How to Design a Coil for Specific Inductance

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How to design a coil for a specific inductance that you need, including how to calculate the inductance and where to find an online inductance calculator. This goes through all the parameters: number of turns, area, length and relative permeability as well as mentioning some other factors like capacitance, frequency and coupling.
The webpage with the inductance calculator is here:
rimstar.org/science_electronic...
This video was made possible in part by these Patreon supporters:
Jonathan Rieke
James Padden
Juliusz Wojtyga
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See also:
How to Make Capacitors - Low Voltage Homemade/DIY Capacitors
• How to Make Capacitors...
How to Make Tesla Coil - Small Spark Gap Tesla Coil
• How to Make Tesla Coil...
How to Make/Build a Crystal Radio
• How to Make/Build a Cr...
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1 июл 2024

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Комментарии : 419

@learnerlearns 7 лет назад

Superb presentation Sir! If school was like this, the world would be a smarter place.

@h.sapienstechnologicus8865 3 года назад

I’ve seen ALL of RU-vid’s inductor videos and this IS THE BEST of them all. For me. I understood everything you said. Solid content.

@cr8cat794 Год назад

This is quality, crystal-clear explanation. This makes it clear how to experiment and how to achieve a desired goal. Thank you!

@hughh106 7 лет назад

Great Video, your crystal radio series has got me building them.

@itaylavi2556 7 лет назад

the best explanation about inductors design ive ever seen

@aborgeshonorato Год назад

I love you 💓 and your channel. I am teaching Physics in India for the first time and your channel is a huge resource!! I can't believe that you are providing it for free. Thank you and God bless 🙏

@stevedoubleu99B 3 года назад

Excellent tutorial Sir. As inductors have never been my strong subject, my brain was overheating a little, but i'm gonna stick with it!! Thank you.

@thepricklyseed 3 года назад

Thank you very much for making this video and the online calculator.

@diecksl 7 лет назад

Thanks! I was looking for a guide like this for weeks!

@MarinusMakesStuff 7 лет назад

Thanks, I've been working on Mendocino motors and coils for charging (induction) and signaling (with a hall sensor or a reed relay) a bike light design. This comes in handy!

@loveboyhatch 7 лет назад

Keep doing what you do! You are helping big time! Thank you :)

@z11542 4 года назад

OMG. You must be a teacher. If not then you would make a great one. I always learn a lot from your videos. You are the best i have come across so far on the internet. And the internet is quite large.

@gazzabro55 3 года назад

This is exactly what I was looking for, thank you.

@keghnfeem4154 7 лет назад

That is great. I need to make a delay line with inductors and this info will really help.

@KJFMZ Год назад

The video I didn't know I've been looking for for a year. 👌

@Taran72 6 лет назад

this is one of the best videos on inductor's I've seen so far. Straigh tto the point, practical, and easy to understand. thank you for sharing! :)

@bharatkukreti8449 5 лет назад

What an interesting way to simply the inductance making...luv it

@shaunsanders9673 3 года назад

Fantastic tutorial - much appreciated! Thanks.

@sidocious Год назад

Thank you for this tutorial, it is really excellent and a really simple way to understand how it works. Better than some tutorial in my own language :)

@shiva.chennai Год назад

Excellent video content. It is worthy to see the video.

@sydieonshaw2707 2 года назад

THANKS!!!! I was looking for this for a long time... I’m building my own we n low-pass crossover

@SuburbanDon 4 года назад

Great job. Clear and direct. Thanks.

@DeandreSteven 7 лет назад

Thank you so much for this. i was mullung over this while trying to build a primitve smps.

@yurigagarin4974 6 лет назад

I found your calculator online before finding this vid, Its very helpful thanks!!! 👍😎🇬🇧

@RimstarOrg 6 лет назад

Glad to hear it helped! Thanks!

@jamesallen6007 2 года назад

Superb explanation. Many thanks to you.

@yehiaelrifai2545 3 года назад

Very informative and precise to the subject matter

@acestudioscouk-Ace-G0ACE 3 года назад

That helped my learning curve, thanks!

@Purplerabbitstudios5139 Год назад

Thanks a lot for the calculator. IT really helps.

@hadireg 4 года назад

Nice! Thanks for this knowledge sharing!

@electronicsNmore 7 лет назад

Great video! I've used a few good online inductance calculators over the years. Having a good DMM with an inductance range makes life very easy. :-)

@rambo8863 3 года назад

Nice this help to find out more about coils, and i might eventualy learn to make my own circuts after my desiger

@gconol 7 лет назад

I love the way you explain it. Makes it simple to understand. The first time I glanced at the formula, it was very intimidating until you broke it down.

@RimstarOrg 7 лет назад

Cool. That's exactly what my goal was so I'm glad to hear my explanation worked. Hopefully you'll be a little less intimidated by formulas in the future since that'll open up whole new worlds.

@fabianarango7596 2 года назад

This man is what i call A GENIUS !!

@R462venom 5 лет назад

Thanks! I couldn't find the answer to why Tesla coils use air cores until your video mentioning it! Thankyou!

@thevintageaudiolife 6 месяцев назад

Hello! that's a wonderful receiver! thank you for sharing.

@jonathanhess9726 7 лет назад

Man you made this too late for me because I learned this over the summer.... Man you explained it so much simpler. Thanks :D

@jameselliott9397 5 лет назад

Completely 100% awesome video. Thank you so much.

@annelieseocallaghan801 6 лет назад

You are absolutely wonderful! Thank you very much.

@theroguetomato5362 2 года назад

Really informative, thanks so much!

@leonardochile8735 5 лет назад

Thanks for posting.

@richardjermain4052 4 года назад

Thanks so much. A lot of my projects will be much easier :)

@josephbaca344 2 года назад

Good work sir. Thank you.

@davoodseify3624 4 года назад

thanks, nice and informative information. very useful

@ddanilov22 Год назад

Thanks for presentation!! That's an awesome lesson!

@RimstarOrg Год назад

Thanks Dan! I'm glad you liked it. Thanks for watching all these years.

@mariuspaskevicius9204 Год назад

Super, very imformative ! 🔥

@ihsanbu 5 лет назад

thanks for these nice information about coil

@leskuelbs9558 7 лет назад

great video. lots of neat info.

@dinnade9338 7 лет назад

This is really helpful ... thank you

@MongrelShark 7 лет назад

Great Video. I wish there was a guide like this when I was a kid :) No doubt I will be linking to this one a lot :) I especially like the mentioning of all the Formulas, including the thumb rules and rounding off's that regularly get used when designing coils. Those little details can get a lot of people stuck on the theory unnecessarily. When they would learn more by just forging ahead and giving it a go so they can see how it works.

@RimstarOrg 7 лет назад

Thanks. Yeah, formulas are great guides. They're a lot of knowledge compressed into a small area. There's still a lot they don't say, but they go a long way.

@MongrelShark 7 лет назад

Formulas are easy to google. Its not always so easy to get a quick yet accurate guide to using them. Its very helpful to show how they work and which numbers are constants and which ones can be rounded etc to make it all more user friendly while maintaining an acceptable error margin :) For beginners looking up LC circuits it can be very overwhelming. Now thanks to this video it needn't be :D

@RimstarOrg 6 лет назад

Do you mean the thickness of the wire? The only effect the thickness of the wire will have is that thicker wire will mean a longer coil and length is a variable in the equation (see the inductance formula in the video). If you're trying to keep the coil a certain length then a thicker wire will mean that you can fit fewer turns into the same length. If by thickness of the coil you mean the wire thickness' affect on the coil's diameter, then the diameter includes the thickness of the wire. That's because the diameter is measured from the center of the wire on one side to the center of the wire on the other side. The diameter goes into calculating the area variable in the formula.PS. Sorry for the delayed reply. For some unknown reason, RU-vid flagged your comment as spam and then didn't tell me about it until now.

@btcminer6496 3 года назад

@@RimstarOrg I googled lots of times to find a formula to calculate the inductence but each websites shows different different formulas .Which one is the correct ?Please reply me too.Here are some examples 👉L=MaN^2A/d 👉L=D^2n^2/45D+100l 👉and your formula.

@ivarnordlkken8082 Год назад

Theese formulas were in my electronics textbooks already 50 years ago. Before RU-vid.

@ed9709 5 лет назад

Very clear Sir. Thank you.

@pdanayal Год назад

Excellent explanations too good and very nice vlog . from India take a like.

@javackman7 7 лет назад

very good video helped me learn this beter. thank you

@BarefootBeekeeper 4 года назад

Really useful, thanks!

@kaustubhponkshe6186 6 лет назад

Great Video . I request you to make video on tuned transistor amplifier design. It should include , design of biosing resisters , tank circuit etc

@markjulius2006 4 года назад

Wow. Finally someone who knows what the hell he's talking about. I've asked so many people about everything in this video, and almost no one could tell me the science behind making a coil. Nice job.

@gerardmelvin8670 7 лет назад

Very Good Video my friend thanks .

@aselectronics6748 4 года назад

This video is very help full tnx

@moinshaikh6684 3 года назад

Mond blowing honest explaination...!!!

@scottfoulk7480 4 года назад

Excellent!

@TSulemanW 5 лет назад

Nicely explaination

@user-sg9nu7ym7z 5 лет назад

full explanation thank u

@user-by3wu3uw3y 6 лет назад

Great video thanks a lot

@hili467 7 лет назад

:O Omg please please please do one for the capacitance of coils too!

@jilljulaton9936 7 лет назад

You're a great man god bless

@techtinkerin Год назад

Thanks really helpful 👍❤️😎

@realkh7974 3 года назад

Good tutorial

@007jacquie 7 лет назад

★ Awesome Report Thank-you ★

@jnc5255 8 месяцев назад

Thank u very helpful 😊

@crispijnvansas 4 года назад

Thanks for the video, I’m currently working on a coil for a bike light and want to calculate the amount of watt being output from a coil. How would that relate to the inductance?

@zaccomusic 4 года назад

nice content I hope you keep update :)

@arvindh13 4 года назад

great video.

@axnbjsbdudbydvydubu9355 6 лет назад

Hello RimStar, can you please do calculations video for an induction AC motor ? thank you

@erwy-sf5ze 4 года назад

Thanks You re the best

@farabielec 3 года назад

Thank you

@vincentpereira8416 9 месяцев назад

Very nice

@adnacraigo6590 Год назад

Well you blew my mind.

@pardeepmanro7471 Месяц назад

Great words by you. Can I request for induction calculation

@johnmartin6178 3 года назад

Good video. Only just found this on YT so wonder if you have done a vid on making toroid coils, or the calcs thereof?

@RimstarOrg 3 года назад

No, sorry, I haven't.

@chandrayuanto1332 5 лет назад

very nice sir

@bittunaskar9531 7 лет назад

thank you

@red_juan 2 года назад

I have a question, what would the formula be if it was a square coil? Like in stator of electric motors, or is that reduced to a circular coil for simplification?

@martinlicht1969 3 года назад

Thanks for the helpful information; how does wire guage/ coil resistance play into this? Appreciate you sharing some great basics

@pilerprism8468 6 месяцев назад

The thinner the wire the less current can flow through

@vijayrajjak9605 6 лет назад

thankyou so much....!!!!

@Willster451 6 лет назад

Thanks

@abatmantv1354 2 года назад

this is nice

@shamsuddeensani3704 7 лет назад

its really interesting

@crancowan8020 2 года назад

I like it better when folks use units in physical equations. For example, the 'mysterious' constant 1.26ee-6 is really just the magnetic permeability of free space in units of H/m. As such the distances should also be in meters.

@TheArtofEngineering 2 года назад

Question.....Also Merry x-mas!.....I just built a double balanced mixer.....I bought some toroid cores from Jaycar. Turns out they are "iron cores" usually used for EMI suppression. My question is.....does the type of core become more critical when frequency increases? I think my DBM is actually an RF attenuator! When I fed my nano-VNA directly into the antenna socket of the DC 3.5Mhz rcvr I built using this DBM I could hear the sweep tone it was generating in the 80m band....I have ordered the correct toroids...hopefully this will fix it! Are air cores usually ok for HF (below 30mHz) if I don't have a toroid? Thanks for the great content!

@pedroasg9384 6 лет назад

Hello ! I enjoyed yor video very much , it teached me a lot but i have one question : What material would you use to build a wind turbine generator ? Congratulations for Your Great Work

@RimstarOrg 6 лет назад

I don't know, I've never built a wind turbine generator. I'd imagine you would not use an air core though. Likely ferrite or layers of steel insulated from each other to minimize eddy currents. I'd suggest searching on RU-vid for DIY wind turbine generators -- I know I've seen them around, though I don't recall any details.And thanks.

@robinhoed5729 3 года назад

thanks

@jerichotm2122 Год назад

Thank you! That was very inspiring! :) Though... I need to do a specific coil with multiple leyers and on Iron-Silicon sheets ... its for audio crossover, and since this coil that i'm trying to build needs to cross a speaker at about 175 Hz, I definately need Iron core, because by my calculations it has to be around 6.2 mH... its huge if I have to build it on air core! But I do not know what is the permeability of this type of alloy (iron-silicon)... on wikipedia it says its around 19-90! I don't know what to do anymore... my sheets have 15 mm width/ 71 mm in lenght and I have used 30 of them because they are only 0.3 mm thick

@daviyed Год назад

Nice video 👉👈

@brettnorthey7557 2 года назад

Legend

@keeperofthegood 7 лет назад

Does shape affect how an inductor behaves? Not in terms of measured or calculated inductance but in how that inductor responds to changing frequency or loading or in transmitting? For example, if I had two 240uH inductors, one on a round tube, and one on an egg shaped oval tube (say I taped a sharpie to the cardboard tube then wound the coil so I had a nice prominence for my wiper) would there be a difference in how they behaved?

@rizwanmalik3659 Год назад

Hi very good In my childhood i created this with different pieces of wire join together and wound on 3 inch peace of wood, Use 50 oham diode it works amazing with out antenna and earth ,and also generate power to glow LED . But others many many experiment failed at same time. I realized first coil wounded with natural frequency that catches frequencies and convert into power.

@barrykelly2722 10 месяцев назад

I want to glow an LED.

@gsambolin 2 года назад

Wowwwwwwwww I love this video Thank you New Sub here. How would this work with a Tesla Bifilar coil that has two wires in each turn?

@machiElectronics 4 года назад

Nice sir g

@natasho4835 6 лет назад

What kind of coil do I need to use when I have a esaki oscillator hooked up to a DC to DC boost converter ???

@pabloosvaldopenizzotto1098 6 лет назад

How you can apply this formula for a multi layer coil? Let’s say for a crossover network in a speaker system. Do I have to use the same formula for each layer with the small diameter variation, then considering all coils in parallel?

@RimstarOrg 6 лет назад

For multilayer you need different formulas. Try googling "coil inductance formula multilayer".