Started playing this video and my 22 yr old software engineering major daughter sticks her head in the room and says "Is that the new video? I watched it this morning." WHAT?!?!?!?! I asked her what got her into watching EEVBlog and she said said some video had been recommended and she just started liking how Dave teaches and especially how he draws things out (DaveCAD) so it's easy to visualize. LOVE THAT KID!!!!
@lordjaashin
3 жыл бұрын
cool story, bud
@MikeJohnMentzer
3 жыл бұрын
Btw what got you into EEVblog
@arthurmead5341
3 жыл бұрын
Did not happen
@FARLANDER762
3 жыл бұрын
@@MikeJohnMentzer Don't recall. I'm sure YT recommended it for some search I did and it looked interesting.
@FARLANDER762
3 жыл бұрын
@@arthurmead5341 Damn sure did
@Waseem0071
3 жыл бұрын
This one video is better than my 4 year Bachelor Degree in Electrical Engineering
@designdigitalarchitecture
3 жыл бұрын
Just like to say a huge thank you for your education. All you work is so apricated, so thank you.
@lvxleather
3 жыл бұрын
I second that. I've been watching the channel for years but have been binging on the crazy Aussie bloke for the past few weeks. I've learned a quite a bit, and also some pretty funny sayings. Bobby-dazzler!
@abhijithanilkumar4959
3 жыл бұрын
@@lvxleather Such an underrated channel!
@57dent
3 жыл бұрын
As usual Dave really interesting and well explained video. A great reminder on a lot of the theory detail that I'd forgotten! I'd really like to see a similar video on three phase power, (edit - realized I did not word correctly!) What I meant was how single phase can get converted to three phase. and the equations behind it!
@n2n8sda
3 жыл бұрын
Mmm AC.. I hope this carries on down the rabbit hole into pros and cons of HFAC vs HVDC at some point! As for ripple, good on ice-cream not great in a DC circuit :)
@bradpalmer2914
3 жыл бұрын
Raspberry ripple for Ice Cream, smoothing Capacitor for DC. Don't mix them up the electrolyte is nasty 😂
@michaelbarakat6095
3 жыл бұрын
"Thank you very much" the least to be said for this effort Mr. David💖
@SamTheMasterDragon
3 жыл бұрын
Thank you so much for this, been struggling to get into the nitty gritty of AC power. Messed around a lot in Desmos to understand the angles but with those extra equations, it clears a lot of questions up. Thank you again for this video!
@hadireg
3 жыл бұрын
I feel good whenever I see that casio calc there!! :)
@thomasgaliana6288
3 жыл бұрын
I can't wait for what is to come! Two thumbs up!
@johnpeterson7264
2 жыл бұрын
Wonderful ! Thank you so much for posting !
@notacucumber7617
3 жыл бұрын
Dave thank you! I'm so lack of your fundamentionals videos. It's been so cool, if they will be more deeper and often.
@CezarVideoBlog
2 жыл бұрын
Thank you, well made, amazing teaching skill !
@paulleitner8726
3 жыл бұрын
Thank you for these series
@jimle22
6 ай бұрын
I was always taught that the DC volatage with ripple was called pulsating DC.
@minus3dbintheteens60
3 жыл бұрын
I love these videos. I hope a future video can help explain power factor
@kuadidzv8726
3 жыл бұрын
thanks for the very nice explaination 😎
@KeritechElectronics
2 жыл бұрын
Nice to repeat some theory, though 2πf is a lowercase omega rather than w. Wondering if RMS shouldn't be in fact named SMR :) Integrals... ugh, I'm bad at math, okay? LOL. Suffice it to say that I failed my electronic engineering studies at the technical university because of calculus. Makes me wish that at least some teachers there were as passionate and humorous as you - it would be a pure pleasure to study! Lovely Casio VFD calculator too! These teeny weeny numbers are so damn cute. I was expecting an Electroboom meme at 26:35, haha :) and the cameo appearance of your son was real cute too! With an awesome dad like you, he'll be an electronic engineer in no time.
@stub1116
3 жыл бұрын
I enjoyed this video!
@wchen2340
3 жыл бұрын
Hey can't leave me like that. I want that part 2 right now.
@MikeB_UK
3 жыл бұрын
Dave, having shown off a succession of pocket computers in this, how about a quick video show and tell of them? Do you actually make any use of any of them ?
@RixtronixLAB
3 жыл бұрын
Nice video, thanks :)
@n3r0z3r0
3 жыл бұрын
Actually it is more efficient to transmit power on long distance in DC form instead of AC, and it is done in many places already.
@manu808
3 жыл бұрын
Magistral !!
@okaro6595
3 жыл бұрын
10:17 Nice how the calculator suddenly changed.
@tojo3D
3 жыл бұрын
My bet is on Sagan! :)
@devillian2
3 жыл бұрын
"YOU DON'T SIMPLY UNDERSTAND AC CURRENT" is what his gesture in the thumbnail is somehow makes me think ....
@kissingfrogs
3 жыл бұрын
I am going for 637 for effort and enthusiasm
@stephenwong9723
3 жыл бұрын
Sure, thumbs up for your son! Bravo! 0.637!
@marcoantoniodasilva9969
Жыл бұрын
Tks 😊
@DownTownDowns
3 жыл бұрын
Anybody else unable to see a Davey video and not go: "haiiiiiiiiii" in that Queensland accent lmfao
@packratswhatif.3990
3 жыл бұрын
Yes, thanks Dave, wish I had a better understanding of this when I was back in high school (1972). Now I know why I ONLY became an electronics technician instead of an electronics engineer …… dumb as a stump.
@stark9397
3 жыл бұрын
Is there an EEVBLOG discord channel?
@YouKnowThisBoy
3 жыл бұрын
If one node sources a DC pulse (+5V) and a second node responds by sourcing a DC pulse (+5V) on a single net, is that AC?
@IsrarAli-kc3pe
3 жыл бұрын
Dear Sir, I am your follower on your KZitem channel, kindly guide me about my Rigol DG2041A function generator. It was after shown a message on screen (overload waveform), and suddenly disable square and pulse waveform at output terminal but showing voltage on output terminal except waveform and other all waveform are properly appearing on output terminal, so kindly guide to me that, how can enable square wave and pluses wave on output terminal? If you have schematic diagram or other any salution in this regard kindly guide me. Best Regards Israr Ali
@ionelvranceanu6413
3 жыл бұрын
A squarewave signal, 0-5 v amplitude, 50% duty cycle. AC or DC, and why?
@minus3dbintheteens60
3 жыл бұрын
Dave said if it's a repeating pattern its AC
@stimie
3 жыл бұрын
If you have 1 cycle it "was" AC.
@ovalwingnut
3 жыл бұрын
Is it true that: AC is "non-binary" because it "swings both ways"? Asking for a friend mind you... btw. ELEcTriFinG Instructional video... Yep! (going in the pool room). Cheers!
@robertbox5399
3 жыл бұрын
What the F transforn of that squiggle in the middle?🤣
@awxomexd
2 жыл бұрын
Where can i buy that shirt?
@erikdenhouter
3 жыл бұрын
"You cannot put a DC on an antenna and transmit a signal..." That is not fully true. That is where it all started, the spark-gap transmitter. Making a spark with a high voltage, and repeat it as short pulses. en.wikipedia.org/wiki/Spark-gap_transmitter
@EEVblog
3 жыл бұрын
True. Effectively a DC to broadband AC converter
@mrlazda
3 жыл бұрын
Storig large amount of AC is much easier and cheaper then storing DC. Even communist here managed to build AC storage 40+ years ago that have 4 times more power and 10 times bigger capacity (and that is small compared to newer ones) then biggest DC storage planed in 2021.
@ryoandr
3 жыл бұрын
AU/DU
@mopar3502001
2 жыл бұрын
"None of that 60hz yankee rubbish" LOL!
@CarAudioInc
2 жыл бұрын
welp, I've never watched a 'basics' video and felt more like an idiot lol
@myhobbies5965
3 жыл бұрын
Can any body help me in Assembly code modification for AVR 8bit microcontrollers used for BLDC motor control driver(ESC)?
@DarkMatterX1
3 жыл бұрын
Why assembly, just out of curiosity?
@myhobbies5965
3 жыл бұрын
@@DarkMatterX1 actually I got it from an open source and want some modifications for my hardware prototype.
@myhobbies5965
3 жыл бұрын
@@DarkMatterX1 I an not good in coding. I started to learn Assembly and made some basic modifications, like pinouts as per my requirements. But still not good in coding to do more modifications.
@DarkMatterX1
3 жыл бұрын
@@myhobbies5965 I gotcha. I can't help you with assembly. Honestly I think you're gonna be hard pressed to find the help you're looking for. Assembly's not a very popular or common practice these days.
@Ozonised
3 жыл бұрын
Try the AVR freaks forum. You can ask all your AVR related questions there :) Hopefully someone there might help you out
@genkidama7385
2 жыл бұрын
neh
@bertblankenstein3738
3 жыл бұрын
Keep him honest Sagan!
@ianbertenshaw4350
3 жыл бұрын
“You’re never gunna escape AC” -someone should have told Edison that 🤣
@onradioactivewaves
3 жыл бұрын
He probably told that to his victims, just prior to electrocuting them.
@MrDoneboy
3 жыл бұрын
Tesla tried to!
@theharbingerofconflation
3 жыл бұрын
"As you can see now this Cat is fried" "Okay weirdo, I already told you I won't buy your overpriced lightbulbs!"
@user-mr3mf8lo7y
2 жыл бұрын
He would not understand.. He was a businessman not a scientist. He wanted to get direct profit not alternating one. Thanks Dave..
@omniyambot9876
3 жыл бұрын
thank you so much sir. I rarely comment on your videos but now I'm getting college I will take electrical engineering and you always stimulate my mind. I love your videos and I almost watched everything. I've watched you since I'm 10 years old!!
@omniyambot9876
3 жыл бұрын
also I have like your recommended test equipments I always save for used ones
@DarkMatterX1
3 жыл бұрын
That shot of Sagan at 33:35 is the best part of the vid.
@bertblankenstein3738
3 жыл бұрын
Lol
@cannesahs
3 жыл бұрын
Pure meme
@AndrewSkow1
3 жыл бұрын
10:30 The Metric System is some weird French thing that you use. 28:11Sagan is technically correct, which is the best kind of correct.
@petergoose8164
3 жыл бұрын
Metric is something we all use directly or indirectly. The indirect way is just more complicated. en.wikipedia.org/wiki/Pound_(mass) and en.wikipedia.org/wiki/Inch.
@colejohnson66
3 жыл бұрын
@@petergoose8164 no. Only the French use metric. That’s what Andrew said
@petergoose8164
3 жыл бұрын
@@colejohnson66 Where did he say that? If he had said that how do YOU explain that the Ford Mustang uses mostly metric bolt and thread sizes. "Le Mustang"?
@williamsquires3070
3 жыл бұрын
The new law says “e” (the induced stress of drivers on the motorway) = “B” (the flux density of Teslas on the motorway) x “L” (the length of the motorway) x “v” (the average velocity of all Teslas on the motorway) x “c” (the percentage of Teslas which have caught fire and become charcoal briquettes)!
@jenniferwhitewolf3784
3 жыл бұрын
🤣🤣🤣🤣👍👍👋🏻👏👏
@Artopiumcom
3 жыл бұрын
Whaaa!?! I'VE BEEN WAITING YEARS FOR THIS VIDEO!! THANK YOU!!
@EEVblog
3 жыл бұрын
Better late than never.
@Artopiumcom
3 жыл бұрын
@@EEVblog 😍
@triode3582
2 жыл бұрын
Please do more of these videos. You're a great teacher! :D
@NoLandMandi
3 жыл бұрын
Sagan is correct.
@MrSvetlin09
3 жыл бұрын
Inductor is just a hairy resistor 🤣🤣🤣
@PointReflex
3 жыл бұрын
Man, I sooooo missed those fundamental episodes. This is the stuff that belongs to a class room.
@samjones1954
3 жыл бұрын
Would be much better for the ordinary people to not try teaching the engineering course on magnatism. I am a Tech from the the best electronics school in Canada, RCC. Your confusing me. Stick to AC and not magnatism
@viperidaenz1
3 жыл бұрын
Are you sure peak current from the generator is not at the top and bottom, where the wire is moving the fastest through the field between north and south? Down at 90 and 270 degrees the flux density isn't changing is it?
@rrb6544
3 жыл бұрын
Great collection of calculators Dave ;)
@Basement-Science
3 жыл бұрын
The highest AC transmission line voltages these days are actually 1.2 MV btw. First used in India alongside 800 kV DC.
@EEVblog
3 жыл бұрын
Crazy!
@kissingfrogs
3 жыл бұрын
Wow
@neglectfulsausage7689
2 жыл бұрын
Try waving a car antenna around below it during a rainy day.
@olipito
3 жыл бұрын
You didn't explain why it converges to sin when you put whatever into the filter. New video?
@gregorymccoy6797
3 жыл бұрын
Sagan is running the numbers behind the scenes and ready to call shenanigans, if necessary.
@stevedaenginerd
3 жыл бұрын
Thank you for reminding me how much I forgot! 😲🤣🤓 Thank you for all that you've shared over the years! Glad Sagan decided to get in on the fun and use maths to take the wind out of your sails! Lol 🤣
@TheRealBanana
3 жыл бұрын
9:27 I think a single cycle of AC can be described as an infinite series of AC waves that all sum to that single cycle, and those are all proper AC. So I'd say its still AC.
@marcdraco2189
3 жыл бұрын
Thanks for all of this Dave - I quoted you when I reviewed the Rigol 1074Z recently, only I spelled "come a guster" incorrectly. Until recently I'd been given to understand that inductors are *coils* but now (d'uh) ANY current through a wire is caused by a magnetic field (or is it the other way around or is it simultaneous) which why all components and even our PCB wires have a certain amount of inductance which can cause issues at very high frequencies! Damn my basic science and lumped component models. Back to skool (sic) I guess...
@derekloudon8731
3 жыл бұрын
I love your enthusiasm. I wish that you were around in the late 60s/early 70s when I was learning electronics 👍
@sanjayvora5986
3 жыл бұрын
I fall short of words when I have to say thank you thanks for all your hardwork knowledge and all the incredible work and effort which goes into making these video . I respect you sir and wish for your long and healthy life .
@ebbewertz3417
Ай бұрын
to debate the naming defenition of AC, in dutch we have a name for everything: - DC - periodic DC - Constant DC And only when a wave crosses the x-axis ( = switch its current direction), it's AC. Then u have: - "Alternating current" (can just randomly switch current direction) - Periodic alternating current - And when avg=0 and its fully symmetrical, then its one word directly translated : "alternationcurrent"
@DrB1900
3 жыл бұрын
Another advantage to sin waves is you can combine any two at the same frequency, but any amplitude and phase, and you still get the same frequency out (just phase shifted).
@onradioactivewaves
3 жыл бұрын
Say what, you sure about that?? I for example they If they are in phase they have constructive interference - no phase shift but definitely has an amplitude shit.
@fersunk
3 жыл бұрын
Mmm, if you want constructive interference in a sinusoidal wave you need both in phase, so they add their amplitude. That's how you get 240VAC in USA, you use two 120VAC lines phased out 180 degrees
@ct1igu401
2 жыл бұрын
One of the BEST explanations of AC measurement I've seen - Thanks
@markuskivisto1425
3 жыл бұрын
@33:14 Vmax=Vp-p or just Vpeak?
@krzysztofkozowski5375
Жыл бұрын
When calculating the RMS by integral of squares, the 1/T period should be cast away the root - I think... Thank you for GREAT tutorials. It's sad that university lectures aren't that at that high level so often. Your language is also easy to understand even for noobes ;) KEEP IT RECORDING...
@thece5511
3 жыл бұрын
AC-DC terminology is a mess. VAC (voltage alternating current) does not make any sense, but its meaning is understood by everyone. I think the most accurate term is Alternating Voltage or at least VRMS, indicating that we are talking about a non-constant voltage. Fun fact: in Greek "direct current" is translated to "continuous (συνεχές) current" which makes zero sense. I mean, a sine wave is continuous... Another black hole is that of characterizing a wave with both AC and DC components. Is the wave strictly positive? Technically it is DC, but can comprise of high valued AC components (eg 1+sin(ωt) or sin^2(ωt)). What if the wave has both positive and negative values, but with a DC offset (eg 1/2+sin(ωt)). We can name both cases as "AC with DC component" but I think that this really depends on the application.
@matthewellisor5835
3 жыл бұрын
Agggh! Did anyone else have an existential-rounding-error-crisis around 10:43? Well, it's close enough to pick up a thing and put the thing onto some other thing. (Show me again, those ∆v calculations, please.) "Correct within _some_ order of magnitude." was my fourth-favorite teacher's way of saying "wrong" while preserving face for his student while publicly deducting grade-points. *Edit* Good job youngin' on keeping the 'Old Man' straight. I should have watched it all through before running my trap.
@shmehfleh3115
3 жыл бұрын
I used to stick stuff in outlets all the time, and I never got shocked. Now I know why: I was using the average, not the RMS.
@petersage5157
3 жыл бұрын
It's rather distracting how the confuser under the whiteboard keeps changing. I especially like the slide rule. AC is respective to a fixed voltage reference, thank you, the end. Doesn't matter if that reference is O VDC or 500 VDC. This is why, in choob amps, HF snubber capacitors can go to either circuit ground or HT and be equally effective, and why "lifting" the filament supply is an effective way of getting filament hum out of the audio signal.
@Croz89
3 жыл бұрын
Am I correct in saying most modern generators put the magnets on the rotor and have the coils on the stator, so the magnetic field rotates instead of the coils? So you can do without the slip rings.
@MassimoTava
2 жыл бұрын
If you wanted to share your two cents on AC power regeneration and how it affects audio, check out the audio science review vs PS Audio fiasco. It’s about the os audio powerplant 12 $5000 ac regen unit.
@rosskrt
Жыл бұрын
I have a weird question: if you have 10mHz AC, is it still considered AC? I mean, by the definition yeah of course, but in the real world? Do transformers still behave like in normal AC circuits or does the low frequency affect that?
@Blackmuhahah
3 жыл бұрын
It's neither AC nor DC. It's NCC (Non Constant Current). Not to be confused with NCV. Which is obviously Non Constant Voltage. And not "Net calorific value" as wikipedia has you believed.
@CoolDudeClem
3 жыл бұрын
Maybe I'll start the flame war. The way I see it, DC with ripple is bascially a bit of AC riding on top of DC.
@primus711
2 жыл бұрын
Nope for ac needs to stop and reverse direction dc with ripple is still going same direction and doesn't hit 0 point
@KD0CAC
2 жыл бұрын
Dave , or others , an idea / question and I think I have a guess . " Can not store AC " - idea is using capacitors for AC motors , they are spouse to store power [ not sure the correct term - power ] , and a general understanding of capacitors - they pass AC & block DC . So how does a motor capacitor store power for motors starting ? So my guess , the discharge is so fast [ short relative to 50 or 60 Hrz ] that the quick discharge of stored DC from capacitor , that it fits within the positive part of the AC waveform ? Any correction or confirmation .
@neglectfulsausage7689
2 жыл бұрын
Ill save you all the discussion headache. As not an EE nor an expert, the simple way to explain DC vs AC is "does the current and voltage cross the X axis, indicating reversal of either". If the answer is no, then its a DC circuit regardless of any sine waves in it. Thats why an audio signal going into an amplifier circuit is getting rectified. What difference is there if you use 4 junction diodes to rectify or you overlay a large DC voltage on top? Both cause ripples or sine waves to stay on one side of the X axis. While you're hacking up a sine wave/AC input in diode rectifying to do work, you're adding work to an audio sine wave in an amp circuit so it doesnt have to be chopped up and that signal will then work on the circuit to cause voltage changes. Thats why I like to think of amp ciruits as cloning the input signal and not as passing it along. That also makes it easier to understand distortion. A flawed copy.
@SaberusTerras
3 жыл бұрын
The fact that Sagan spotted the small maths error shows he has better math skills than most adult Americans.
@lordjaashin
3 жыл бұрын
why Americans? rest of the world are mathematical geniuses?? on the side note, here is your Chinese RMB for doing your part in "murica bad" propaganda.
@primus711
2 жыл бұрын
Where you get that nonsense from
@SaberusTerras
2 жыл бұрын
@@primus711 direct empirical evidence
@primus711
2 жыл бұрын
@@SaberusTerras are you talking about measurements because we use them all Tbh you are just being a m0r0n and have no evidence of anything
@PotatoesRnice
2 жыл бұрын
Me wants a video on AC resistance, high frequency signal, including audio, the skin effect. How to choose conductors and when it actually matters...they don't seem to do anything fancy with HDMA or ethernet.
@remyb718
3 жыл бұрын
Team Sagan!!! We don't write a number for its beauty but because it's correct :).... just add a space and some other decimals and everyone will be happy :)
@CaspaB
3 жыл бұрын
Fun fact. Edison hated AC but Westinghouse argued it was more useful as it could be "transformed" up or down to suit. This led to Edison describing those executed by Electric Chair as being "Westinghoused".
@wolfy9005
3 жыл бұрын
Just started AC, choked on DC because tldr not enough dedication with all the other workloads, hopefully ill pull enough out of AC to fix some of my crappy DC and get a pass for the class.
@WacKEDmaN
3 жыл бұрын
nice to see Prof. Sagan keeping you honest Dave! :P ...this is another refresher i needed... thanks mate...
@romanlukichev4971
2 жыл бұрын
I've heard here by far the best explanation about what RMS voltage is. I looked it on KZitem a couple years ago and videos were not so good.
@martinnyolt173
3 жыл бұрын
The Science Asylum also just released a video on AC! Not so technical like yours, but still entertaining. kzitem.info/news/bejne/mK2bs3epn5hhq6w
@Audio_Simon
3 жыл бұрын
11:25 Dave was thinking about Proff. ElectroLewin, I guarantee it! 😄
@Mr.Leeroy
3 жыл бұрын
That LT1088 is a juicy relic. I wonder if there a modern analog using thermal principle.
@aldizzle
2 жыл бұрын
Nice Doc Brown reference form "Back to the Future"!! I got it. LOL 5 minute 18 second mark!!
@garypoplin4599
Жыл бұрын
15:32 - What do you call a seasoned biker who rides a Hog in the daytime but rides a Cow at night? (Wait for it. . . . . . . . . . . . . .) ans: the Harley Oscillator!
@MrBarstow
2 жыл бұрын
Is it ac if it doesn't change direction? I would argue that a circuit such as a full bridge rectifier takes a sine wave input, and outputs a biased and unusual waveform that "alternates" between positive and neutral.
@williamwalker8107
Жыл бұрын
60 CPS is best. People that use 50 Hz failed basic math in gradeschool.
@GeorgeWMays
2 жыл бұрын
Explain to me why we love this stuff so much...! Super fun video. Appreciated.
@random_bit
2 жыл бұрын
@34:20 "this is where we run into more advanced calculus which we dont really wanna go into" sums up my entire engineering degree 💀
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