related concepts in clear, concise form. I thought I understood the impedance concepts, but this has expanded my knowledge. +1 for the practical demonstrations that serve to convey these difficult concepts in a way that is easy to understand. As they say, a picture is worth a thousand words. Thank you.

@ilgnsogut3715 4 жыл бұрын

That is a perfect explanation. Practical, handy and a perfect way to teach. Love that. Thank you very much.... Keep it going.

@JerryEricsson 3 жыл бұрын

Cool indeed. I love learning more and more about how electrons behave in circuits. The only problem is, I am rather sleepy, and dozed off, only to awaken for the end. You see yesterday we buried my wonderful wife, who lost her battle with cancer a few days ago and without her beside me, after 51 years and 4 days, well sleep does not come when it should at night, my mind races from our first words when we met to her last words to me a couple days ago. At any rate, thanks a million for the info and the wonderful bit of sleep I really needed that.

@MothrilEroan 5 жыл бұрын

You sir, just explained a concept brightly that I was having a hard time to comprehend. Thanks a lot.

@TheManzico 2 жыл бұрын

Just want to say Thank you for this clear concise explanation of circuit analysis!!

@11rmax95 7 жыл бұрын

Thank you so much for your video. I took an entire college circuit analysis class and didn't learn that much

@ChrisWilson999 5 жыл бұрын

Once again you astound me. I've never heard a good explanation of impedance before and you made it simple! I'm guessing that's because you're the only person I've heard explain it that actually understood what you were teaching. Superb!!

@Mrhvac 3 жыл бұрын

This was the absolute best explanation of impedance that I have seen. I think I got it but I am now on to part 2. Thank you.

@PiroMat15 4 жыл бұрын

Man, this topis bolwed my mind every time, when I trying hed repaired some old Cd-Players. I mean I touched some problems about earphones impadance and i have passed my electrical lectures on my engineering studies, but now i know for what impedance is andy how valuable it is :D Thank you soo much.

@guanilee 5 жыл бұрын

After all these years I suddenly and totally understand the reactance and the impedence. Thanks so much-- for the long-over due aha moment that I just got.

@cyndik8886 6 жыл бұрын

Literally the best video ive found on this subject. thank you kindly

@videogametips5604 3 жыл бұрын

Best explanation of impedance and reactance I've ever heard!!!

@mohammadmoinulhaq2501 6 жыл бұрын

Wow ! The mystery of many days just dispelled in 16:07 minutes ! Thanks a lot for such tremendous tutorial. I earnestly hope you will continue making lot more contributions like this. Just wonderful work..

@BPantherPink 5 жыл бұрын

Finally understood in-rush limiting resistors... THANK YOU... EXCELLENT explanations with a very soothing voice ‼️

@ian6083 2 жыл бұрын

This is like gold. Thank you so much and keep up the great work!

@warrenvanwyck2765 3 жыл бұрын

Great combination of theory and actual laboratory demonstrations -- a welcome contrast to the endless chalk talks.

@VahidBehravanVahid-Behravan 5 жыл бұрын

Turning a LED with Ac was my first chalenge which I tasted as I start with electronics, you made it so clear for me, I've learned a lot. I wish to see your tutorials continiously. Just give your amaying knowledg to the world, because that one of the things you do just perfectly. Thank you!

@recklessroges 5 жыл бұрын

Such a good explanation of, resistors and capacitors and even in-rush currents, (and how they are mitigated, and why.)

@dipi71 6 жыл бұрын

Excellent, thank you for this practical and hands-on approach. Cheers!

@Samrajel 3 жыл бұрын

Whole water pump analogy made me understand multiple things at once. Thanks mister!

@benjaminscherrey1124 5 жыл бұрын

Excellent introduction! Best example I've seen on the subject.

@AnthonyFrancisJones 4 жыл бұрын

Excellent! Well explained with an excellent demonstration. Perfect teaching - thank you for this.

@murdoch817 6 жыл бұрын

Nice, your making a potentially complex topic very easy to understand. Much appreciated. Keep'em coming.

@chrismelcher1528 8 жыл бұрын

Very informative, easily followed & understood. Thank you for sharing your knowledge.

@Bob3519 8 жыл бұрын

Very easy to understand the way you presented it.

@gregsuarez5205 Жыл бұрын

So nice. I absolutely love your teaching style. Starting with example and working backwards towards the formulas really helps me ‘get it’ . For once I can say “ I understand what’s happening “ and gives me some areas to further explore . Thank you so much . Thumbs up and subscribed!

@liamthompson9342 2 жыл бұрын

Super helpful video. You're absolutely right, I've read technical definitions numerous times but I wouldn't have been able to construct this circuit which I now understand.

@coltx64 3 жыл бұрын

I just found you channel, this is the best teaching I have seen my hole life including that I went on school for electronics and eclectic thanks!

@twlson49 7 жыл бұрын

This guy is excellent teacher and does excellent videos. Keep it up dude. Love your videos.

@min2oly 9 жыл бұрын

This is an excellent video full of awesome information! Thanks!

@carentanbr 4 жыл бұрын

Great video. Thanks for sharing. I like the inrush explanation too, it never made so much sense before.

@pfabiszewski 4 жыл бұрын

The best video on this subject! As U said - most people talk about it backwards.

@dajapester 3 жыл бұрын

Absolutely fantastic explanation. Succinct & taught from the problem you want to solve first, then the explained solution. Thank you for your great work.

@wangarooi 3 жыл бұрын

impedance is just the combination of the pure dc resistance and the ac resistance...effortlessly explained one idea flowing into the next.

@gopronomad4381 5 жыл бұрын

Well explained. fully charged capacitors are infinitely resistant.. best explanation ive ever heard

@MrEinstain 10 жыл бұрын

enlightening tutorial, i've been struggling with this for a while now, many thanks

@tulius01 11 жыл бұрын

Thank you very much for this tutorial it helped me quite a lot to understand impedance. I'm currently preparing for my Ham Radio license exam and your video made things easier for me, thanks again.

@fragglet 4 жыл бұрын

Went through a whole CompEng degree years ago and never understood impedance. Finally a clear explanation. Thanks!

@cbranalli 4 жыл бұрын

as an electrical engineer who has pored over these formulae for very many hours - i an very pleased to hear your lucid and elucidating explanations of what's going on and why.

@vsmart5744 4 жыл бұрын

Incredible teaching! He left no doubt about what is impedance. This is the first video I've watched from his channel. I think I'm going to be scientifically enlightened after going through his channel and watching his videos. This is what 5 star teaching is.

@Mr.M1STER 6 жыл бұрын

Great video. Very informative. I like the water/bucket analogy for the capacitor. Very good.

@sawyerandjackfucking 10 жыл бұрын

Thanks for this video Ben. Very well explained!

@arturgheorghita4157 2 жыл бұрын

Oooooo man, I have no words to thank you, 2 years I tried to understand what you just explained in few minutes, god bless you.

@erin19030 4 жыл бұрын

I must say ,a very clever demo. I taught for years but your approach never occurred to me. For some of us electronics came easily and the old methods of teaching were good enough. However we were deeply involved in mathematical modeling too. Math was a language we understood well and all physics theories were explained through math. We referred to that inrush current as surge current.