I was in an electronics class in 1988 (!) and the instructor began the topic by physically jumping up and down on the spot yelling "CEEVIIL!!" (he had an accent). He told us he did a silly thing so we would remember C.I.V.I.L. It worked. :) Thanks for these videos I have enjoyed re-activating long dormant brain cells and introducing them to new ones.
Smart folk acting silly so that we can remember it better is pretty smart. ;) I remember my teachers doing similar stuff, you remember their antics and thus you remember what they were about, and that's useful. They knew what they were doing!
Awesome video just when I needed this, been taking an electronic course online and they breezed past the "basics". They way you teach,makes me think about it logically and critically.
6:40 Nice visual representation of why it’s best to energize transformers at the peak of the mains voltage. It’s naturally where the current would be at a minimum under steady state. Really counterintuitive thing but the other way around at no voltage the core saturates for that half of the cycle and there are a bunch of current spikes until it settles down.
Brings back memories of college in the late 90s. I earn a AAS degree in electronics but not a lot of jobs in the city that I live in. Thanks for the flash back, Dave
I had loads of tries at remembering ' Ely the ice pick' or something like that, now all these years later when I don't really care along comes C.I.V.I.L so easy ! Bloody hell.
It's easier if you have any of those snazzy vintage portable supercomputers that he had on display during the video. My TI-89 helped me smoke the pot AND find X of c 😏
@@calholliYes, and the forbidden lollipops. 🤤 Lots of fun in college and grad school lol. And despite all that I still managed to get thru engineering with high honors each time.
Long time since any theory! The one quick element that might have been worth adding is that impedance of an inductor is essentially 0 at DC, and grows without limit, while impedance of a capacitor is essentially unlimited at DC, and drops without limit
I'm really enjoying this series. Been following your channel for years and I feel I've learned more than if I'd gone to school for electronics. I'm also on X now and hope to catch your posts!
An uncharged capacitor looks like a dead short, once charged, it looks like a battery which can provide a huge current (potentially). An uncharged inductor looks like an open circuit, once charged it looks like a battery that will maintain a current, possibly causing the voltage to spike dramatically.
Easier to remember what leads what by understanding what are the things we are dealing with: the voltage cannot instantaneously change on capacitor, i.e. the current builds up the voltage on the capacitor, therefore voltage will lag whatever current you apply. Opposite for inductor, where the current cannot change in an instant.
One thing to note is that in real circuits, the presence of resistance will normally mean you don't get a perfect 90⁰ shift in what seem to be simple circuits.
Hi Dave, Your explanations are super understandable. Let's talk about microphone feedback elimination with op-amps one day. Perhaps you can make it with auto noise frequency detection. 😃
Could you make a video on all metal induction stovetops, the skin effect and Eddy current heating? Can not believe how often people say aluminium and copper don’t work on induction. Would also be interesting to know why the high frequency tech is so expensive. As far as I know Panasonic brought a product to market years ago.
Years ago I confused myself just running simple tests and getting skewed results because some of the resistors I was using were simple wire-wound. Took me ages to figure out why.
I don't use c.i.v.i.l., I just remember that when you apply a voltage to a capacitor, first (time = 0) the current will be high to charge the capacitor, so the current is leading. And then knowing that it is the other way around with inductors.
Do you have these videos im a playlist? I can use some brushing up on my electronics theory and math! Also, us Yanks use ELI the ICE man to express whether voltage leads or lags. ELI= Voltage leads current and ICE= current leads voltage! Thanks Dave! Now where is the video on current flow through a capacitor or "hole flow" theory and the Impedance video? lol Thanks again Dave!
"ELI the ICE man" is a very common memory phrase here in the USA. ELI (voltage leads current in a inductor) and ICE (current leads voltage in a capacitor). Also commonly used when teaching people to pass their amateur radio license test here in the states.
I remember it like that: an inductor is a coil and the current has to run longer to reach the end of it, thus it's 90 degrees late. (This is a pure mnemonic, not a real explaination)
@@maxine_q Don't be silly.. You can go into AI right now and tell it to "create a page full of new symbols that have never been used before" --- and it could just draw random scribbled lines and create a billion different things. It's only limited to your imagination....... But for some reason, we like to use antient people's scribbles... I mean, even then: instead of Greek letters and Roman numerals-- we could throw in some Mayan and Egyptian hieroglyphs, or Chinese hanzi, or Japanese kanji... symbols are infinite.
@@calholli Now you are being silly. You want everyone that doesn't have a problem with the current system to change the working and established system and adapt to it, just because you can't be bothered to learn the difference between upper case and lower case omega.
Learnt these shit once upon a time but couldn't make a decent living by 'monetizing engineering skills' . I am one of those losers at life with nothing to my name except big flex engineering degrees that wont sell
I was in an electronics class in 1988 (!) and the instructor began the topic by physically jumping up and down on the spot yelling "CEEVIIL!!" (he had an accent). He told us he did a silly thing so we would remember C.I.V.I.L. It worked. :)
Thanks for these videos I have enjoyed re-activating long dormant brain cells and introducing them to new ones.
Smart folk acting silly so that we can remember it better is pretty smart. ;) I remember my teachers doing similar stuff, you remember their antics and thus you remember what they were about, and that's useful. They knew what they were doing!
Thank you Dave. I have to say these theoretical videos of yours are my faves!!! Cheers
best electronics teacher i ever saw
Awesome video just when I needed this, been taking an electronic course online and they breezed past the "basics". They way you teach,makes me think about it logically and critically.
35 years ago I had these classess in my technical college - these were nice times - thank you for recalling this memory for me ;-)
6:40 Nice visual representation of why it’s best to energize transformers at the peak of the mains voltage. It’s naturally where the current would be at a minimum under steady state. Really counterintuitive thing but the other way around at no voltage the core saturates for that half of the cycle and there are a bunch of current spikes until it settles down.
Brings back memories of college in the late 90s. I earn a AAS degree in electronics but not a lot of jobs in the city that I live in. Thanks for the flash back, Dave
if you didnt notice that the calculator is changing from time to time, you listened very well
I fast forward video to see it...yeah...now what was he talking about? 😅
He does this in all of his whiteboard videos. Sometimes there's a troll too.
I had loads of tries at remembering ' Ely the ice pick' or something like that, now all these years later when I don't really care along comes C.I.V.I.L so easy ! Bloody hell.
I need another beer
Alcohol is poison. I recommend a nice protein drink.
@@EEVblog I agree.. I haven't drank anything in 10 years.. and I don't miss it one bit.......... Pain pills though. I miss those
It's easier if you have any of those snazzy vintage portable supercomputers that he had on display during the video. My TI-89 helped me smoke the pot AND find X of c 😏
@@calholliYes, and the forbidden lollipops. 🤤 Lots of fun in college and grad school lol. And despite all that I still managed to get thru engineering with high honors each time.
Cheers mate.
Long time since any theory! The one quick element that might have been worth adding is that impedance of an inductor is essentially 0 at DC, and grows without limit, while impedance of a capacitor is essentially unlimited at DC, and drops without limit
Covered in a previous video IIRC
ELI the ICE man is how I learned inductive vs. Capacitive phase relationship.
Me too.. came here to comment this but you win!
i love how Dave gives all his calculators some airtime!
..oh god this takes me back!.. reactance and impedance have always been a PITA for me!
I love these educational videos. Thoroughly enlightening. Thank you.
I'm really enjoying this series. Been following your channel for years and I feel I've learned more than if I'd gone to school for electronics. I'm also on X now and hope to catch your posts!
I still remember how good his Op Amp tutorial video was.
@@MikeJohnMentzer I still don't know that video resonated with so many people.
@@EEVblog Like they say..."The elephant does not know its own strength." .....
Thanks Dave. Love it when you put out these tutorial videos.
Calculators to mark "subjects"... nice touch... 😀
An uncharged capacitor looks like a dead short, once charged, it looks like a battery which can provide a huge current (potentially). An uncharged inductor looks like an open circuit, once charged it looks like a battery that will maintain a current, possibly causing the voltage to spike dramatically.
3:02 I was wondering why there was a double dot on the i. 2nd derivative? What’s that doing there? Turns out I need to clean my screen.
Happens to me during editing!
The differential equation for an inductor is universal, while the concept of phase shift is a simplification used for sinusoidal signals
recalled my memories of power electronic course in university many many years ago..
Awesome, I like the portable calculator exposition, I just said that I'm happy not to be the only one to do that, Thank you.
Easier to remember what leads what by understanding what are the things we are dealing with: the voltage cannot instantaneously change on capacitor, i.e. the current builds up the voltage on the capacitor, therefore voltage will lag whatever current you apply. Opposite for inductor, where the current cannot change in an instant.
I don't need an AC tutorial, I just got here cause I couldn't resist the Voyage 200 calculator in the thumbnail.
instead of CIVIL, in german there is a saying
"Kondensator: Strom eilt vor!
Induktivität: Strom zu spät!"
it's not that short, but easy to memorize 😊
One thing to note is that in real circuits, the presence of resistance will normally mean you don't get a perfect 90⁰ shift in what seem to be simple circuits.
ELI the ICE man!
None of that E rubbish here.
@EEVblog
You asked what we used, and I shared it. Don't ask me how I remember resistor color codes. 🙂
Electromotive force!
Hi Dave, Your explanations are super understandable. Let's talk about microphone feedback elimination with op-amps one day. Perhaps you can make it with auto noise frequency detection. 😃
ELI the ICE man
Could you make a video on all metal induction stovetops, the skin effect and Eddy current heating? Can not believe how often people say aluminium and copper don’t work on induction. Would also be interesting to know why the high frequency tech is so expensive. As far as I know Panasonic brought a product to market years ago.
AC/DC is the best!
Years ago I confused myself just running simple tests and getting skewed results because some of the resistors I was using were simple wire-wound. Took me ages to figure out why.
I don't use c.i.v.i.l., I just remember that when you apply a voltage to a capacitor, first (time = 0) the current will be high to charge the capacitor, so the current is leading. And then knowing that it is the other way around with inductors.
Great video.
So, with the Brave browser on this Win 7 machine, I'm getting one 15sec advert at the beginning, none in the video nor at the ends. Not bad.
1:42 Ruined by drawing arrows not at the end of the axis lines
w (Omega) is measured in RPS which is "Radians per Second".
ω
@rasimbot Please note that be cause I live in the British Isles I do NOT have any Greek or Cyrillic Characters on my Samsung Keyboard.
@@anthonyshiels9273 | But you can copy and paste
Good stuff
Ouch. 3:13 - reactive componets are also linear components, because any signals are additive.
As someone who hasn't watched the previous videos, I'm really getting Turbo Encabulator vibes from this video.....
Wow! That was great, thank you.
Do you have these videos im a playlist? I can use some brushing up on my electronics theory and math! Also, us Yanks use ELI the ICE man to express whether voltage leads or lags. ELI= Voltage leads current and ICE= current leads voltage! Thanks Dave! Now where is the video on current flow through a capacitor or "hole flow" theory and the Impedance video? lol Thanks again Dave!
Yes, playlist is linked.
@8:50 wow that’s a big calculator. Edit.. @10:30 no that’s a calculator!
Awesome! 👏
This is soooooo cool
But why/how can the current lag or lead the voltage? Doesn't the voltage cause the current?
What is the square wave, setting do on a multimeter.?
C.I.V.I.L In Polish we have something similar C.I.U.L. Its easy to remember, becouse CIUL is a bit of a vulgarism.
lol i just realized this video is not public and was uploaded 9 days ago. nice
thanks tho, these videos help a lot
The UA-cam Playlist bug is still around I see.
Hey ho, saw your negative feedback shirt in the shop. Funny idea, but why ist the circuit a non-inverting amp? Shouldn't it be an inverting one?
Don’t know why but I think of speaker crossover 😮
"ELI the ICE man" is a very common memory phrase here in the USA. ELI (voltage leads current in a inductor) and ICE (current leads voltage in a capacitor). Also commonly used when teaching people to pass their amateur radio license test here in the states.
Ditto!
What's happening with calculators?
I remember it like that: an inductor is a coil and the current has to run longer to reach the end of it, thus it's 90 degrees late. (This is a pure mnemonic, not a real explaination)
Damn sight better than my lecturers.
Why is it 90 degrees?
your equations closely match the rule of thumb in life; small men smart, big men dumb 😂
I feel like I'm in 2009 UA-cam.
COOK my Aussie brother, COOK.
Mrs EEVblog said I can't cook and I'm to stay away from the kitchen.
@@EEVblog I meant meth, brother.
Nooo! it's ELI the ICE man!
That’s how I learned.
This is also how I learned it
None of that E rubbish.
It's confusing calling it omega... because the Ohms symbol is capital omega. lol.. What a mess
There's only so many symbols. We need to use some of them for multiple things.
@@maxine_q Don't be silly.. You can go into AI right now and tell it to "create a page full of new symbols that have never been used before" --- and it could just draw random scribbled lines and create a billion different things. It's only limited to your imagination....... But for some reason, we like to use antient people's scribbles... I mean, even then: instead of Greek letters and Roman numerals-- we could throw in some Mayan and Egyptian hieroglyphs, or Chinese hanzi, or Japanese kanji... symbols are infinite.
@@calholli Now you are being silly. You want everyone that doesn't have a problem with the current system to change the working and established system and adapt to it, just because you can't be bothered to learn the difference between upper case and lower case omega.
@@maxine_q I'm not saying to change it.. I'm saying, it should have been better from the start.. Cheers
Learnt these shit once upon a time but couldn't make a decent living by 'monetizing engineering skills' .
I am one of those losers at life with nothing to my name except big flex engineering degrees that wont sell
😂😂😂😂
I thought ACDC was a Scottish band migrating to Australia to make some real music?
Good Tip with C I V I L
Your videos are a true resort for the mind and soul. Thank you for your talented channel management and amazing content!😗🐱🏞
Your channel is a real oasis in the world of UA-cam. Continue to delight us with your work.🟩🏍🌯