How Inductors Work - The Learning Circuit
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- เผยแพร่เมื่อ 28 พ.ค. 2024
- Inductors are used in so many electronics, you're likely surrounded by them and don't even know it. Find out how electricity and magnetism are made to work together to make your electronics more stable and efficient in this weeks video about inductors. Connect with Karen on element14: bit.ly/2FwYsda
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The time it takes the magnetic field to grow and dissipate is the first good explanation I've had for why inductors may pass under a certain frequency or get blocked above a certain frequency. I've literally never had it explained that way in my 16+ years as a technician. Anything that aids in a stronger magnetic field, i.e. core material, proximity of coils, and amount of coils lowers the frequency the inductor will pass. You just blew my mind. Thanks.
great overview. would love to see more in their application tho, they have a lot of uses!
Her voice has clarity which, allows her words to be easily understood. Even though she speaks quickly: it's a video and can be replayed if required. The informational content is also clear and easily grasped. She is one of the better communicators I have viewed which, makes her presentations enjoyable and not a comprehension struggle.
Great lady, and great channel. Thank you very much.
As somebody just getting into amateur radio, I cannot fully express how useful and wonderful this series is!
Inductance and AC were my achilles heel when I was trying to self-learn basic electronics as a teenager. While I understood some of the basic concepts, and while magnetism has held a lifelong fascination to me, I never really understood it. Now, here in my late 50s, I am trying again. I have two key advantages. One is the readily accessible and affordable availability of test equipment such as LC meters, completely out of my reach as a teenager. The other is the availability of tutorial materials, such as this video. These concepts still fry my two remaining functional brain cells, but there's a certain addictiveness that makes this topic oddly compelling to me. It's always going to be weird funky invisible magic though, which isn't necessarily a bad thing for a casual hobbyist.
Nice work Karen!
I am a new subscriber to this channel , and so far your explanations of how things work are really great . Easy to understand explanations without the boring feel of a classroom lecture . The first video I came across was the one on relays , and switches . After watching that video and understanding the content I was hooked , and it quickly turned me into a subscriber . I revisit this video from time to time as a refresher . Currently I live in California and although we have a lot of options when it comes to electronics I’m having a difficult time finding a electronics course in which I can take specific to the understanding of the content you are teaching . I guess What I’m trying to say is , if I wanted to be a commercial license electrician or havoc specialist then yes I could easily find a educational program . If I wanted to be a computer whiz I would attend a school like I TT . What I am looking for is the ins and outs of electronic circuits such as troubleshooting voltage drops , Bad resistors , damage relays , switches that don’t work , The list goes on hopefully you understand where I am coming from . Basically what I’m trying to say is this is a really good channel thank you again for putting out the content that you do .
Great job. Keep up the good work.
0:52 when the current is constant the voltage across the coil should be zero no?
v=Ldi/dt ?
This is my sentiment as well. It means that di/dt=0 hence V_l=0.
Respected:
Doing good job , continue to teach us basic fundamentals, without which to proceed further is difficult.
Regards
amazing classes,
7:13 Great point on discharging coil. That's why we see diodes connected across motors and relays. Sometimes called a "flyback diode."
Anyway, It's crazy how much starts with a just coil of wire: inductors, transformers, electromagnets, solenoids, speakers, dynamic microphones, relays, motors... did I miss one?
1:17
Shouldn't the voltage be of opposite direction as shown according to Lenz's Law
Thanks, Karen!
Nice work
Good job
Beautiful
This is all very well and good but why do i need an inductor on a circuit board at all?
th-cam.com/video/r1t0ZjD9X7A/w-d-xo.html
When the polarity of a coil is reversed (1:27) the magnetic field should collapse then build-up again with the opposite magnetic polarity. Yes?
i actualy have a old Aopen Mother board that uses 2 Like the green on at 5:42 Donut/Torus shaped but its missing one of them, so am not sure if it works without it or on how to fix it or shud try to find exactely same mother board picture to see if it looks identical first and then maby try to make one or buy one? :D love the show
Good idea mem
Nicely explained, have you finished on serial link communication if done send the link please.
Thanking you
Vijay
Question: Would you call inductance charging safe? I'd be worried if part of the motherboard was insufficiently shielded, possibly interacting with SMD components like e.g. an antenna.
NICE 🎯👍
Nice
Are inductors high wattage resistor's, that's what I was told in basic Electronics's class in 1982?. Thanx
0:54 - "When the current flowing through the wire is constant the potential across the coil matches that of the power supply." No. When the current through the wire is constant the voltage drop across the coil is zero: V = L*di/dt. Since di/dt = 0 then V = 0.
I'd forgotten the unit of inductance was a Henry. :D
The sun and earth is a good example of induction.
Just briefly touches on the practical applications, this needs to be expanded not just like a picture of a set of speakers at the end … like what is the point of learning this stuff if its not applied or shown how its applied
The super learning mam
Hi! What are you new videos?
Your mention of an inductor needing a purposed discharge pathway when the magnetic field collapses and the resulting electric current not being needed (as when a system is powered down) and will find a way to ground…I didn’t hear you mention the possibility of you or I also being eligible to be on that list of current pathways. I’ve seen some poorly designed boost converters and high voltage SMPSs (along with old CRT screens utilizing fly back transformers…technically an inductor too) that had the potential to electrocute the unwary or ill-trained person poking around inside the chassis of a device utilizing these inductive bits. Then there are the LRC filters common on Class D Audio amplifier modules…again if poorly designed, those can be an attractive and deadly nuisance too. Attractive because it’s rated at 500 watts, available on EBay or Amazon for $25-$35 dollars and for that kind of money, deadly because the design and build quality are SAF and unless one is educated-experienced in working with these bits in a at least general sense….it’s analogous to the post rectifier electrolytic DC filter caps on a vacuum tube tech audio amplifier. No, not just the technological anachronisms one buys at thrift stores or flea markets, but also modern built guitar amplifiers by Marshall, Vox, Fender, etc.
Where is your actual demonstration
Nice talk, thank you. It would be nice if you slowed your speaking down at little to a more restful speed. I can understand what you are saying okay, however you are racing as though you are not feeling at ease. In all other respects a very nice tutorial!
Great thank you.but please can you speak little slowly to understand much.
If you covered heating elements today you could have gotten rid of the sweater and scarf :)
Nearly 14k views for 17 comments. Does that mean you’re shooting above the head of the audience? :D
Cool, there's no more excuse to be educated, thank internet:-)
Old hen .
Can you talk slower pls. thanks