Make your own wire-wound resistors

[@dalenassar9152]

Very recently, I have had to make some rather serious precision wire-wound power resistors in exactly this manner. There is one issue I'd like to share. To make things fit I ended up using TWO layers of the nichrome windings. I ran into a major problem...the parasitic inductance was way too high. My first attempt to eliminate this inductance was to make two separate resistors tube, but with one wound in the opposite direction. I tried series and parallel connections (following the series and parallel law's of course). The inductance problem remained. I finally realized the magnetic fields had to INTERSECT to cancel properly. When I wound the -insulated -series coils, one inside the other, and in OPPOSITE winding directions...The POWER resistor was almost inductor-LESS! ...just wanted to share this... THANKS FOR THE GREAT VIDEO!! --dALE

[@MarcelOoms]

Niice video, thanks. Here's finally my chance to appear smart: when making these for audio, it's best to wind half in one direction, and then the other half in the other direction on top of it (some tape in between). That way, it has no inductance which would filter high frequencies. Not my own idea, elas.

[@learnelectronics]

+Marcel Ooms yes. Very good idea

[@friedmule5403]

And in next week, we make a 1Mohm, we will use 56.338 km or 35 miles wire! :-)

[@REDJ1]

i enjoy the lack of bs in this video simple & straightforward nice video!

[@zacharyfinch2722]

lol i drove all over town today looking for resistors and this guys spooling em up at home :D i miss radioshack

[@MrPanetela]

thank you, i needed this tutorial. i use a vape device and glycerin to help my congestion. the glycerin helps to loosen the congestion and makes it easier to cough up. However, the coils in the vape device do not last for ever. and are expensive to replace. therefore using your system to wind my own coils would be a brilliant solution. yes, there are already other tuts specifically about winding coils for vapes, but none of them use a motor to spin nice precise tight coils like yours does.

[@RussellTeapot]

Your avatar looks like a cellular automaton output

[@MrPanetela]

@@RussellTeapot Actually if memory serves me, I converted my KZbin handle into QR code which I made years ago. But guess what! I never heard of cellular automation output before, and you can bet I will be exploring that subject! Thanks.

[@carldavis8228]

Nice, is there a higher resistance wire for creating higher resistance winds without having a using 121 KM of wire for a 2 Meg resistor?

[@learnelectronics]

There are different grades. I used NiChrome 80. You can get other grades with higher and lower resistance.

[@jamest.5001]

Carl Davis what about a resistor to handle 1.21 gigawatts @ 1.21 jiggavolts! any other parts for the time circuits?

[@carldavis8228]

James stranger if I had that I would not need to wind my own resistors. I could just go back to 1928 and buy a 2Meg grid leak resistor to restore an AK model 20.

[@jafinch78]

@@carldavis8228 There should be calculators somewhere or maybe the nichrome wire calculators can be easily modified once the properties of the specific materials are known.

[@jafinch78]

I was wondering what the sintered materials used are or is? That led me to wonder about using a refractory cement maybe that is sealed so not hygroscopic issues so much? Looks like fort the tube design a porcelain tube is used. Though not sure what the outer insulating coating is.

[@szaki95]

Thanks for the tip, now i'm gonnna take apart a hairdrier to make a 360° wirewound potentiometer :D

[@lovepreetkaler9353]

It will not heat up too much when electricity will run through it?

[@alistaircornacchio5727]

What is potting? and how would you accomplish it in a DIY setting like this one?

[@learnelectronics]

Enrobe it in epoxy

[@tksewingmachineandrepair4243]

Thank you for the video. It helped me immensely. I have to replace resistor springs. This video got me down the right road.

[@xeno8555]

make use of charcoal art/sketch pencils and you can achieve a better resistance... like 1M, 100k, 10k, 100 ohm.. either soft or (preferably) medium charcoal, just fill a slug like an old blown fuse... fill it with paper tubes to coax the inner fuse (outer carbon) to achieve different (smaller) resistances... it would be interesting to see what other ppl might use instead of the old fuse to make ordinary sized resistors of significant resistive values

[@flyback_driver]

Thanks for making this video. It helped me out with my projects.

[@alexstone691]

If I used thicker wire I could make it so it can handle a lot of current right?

[@Bob3519]

What could be used to "pot" the wire? Would plaster (like plaster of Paris) work? How about 2 part epoxy? Is there a specific product to use?

[@learnelectronics]

+Bob3519 Plaster is a common one, and epoxy as well. Even melted wax would work for low current.

[@rich1051414]

Plaster of paris is exactly what traditional power resistors are potted in. That is perfectly fine. Some electronic epoxy gets gummy when hot, so it might not be good for high power. Plaster of paris simply chars a bit but doesn't turn conductive or melt.

[@bizim_eller]

Epoxy melts at 350* Fahrenheit

[@jafinch78]

@@rich1051414 I was wondering what the sintered materials used are or is? That led me to wonder about using a refractory cement maybe that is sealed so not hygroscopic issues so much? Looks like fort the tube design a porcelain tube is used. Though not sure what the outer insulating coating is.

[@chadkerr7285]

Use fiberglass resin and after it cures in a round cylinder tube shape, evenly space out some aluminum washers from one end to the other using more resin but applying it with a small paint brush or similar tool to fix the washers in place. The aluminum washers will aid in dissipating heat from resistor better than resin, plaster, mortar, etc just by themselves.

[@scottlamb2078]

Haha i was wondering where I could pull some wire from when u said it. Wife won't be to happy but shit happens lol

[@chadkerr7285]

I knew some hairdryers were going to eat it after this video. Lmfao. 😂 hilarious.

[@alchemy1]

So when that spring gets hot it will melt your plastic tube or how does that work/

[@ReplicateReality]

just don't apply too much power

[@bizim_eller]

Appreciate the video very much, learned something new, I wish you have a nice healthy life🙂

[@dougiequick1]

Thanks I forgot about nichorme luckily I save everything and had a box full of salvaged nichrome from various stuff over the years ....took 15 minutes to make 2 wire wound test resistors to troubleshoot my SRS (airbag and related ) on my miata ....worked perfect found a defective seatbelt pretensioner by unplugging and clipping 2.5 ohm resistor accross leads then using new scanner I bought I simply cleared all codes and airbag light went off! Shop wanted 120 bucks just to connect scanner one time with no guarantees they could read or clear any code so my resistor and 140 dollar scanner totally nailed the trouble AND it turns out its really not the pretensioner but just the stupid locking terminal failed....now on order $7 ali express (had the clearest picture and by bar best inventory and price even if it does a long time to receive....some places aks 85 bucks for stupic connector! THIEVES!!!)

[@melplishka5978]

What would u use to pot it

[@robbigley195]

I am trying to make a resistor for my security malfunction on my vehicle I need between a 1 and 15 all my believe resistor I had a dryer how much in Link of that wire would it require to make a1.5

[@dalenassar9152]

What about power rating of #28 nicrome wire under heavy load (a few amps)?? Thumbs up!! one more thumb for 1000!

[@acqurius-gx8lr]

how to make high voltage high current resistor by using minimum nichrome wire.what is the inductance of your made resistor as now non inductive resistor are also in use in high voltage application

[@ELECTROGYAN]

What about power of resistor

[@jonmcgrew8699]

Can you show me how to make a 2 ohm resistor

[@austinalexandre716]

was that pun intentional “why’re we talking about this” (1:49)

[@jamest.5001]

I was wondering about this. what about making a high wattage pot? maybe wind the nichrome wire around a ceramic bar. with a brush from a motor for the wiper. think that could work?

[@learnelectronics]

Well sure, that's called a rheostat....goo.gl/images/A7do8D

[@jamest.5001]

learnelectronics yea I know . when does a potentiometer become a rheostat ? what is the difference between them. or is there one?

[@jamest.5001]

GRBTutorials so a pot can be used as a rheostat but not vise versa . I guess rheostats are for heavier loads also. most I have seen are huge compared to a pot. thanks. I'm trying to learn all I can. there is a lot out there. the thing though. is finding someone who explains it where you can understand it without making you feel dumb. I wish I got into this in school. I'm a lil old to go back. by your handle do you do videos? I like watching projects also. as long as I can learn something. or it makes me think. thanks for clarifying .

[@InventTwig]

you've created an inductor! you should ideally bend the wire in half and then wrap it.

[@terryglenweaver]

Yes, an inductor and resistor! And So... a choke, filter. You, I think have the correct idea... Fold them in half -- if it wil cancel each other out. Since I have yet to ever make a wire-wound resister, I can only theorize. My thoughts were to wrap half around that pen then the other half around something small enough that the smaller windings fit inside the larger windings with an insulator (form of a sleeve) in between the two windings.

[@magnuswootton6181]

I wonder how many amps this thing can take down it, probably pretty good.

[@michaelpadovani9566]

It's always harder than it would seem (and that's not just for electronics)! Cool idea. Could you use this as a cheap current shunt?

[@learnelectronics]

+Michael Padovani You could, I'm not sure how much current it could handle.

[@kobolila-yt]

Excellent thanks. Now subscribed to your channel. FWIW, maybe running a piece of wire through the hole and into the container, taping it to your resistor wire, and then pulling both back through might have made it a little less challenging :-)

[@learnelectronics]

+Kerry O'Connor very true. Thank you

[@chadkerr7285]

Good suggestion! Impressive

[@ReplicateReality]

what was the list of people?

[@gartmorn]

Are the wire wound resistors enamel coated to stop internal shorting ?

[@learnelectronics]

It depends on the use. If they are going in a high current circuit, then generally no, they are just anchored. The enamel would just burn off.

[@nfcradio4622]

It add Inductive effect too.

[@wooglet5203]

Can it discharge my leyden jar

[@georgechambers3197]

Let's throw some voltage to it and see how hot it can get before melting! Never thought to make my own resistor cool stuff, thanks for the video! How long before school starts?

[@learnelectronics]

+George Chambers ok, I'll burn one up soon. School starts Monday.

[@georgechambers3197]

Oh boy! Have fun at school. I forgot to mention I really like the new opening. Looks like an interesting circuit.

[@bonduren887]

what is the diameter of the wire?

[@JP-qz9uz]

Nice video and funny too! Thank you.

[@jamest.5001]

just in case you want to make your own hairdryer .. I guess you can tell I LIKE TO MAKE STUFF! another question. how are you at etching PCBs ? I'm debating on crudely etching a couple. PCBs or using proto board. any advice. when I say crude I mean really crude. hand drawn. and maybe even pull out the dremel! the more I think about it I'm thinking 'easy route', great video .

[@learnelectronics]

For $2 plus shipping you can have them professionally made and in your hands in less than 2 weeks. The global economy rocks!

[@gerryroberts662]

I like this video.. keep makeing them,,

[@ianide2480]

Think I would have wrapped it around a Bic disposable pen tube and just left it on there. Add small holes to the tube from the start, trim the tube to size when done, and add super glue here and there while winding. You could have also started with a higher gauge nichrome to use much less wire as well.. Cool idea though =)

[@alistaircornacchio5727]

where would the holes be?

[@yummyklown9226]

This is how to make coils for vaping. I have wire out the yin yang and a jig to do this when I vaped.

[@Uraim]

is it copper wire?

[@learnelectronics]

Yes

[@Uraim]

@@learnelectronics ty

[@ulysseshamm6667]

Did this guy eat peanut butter right before the video?

[@johnb9187]

and wire we talking about this? :)

[@chadkerr7285]

Sooooo many hairdryers are going to parish now!! Lmao. And possibly other appliances with heating elements only to prove that someone can actually make one at home costing themselves or the family a t least what a new hairdryer would cost. Then get yelled at and made to feel stupid when they find out these power resistors are only a few bucks new at the parts store. Lmao. Good video though. I stayed till the end! Cheers!

[@1000000volts]

I came here as I wanted to make a quick 3 k ohm resistor lol , I have ordered some instead .

[@martinda7446]

@1:30 A tenth of an ohm?

[@bizim_eller]

It is ok martin d a , one little mistake and we knew what he meant .

[@Jasfras1]

One hundredth

[@NavinBetamax]

Now And Forever.......Asthma......

[@vinodkumarmourya1485]

Good information, thanks

[@belajarbisnisonline9324]

Why don't You just cut the other hole and glue

[@Wraithsong]

thank you

[@21thTek]

NIce, congratulations

[@ChrisM-um8qi]

Use a pen or screwdriver next time for finding the hole

[@jamesallen6007]

As always, simply put.

[@Ciekawostkioporanku]

This is not a resistor per se. You made a coil of shorted wire with no heatsink. Resistors have loops (not coils) to prevent induction, and are in contact with material that redistributes the heat, so that the resistance is constant. If you would connect a 9V battery, you would get 4 Watts of heat that would build-up inside the closed container. The resistance of Nichrome would then drop and get even hotter after a while leading to a runaway effect. Here is a list of things you could do to prevent this: 1) no coils - make loops and counterloops. 2) cover the wire in lacuer to prevent shorts. 3) Fill the container with sand and/or glass fiber. Cheers!

[@dexterperucho90]

20% electronics 80% heavy breaths

[@harryharrison4876]

Haha - he needs more cake!

[@inerlogic]

.01 is one hundreth... .1 is one tenth....

[@aj-pro8291]

Super

[@NitroGuyJH]

First comment! Woo! Lol yeah it’s definitely frigid... I’d be wearing shorts if I lived in FL, but noooo, gotta put clothes on here under zero. Haha! I love you videos man!

[@learnelectronics]

Thanks

[@RyanJardina]

Hope this guy gets healthy, half of the video is him breathing heavily. 😿 Thanks for the though.

[@robertstehlik7668]

Come on.. Reaaalllllyyy? Saying things like that can super destructive to someone- whether you really do have positive intentions or not. If anything offer a tip for him? Example: hey, i used to have an issue with shortness of breath that I noticed you experience in this video. What helped me was blankity blank.

[@ariannacasebier9284]

Good luck!😈

[@Jasfras1]

Do you vape ? Sounds like you are in the first stages of COPD. Be careful my friend.

[@learnelectronics]

No vape, been sick for about a month

[@Jasfras1]

@@learnelectronics .... You make great videos . Look after your body and it will look after you. This isn't electronics but good nutrition and exercise. My guess is that you don't get much of either and are probably overweight. We need guys like you to stick around and educate us.

[@ziongite]

While it does work, it's way too large, and because of how cheap resistors are, there is never a point in making your own. For example you can get resistors in an aluminium case on ebay rated up to 100w for a mere 2 dollars. Your video isn't useless however, because at least it basically helps some people understand how basic resistors are essentially. I hate the CCP itself, but sadly if you want cheap stuff you have to buy off China, since no other country makes cheap stuff like this. If I try to buy a similar 100w resistor in Australia, they will charge me like 20 dollars.

[@learnelectronics]

The point is to learn the theory.

[@dionedde]

man you need to lose some weight... i feel exhaust and anxious just by hearing you breathing =S good video, learned a lot thks

[@learnelectronics]

That's because I am slowly dying from congestive heart failure and I have to use oxygen, but thanks for comment.

[@RaeesUnboxingwala]

Lockdown happening

[@robc4191]

Ha ha! Little did you know...

[@johnbbop9263]

Dude all I hear is you struggling to breath it's extremely annoying I had to stop the video

[@learnelectronics]

Sorry my congestive heart failure upsets you

[@althds7099]

kul

[@hasans.m.1618]

What a painful video to watch

[@cec148]

tragedy!

[@timmarrier]

Dude! 9 minutes to demonstrate the resistance of nichrome wire with a meter? Dude! And you title says, well, you know what it says, but the point is....dude! Electricity is dangerous, and so is burning plastic fumes and red-hot wire flailing about in a panic situation, so what is this video going to do for the average homeowner except maybe fill a swear jar?? Dude!!

[@learnelectronics]

Don't like, don't watch. Buh-bye

[@timmarrier]

Well that kinda goes without saying, lol, but here's your title: "Make your own wire-wound resistors". Now think about the ending of your video, its content, and try to rationalize if the conclusions followed from the premise. My prediction is something like "not very reasonably". This is not an attack nor an insult, just logical processes we use every day. What is the responsibility of honest education? You tell me.

[@mieldeabeja6453]

Thank you