How do these Magnetizer/Demagnetizers work?
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- เผยแพร่เมื่อ 16 ก.พ. 2024
- These cheap screwdriver magnetizer/demagnetizers are amazingly effective. In the video, we look at how to use them and how they actually work. And most importantly, solve the mystery about what the staircase in the demagnetizer section is actually for.
- วิทยาศาสตร์และเทคโนโลยี
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They are more effective than I judged they have a right to be. You'd expect the magnetizer to not really magnetize and the demagnetizer to not really demagnetize but what you get is something that is very effective at both. So its not transferring anything to the screwdriver, its just lining up existing magnetic domains within the steel or partially randomizing them. A very cool and handy piece of kit, even the super cheap ones.
Exactly what I thought - amazing little devices. I wish I knew who came up with the ingenious designs that so cheap and yet so effective.
@@ElectromagneticVideos
One should be able to make their own? - crudely or with a nice 3D printed case.
@@djmipsTrue but this is probably one of the few things it’s cheaper to just buy lol - it’s hard to beat $3 at a local walmart or $1 on Temu, vs the costs for the pla, electricity, magnets, and your time
@@ElectromagneticVideosThe earliest one I found was a patent in 1967 by Cloyd D Smith (US3467926A)!
@@djmips Yes - the hardest though would be to find a suitably shaped magnet.
The drawing was very helpful for understanding how the demagnetiser works.
I glad it helped - I always find a diagram makes things easier to understand or visualize.
Indeed.
I bought one of those and found it really works. Didn't get detailed instructions on how to use it. Now I know thanks to your posting this. Thanks for your help!
Your welcome! Glad the video helped!
It seems so simple when the construction is revealed. I always wondered how these things worked.
I think I referred to it as "magical" in the video and it is! It did take a me a while to clue in what the steps were for.
The first thing I did, after seeing it work, was break it open 😅
@@assasin19991999 Its so intriguing its hard not to do that :)
Had one for decades but never knew it worked that fast and didn’t know about the stairs. Always just left it in over night not knowing. Thanks.
Your welcome! Others have thought that running it though the magnetize section a few times would help. Its too bad most or all don't come with instructions.
5:58 this is where Technology Connections would cite "by the magic of buying two of them..."
Your not the first one who pointed out I was negligent in not saying that :)
been using these things for decades and i never really considered WHY. thank you so much! :D
Your very welcome! It is a really clever little device.
I have wondered how these work. I debated buying one just to open up, but I wasn't that curious. Glad you made this video
Glad I did - seems like I save a number of these gizmos from being chopped up!
I’ve literally always wondered what they point for the stairs were. I thought it could be just a quick visual indicator of what side you were about to use.
Now I need to go try this myself! Thanks! 😊
I few other people have said that and I think its secondary purpose is as an easy indicator. Really good ergonomics from that standpoint.
Really excellent video, thank you for this clear explanation. About 5 years ago, I bought a screwdriver set with one of these magnetic devices built into the storage rack, and until 15 minutes ago had no idea how to use it! I'm off to the garage NOW to try it 😄
Thanks again, I've liked and subscribed!
Well thank you so much! It is an intriguing little device with way more clever magnetics than one might at first expect.
So glad you subscribed - I really appreciate it - always important for a small channel. Hope you enjoy some of my old - and future videos!
Nice explanation of how these devices work. I taught biology in college and would have loved it had I been able to put together such a nice, concise lesson. Usually I just rambled around a topic until my students either figured it on their own or were totally lost.
One trick which you dont have in a classroom is the ability to edit! You wouldnt believe how much stuff I edit out!
Very cool explanation. Maybe including one of those jars of oil with iron filings in them to show the fields around the tool would make the fields even more apparent.
Yes! Someone even pointed out that you can now get an even easier to use variant of that which is somehow made into a green flexible sheet. Next time!
It would be nice if you used your detector on the screwdriver during the last demonstration with the disassembled demagnetizer. Thanks so much for actually taking apart the demagnetizer!!
You know, its always a struggle as to how long - or short to make a video, and the youtube audience seems to have a short attention span. So unfortunately many things that could be in it get left out .... Glad you like seeing the actual inside of the device!
I've had one of these for many years and never really understood how, exactly, it worked.
It just did!
Many thanks for showing me. :)
Your welcome!!!!!!!
I was given one of these way back in the '90's. First time I used, it was a wow moment. Pretty clever device that doesn't cost the earth..
I have been wondering when these devices first appeared - so thanks to you I now know they were available in the 90s. Will be interesting to see if anyone mentions having one earlier than that.
@@ElectromagneticVideos I bought one in the first half of the 2000's, but was aware of their existence about 5 years or so prior. That puts my earliest spotting of them in the latter half of the 1990's, coinciding with the account of @bertiesworld .
I use that exact kind of one every time I use a new screwdriver. I love it lol.
Great little tool!
Informative! This reminds me of the AC powered tape head degausser wand/tool I bought years ago. The instructions were that the tip of the degausser was to be moved away from the tape heads slowly. The steps on that magnetizer/demagnetizer block make sense now.
I have an AC powered bulk tape degausser and also one for CRTs - very similar in terms of moving away slowly. I did a video on that if you interested: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
I use one of these for my work fixing/ servicing laser printers/ MFDs in an enterprise environment and this simple device makes my work a lot less stressful!
Interesting - never thought about it but the laser printers etc you work on are probably the most mechanically intricate piece of equipment used in homes and offices. With all the screws and tiny parts I can imagine how this little device would be useful for that.
Clear, informative, concise -- well presented! I learned everything one needs to know about this device -- thanks!
Thanks so much! Glad you found the video useful!
Agree here, it gives the information you need in a straightforward and direct manner.
Though,
I wouldn't be disrespectful towards those who prefer a different video style since it'll come down to viewer preference.
You cant fool me, magnets are just magic
And this gizmo sure proves it :)
"Fuckin' magnets, how do they work?"
-ICP 2010
@@curtisyue182 beat me to it, damnit
Electromagnetism as a whole is just magic we understand. It's got some awesome powers.
@@thegenericnerd3189 It sure does some magical things! Sadly because of its complexity, Maxwell never got know they way Newton or Einstein did after figuring out the classical theory behined it.
If I understand correctly, passing the screwdriver over the magnet at those three different heights, in that order, puts the iron of the screwdriver in a close-to-random configuration. The closer to random it is, the less iron shavings it picks up. The goal of the device is to take a magnetized piece of iron and make it as random as possible while keeping the cost of material low and the procedure quick and easy to reproduce. This device accomplishes both objectives well!
You described it better than I did! What a perfect summary!
If your interested in a more detailed look at demagnetization, which is normally done with an AC magnetic field field that is gradually lowered (and is similar to what happens during each pass of the screwdriver) , I did a video going into more detail a while back: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
i have actually never seen those, i didn't even know they existed! Now i know i need one.
I'm sure my videos has inadvertently resulted in sales of thousands of these devices - to bad I don't get a royalty :) . They are so cheap and so useful to have its well worth picking up one if you happen to see one in a hardware store.
@@ElectromagneticVideos the only way i knew to magnetized something is to keep rubbing a magnet over and over (not so different from device), or wrap a coil around object and tap it to a car battery which is not always possible. To demagnetized i had no other way unless to super heat the object, again not always possible, this device makes all that easy!
@@ayumuchan3541 Yes! I really take my hat off to whoever came up with with such a simple mechanism to do it - particularity the demagnetizing part!
When I was in school, we did this with bare magnets; stroke a magnet longways down the shaft, physically touching, to magnetize, stroke through the air further and further away to demagnetize. Basically the same principle, but without a gadget.
Yes - exactly! I vividly remember doing that in school too. Seemed amazing at the time. And it sort of still is!
I've seen these things around for so many years but never used one. Great explanation of how they work.
YT showed this vid as a recommendation and after watching it I watched your about vid on your home page. You now have a new subscriber! Now I have some catch up binging to do.
Hi Bill, welcome aboard! So glad you subscribed - hope you enjoy some of my old upcoming videos!
Really appreciated this video, so I figured I’d leave this comment to hopefully help this video in the TH-cam algorithm.
Thank you so much!!!!! Yes - leaving comments really helps - really appreciate you - and everyone one else who comments - doing that!
This wasn't just a great explanation of how it works, it was a perfect walkthrough of the thought process of how to figure out how it works
Thank you so much!
I have shown using these handy devices many times on my bench and it's really great to see inside and learn the science behind it. Excellent video as always! I Enjoyed it! Thanks.
Thank You! Yes - amazing cheap, simple devices that are so effective!
I used to do oilfield work and one of our tools used the same principle to locate pipe collars in the casing. A CCL or Casing Collar Locator. The main bit of it was two magnets with the same pole facing each other vertically. Between them a coil of wire. The fields hit each other and go straight out a ways radially around the tool. As the tool moved through the well casing, any metal changes in the field induced a current in the coil. Like the mass change where two pipes are screwed together. That then went to the surface via a cable would register on computer software and as raw kicks on a meter directly attached to the line. This device is attached to every tool we ran down hole.
That's fascinating - what a clever way to detect a discontinuity in the casing.
When I was a student I had a magnetics Prof who designed pigs to go down oil pipes and magnetically look for problems. I wonder if that how the pigs did it too?
@@ElectromagneticVideos not sure on the pigs. Never worked on the pipelines. I always worked on the pads. Did what is called wireline. We ran anything from scientific and diagnostic tools to cutters and explosives. And plugs as well. A lot of the scientific stuff was to correlate our logs with drilling logs. For example, we would do cement bond logs on the casing. An acoustic tool that clicked kinda like sonar. The reflections off the casing would chart out on a plot. Showing the general constitution of the material behind the casing pipe. Generally a layer of concrete and then rock formations. Along with that tool was a gamma ray spectrometer and the CCL. The gama tool just reads the gamma radiation in the ground and can then give pretty detailed plots of the rock formations. Mainly detecting hydrocarbon deposits. But many things affect it. That log, along with CCL are used to verify and correlate out well logs with the drilling logs. Basically make sure our squiggly lines match theirs at any given depth. It gets a fair bit deeper, but this comment is probably too long already.
@@cbremer83 It is amazing how hi-tech oil exploration and production is. Not sure of Schlumberger is still around, but way back in the 80s they would show up at my old university around graduation time and hire anyone who had taken the signal processing, electromagnetics and similar courses. I can sure see why fro what you describe.
Never heard of the gamma tool either - fascinating!
I have seen a video on this before but the guy kinda ignored the stairs saying they where just a design thing but you've given a far better developed version of that explanation thank you.
Your welcome! To be fair - its not obvious how the steps could be of use given they are non-magnetic plastic and none of these devices seem to come with proper instructions. It did take me a while to clue in that it was much like the operation of an AC powered demagnetizer: pulling the screwdriver out of the hole makes a AC-like rotating magnetic field, and moving up the steps makes that AC field reduce in strength for each cycle. If you want to see how a AC demagnetizer works, I did a video on it a while back: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
Some times the more simplest things really do amazing jobs very well... Thumbs Up!
I couldn't have said that better myself. An amazingly ingenious little device!
This is a clever device for how simple it is! I could sort of deduce how the magnetizer half worked, but I was totally stumped by the demagnetizer until you explained it.
I couldn't agree more! I was baffled by the demagnetizer - and even after figuring it out, the staircase was a mystery -even after googling it. Took me a while to clue in that it was mimicking an AC demagnetizer as discussed here th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
I like the tool. It has worked for me. Thanks for breaking down the concept, and cutting into it!
The fun part was cutting into it and see what was inside!
I have a identical one, very handy.
Thanks for clearing up the mystery.
Your welcome! It was fun figuring out how they work!
Never even heard of such a device like this before. It’s pretty awesome and I wouldn’t mind having one here in the house. Plenty of times when I had to try and keep very small screws on a screwdriver which was not magnetic. This would solve that issue
Most hardware stores and online retailers have them ranging in price from $3 to $20. I used the $3 or $4 ones. Well worth having one at that price!
This is awesome! I've been wondering about this exact thing for years. Thank you.
Your welcome! Glad I was able to solve a mystery!
I really appreciate this! I acquired one of these many years ago in a box of tools, and I’ve never really played with it..
Glad you liked the video. Those little devices are great to have in a toolbox for that one time you need to pick up hard to reach screw, or for that matter when a screwdrivers is annoyingly magnetized.
You're a wonderful teacher! Thank you!
Thank you so much! Thais what I am aiming for in this channel - to explain things in an understandable way!
I have seen those in stores, but never tried one. At my last job, we had an old ballast from a streetlight connected directly to 120 vac , with a momentary contact switch. If you were quick enough, you could magnetize with it. Hold the switch down and slowly move the screwdriver out of the coil to demagnetize...
If I see one of the gizmos you demonstrated, I'm going to get one and experiment with it...
Well done video.
Thanks!
How neat - what a great example of magnetizing and demagnetizing .
If its of interest to you, I did some videos a while back on how things get magnetized: th-cam.com/video/S21rlwrY74I/w-d-xo.html and demagnetized: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html with a lot of similarity to what you describe.
Keep an eye open for one of those devices - some people even reported getting them free as part of some promotion!
Had one of these stuck to the inside of my supply cabinet for years. Lifesaver
Yeah - great to have at unpredictable times!
i really love the way you say "again"! thanks for a super informative video
Canadian pronunciation maybe? Or maybe a mish-mash of various English accents - when I was a kid my dad was posted to various foreign countries so I went to a variety English speaking schools and used to have an accent half way between Canadian/US/British/South African English. Anyway, glad you liked the video!
Thank you. I always assumed there was more to these little tools than that. Looked up my old mag'r/dem'r and used it with new understanding. Mine does not have the steps, but rather, has a "D" shaped demag area with the curve facing downwards. Magn'tzd a driver, then put it in the demag at the bottom and slid it up to the top while withdrawing and it worked perfectly.
Your welcome! I haven't come across one like you describe, but it sound like a similar process - gradually reducing a changing magnetic field as the screwdriver is pulled though the demagnetizer. I'll have to keep my eyes ope for one like you describe!
Very detailed and high quality content! Thank you!
Thanks! I appreciate the compliment!
I have one of these but the markings wore off of it a long time ago and I had forgotten which one was mag and demag. I also never knew what the stairs were for. Much appreciated explanation.
You must have an old one! So far, I have not found out when the stairs first appeared - looks like the original did not have them. Its too bad that none seem to have an explanation of what the stairs are for.
Thank you for this video. I'm now trying to visualise what the inside of my Wera Star one looks like. It doesn't have any holes in it like the normal types.
I also see that you are taking the time to reply to everyone's comments. I think that's excellent!
I had to google Wera Star - never seen that before! I'll have to get one (or two) and figure it out sometime. Like the one in this video, its not obvious how it works but will probably be obvious once its taken apart.
I always try and answer comments - I appreciate when people take the time comment. And - as in your comment - there is often something really interesting in them. Its actually turned out to be fun. So thank you for commenting!
your voice is very relaxing and this video was very informative. thank you!
Thank you! First time a comment told me my voice was relaxing :)
@@ElectromagneticVideosvery true!
@@glottalstop2080 I'm amazed!
It's called ASMR :)
@@sprockkets :)
I have one of those exact magnetiser/demagnetisers, I always wanted to know, How? Now I know and understand how they work, thanks for that.
Your welcome! Glad I solved the mystery for you!
Amazing! Had one of these for years on my hobby bench inside and although I figured out how to magnetize by fooling around, I had never been that successful demagnetising. I've never taken the gizmo seriously, so thanks for the explanation!
Glad I was of help! To demagentize well you have to be careful to pull the screwdriver out all the way each step, and then insert it one step up. If its slips down when inserting, repeat at that step and the move up.
I have precisely the same magnetizer, and I always wondered what's the function of those stairs. Now I know, thanks.
Your welcome! I took me a while to figure out the purpose of the steps. I suspect decades ago there was an instruction manual with the first version of the device describing how to use it, but somehow over time that information got forgotten.
Very informative video! The drawn picture really helped me understand how it worked. I may never use this information but hey, now I have it.
Thanks! Yes - sometimes its just nice knowing even without an actual use of the knowledge!
Thank you, Dr. Jones! I need to get one of those!
I put the one I didn't hack apart in my toolbox. Well worth the few $ next time you are in a hardware store!
Excellent explanation. I like the demonstrations. The drawing was helpful in me understanding!!
Thanks! I always feel is picture is worth a thousand words - although I do wish I had fancier graphics sometime!
I’ve used these for decades. Great tool! It works!
Yes - so handy to have when you need it!
As a teen in the 70's I remember my dad using his Weller soldering gun to magnetize his screwdrivers. He would wrap several loops of copper wire around a broom handle and connect the ends to the gun. Remove the broom handle, pull the trigger, slide the screw driver inside the coil, and voilà the tool was magnetized. I wonder if your magnetizer tool existed back then!? 🤔
What a neat memory. The trick with magnetizing things that way is to turn the gun off while the AC field is at its peak so it leaves a string field in the screwdriver. Leave it on and pull the screwdriver away gradually and you can demagnetize the the screwdriver. I did a video that includes a Weller soldering gun doing just that here: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
You know, I would be so interested to know when someone invented this little device. My guess is 1960s is the earliest it could have been developed because thats when plastics became in widespread use making it simple to manufacture. If anyone knows when they first appeared, or what company made the first one, please post!
Great job, I’ve wondered about this for a while!
Thanks! Glad to have solved the mystery!
I didn't even know this product existed. Thanks, man. You earned my sub, bell and like. Keep up the great content
Thank you so much! I really appreciate every subscription and like and it does help the channel greatly. Hope you enjoy some of my previous and future videos!
Oh.. I should have taken one of these apart myself.. Woot! thanks for sharing
They are intriguing little devices!
The only way to really demagnetize a tool is to use a coil from an old solenoid valve. You only have about 30 seconds to do it because the coil will get hot, but i guarantee you that it will be totally demagnetize. 😁
Yes! This gizmo does a decent job but an AC field is really the way to do it. I did a video on that here: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
Awesome video, very informative and all facts with no filler! I subscribed in hopes of seeing more great content like this.
Thank you so much - so glad you liked it! I always try and present things much in the way you describe. The general theme of this channel is to make things understandable without the science and math background that would normally needed. Hope you enjoy my future - and old - videos!
Absolutely incredible video. Thank you!
Thank you so much!
I have some speaker magnets on my bench and i use them to magnetize my screwdrivers, and it works like a charm!❤
You cant beat speaker magnets - they are some of the best - probably work better than the gizmo in the video too.
You’re voice is so soothing, it’s making me sleepy in good way
Someone else said that :) Not sure if that's good if it puts people to sleep before the end of the video!
Great video !!! I always wondered how they actually worked on the inside. I had maybe a very vague guess, but I didn’t think it was that simple. The diagram really illustrated it clearly.
As I started watching the video, I thought: “he should get one of those green nanoparticle sheets that show magnetic fields” but then I saw the probe which is fantastic. I’d never seen one like it and was going to ask where it was from but then saw the link you posted on another comment.
In any case, thank you so much for taking the time to make an original educational video about this ubiquitous little device.
Woe - I had not seen those green magnetic field display sheets - just googled - will definitely have to get one! There used to be viewers to see the field on magnetic tape for editing, probably a similar device.
Glad you found the link to the magnetic probe - here it is again in case anyone else needs it www.indigoinstruments.com/magnets/accessories/magnetic-force-3d-compass-magnaprobe-44702.html
Glad you liked the video. I enjoyed figuring out this neat little device!
My first experiment with magnatism (even though I wasn't aware of it as such at the time) was as a very small child, when I put a magnet onto the screen of our home CRT colour television. So enraptured was I by the effect (all those pretty colours in rainbow arcs) that I drew attention to the spectacle to my mother, who told me to 'stop doing that immediately' - I'm paraphrasing.
😂
Ha! Me too actually. But both you and me were lucky - one commenter did the same but either had too strong a magnet or held it too close and apparently permanently magnetized the some part of the tube (shadow mask maybe?). Apparently none of the TV repair shops could fix the color shift and the TV had to be replaced - oops!
Cool. I always wondered _exactly_ how these things worked. I understood he concept but never fully understood how exactly the tool was interacting with the magnetic field. Thanks, buddy.
Your welcome! Its really quite advanced magnetics that your wouldn't expect to find in such simple little thing.
I got a demagnetizer that's over a hundred years old. It's a watchmakers tool. It's a coil of wire in a case with a switch that looks like a telegraph key to pulse it on.
You can really feel the pull of the magnetic field when you pulse the switch with something metal such as a file inside the coil.
This pull is probably where guys got the idea to build magnetic pulse guns.
What a cool vintage piece of equipment!
I did a video on coil type demagnetizers a while back in case your in interested: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
@@ElectromagneticVideos Look up "Vintage South Bend pocket watch demagnetizer" with a Google image search and you will see models like mine. They go for around $100 bucks as antiques these days.
Had been wondering about this, thank you for the wonderful explanation!
Thank you! So glad you found the explanation wonderful!
Hi buddy, just came across this video, and wow, I never knew what the steps were for, mind blowing video Thankyou.
Keep up the great work mate, sub’d and liked, now going to watch the rest of your content. 🤙🏼🇦🇺
Joe from Australia 🤙🏼🇦🇺
Glad you liked it and thanks so much for subscribing! Australia - I spent two months exploring the eastern edge of your country a while back - what a wonderful place! Regards from Canada!
I keep one of these near my desk/workbench. Very handy indeed.
Yeah - useful at the most predictable times!
Had problems demagnetizing completely . Now I know. Thanks alot. Others say that stairs doesn't do anything because it's empty inside and just for show. ;D That's youtube for you
In fairness to other youtubers , these devices don't seem to have instructions on how to use them, and to deduce why the staircase is needed does take a bit more than an elementary under standing of magnetics, although its pretty simple once you understand it.
Hope this solves your demagnetization issues. If not, see if you can find an old AC powered bulk tape demagnetizer which should be able to an even better job.
Just tried and this simple stairs solution helps. Sometimes it takes a couple of times but definitely works :)
@@christopherismcaceas4868 I found the same thing - I think it has a lot to do with positing the screwdriver just right for each step. If it dips down towards the magnet it can re-magnetize itself. Not a perfect device, but amazingly effective for its simplicity.
awesome! one lifelong mystery solved, thanks.
Great!
I knew this worked just didn't know how it worked, very cool. Thanks.
Its is cool!
First got one of these at Princess Auto in the clearance aisle when I was about ten years old. I was mystified. Lovely to see the mechanism broken down like this
I just looked - they still have it! Funnily the Canadian Tire website also has one - with the magentize and demagnetize labels flipped. Next time I'm in the store will have to see if the real devices also have the labels wrong.
Glad you enjoyed the video!
Really clear and logical. Thanks for explaining ❤
Your very welcome! Glad you found it clear and logical - thats what I always try for!
I feel like you could of mentioned the difference it makes if you have a hardened steel, from the screwdriver, vs untempered soft steel, on magnetization. PS I love the simplicity of the device. Thanks for the explanation👍
I get your point - but I'm sure you have also found that it is always a tough call as to what to put in a video and what to leave out. I find that the attention span of the general youtube audience is such that often keeping things to a minimum is better and so I purposely left out the aspects of different magnetic materials.
A while back I did do a couple videos about magnetization in case your interested:
Magnetizing: th-cam.com/video/S21rlwrY74I/w-d-xo.html
DeMagentizing: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html
Just looked at your channel (actually just subscribed). see your from the UK. Regards from Canada!
@@ElectromagneticVideos I know what you mean, I have definitely made the made mistake of adding too much information in my older videos🤔. It's finding the right balance of getting your message across(and keeping attention spans) without compromising too much. Thanks for subscribing👍😉
@@MyProjectBoxChannel Yeah - you wouldn't believe how much stuff I cut out of the final video before publishing. Well actually you probably do :) Anyway, looking forward to watching some of your videos!
Apple Stores has these in their repair rooms for techs to use them on the screw drivers to make it easier for the tiny screws used in devices to be picked up. I never just inserted my driver bits directly in, but just run it along the insides in a quick circular motion
Nice to see the simple science behind it!
Interesting! Someone mentioned watchmakers using them - I never thought about modern miniaturized electronics but it sure makes sense that Apple fixers would find them useful.
It’s a fact, you can learn something new everyday! Great video 👏🏻👍
Glad you liked it! Its always fun to learn something new - I was amazed how clever the simple design of these devices is.
Thano you kind sir, for sharing your knowledge!
Your most welcome! Thanks for saying that!
Thanks for making this video. I learned a lot. 🙂
Your welcome! Glad you got something out of it!
this was a midnight thought as I was trying to sleep just a few days ago. thanks boss
:)
Very cool video! Sometimes simplest is best when the physics behind it is sound.
Yes - the old engineering saying: KISS - keep it simple stupid!
Had a mate come around and he grabbed a tool out of my drawer and saw my mag/demag tool. I told what it did but he simply wouldn’t believe me. I showed him and his mind was deadset blown. Hilarious.
Thats funny. But it sure shows how amazing this type of little device is!
@@ElectromagneticVideos
Sorry, I forgot to say thanks for the good vid. 👍
@@michaelslee4336 No worries - thanks very much!
Good video that mate, you have a good voice and demeanor for youtube videos like this.
Well thank you so much! Glad you liked the video - and my voice :)
Thanks a lot for your nice explanation .
Thanks so much! Appreciate that!
Nice video - I have one of those I picked up somewhere , not sure I have ever even used it yet but will !
Thats it for sure - and maybe how they are marketed - cheap enough to grab knowing sometime maybe way in the future it will make some impossible task easy.
Excellent video. I will be buying one!
If you can, test it in the store. A small number of people have reported getting one that didn't work, sometimes missing magnets. I suspect for the low prices these things sell for, quality control is minimal!
How exciting! I'm going to buy a bunch of these and hand them out to my friends!
Try one first - apparently some manufacturers versions of them don't work that well. And it doesn't seem to correlate to cost - the two I got were the $3 or $4 ones- the cheapest and worked fine.
This is fascinating! Thank you for making this video for us
Its is a fascinating little device! So glad you liked liked the video!
Hello, Dr. Jones. Thank you very much for the fast reply. You got a new subsciber !!
Kind regards from Tenerife/Canary Islands.
Wow - the Canary Islands! Thats a first for my channel! I have a large number of viewers in continental Europe, but until now didnt know anyone from the Canary Islands was watching. The Canary Islands have always been on my bucket list of places I would like to visit - looks like a wonderful place. Well welcome to my channel - hope you enjoy some of my old - and future - video!
Hello, Dr. Jones. Your channel is very interesting to me as I am interested in electronics. I have also learned it.
The Canary Islands are a bit like your background image "Hawaii".
Here in the south it is always warm all year round. 25-35 Degrees, never below 20 degrees at night. Very little rain!
The water is turquoise to dark blue and very clear. Important: No sharks! Only turtles, dolphins and whales.
Your right decision to come here.
And then you are my VIP!
For an impression, have a look here:
skylinewebcams, then canaries, then tenerife.
Sunny greetings@@ElectromagneticVideos
@@ElectromagneticVideos Hello, Dr. Jones. Your channel is very interesting to me as I am interested in electronics. I have also learned it.
The Canary Islands are a bit like your background image "Hawaii".
Here in the south it is always warm all year round. 25-35 Degrees, never below 20 degrees at night. Very little rain!
The water is turquoise to dark blue and very clear. Important: No sharks! Only turtles, dolphins and whales.
Your right decision to come here.
And then you are my VIP!
@@pennylane8859 It sounds a bit warmer than Hawaii, and not as much rain. I was always fascinated by the Canary Islands after reading about them as a kid, probably in an old National Geographic. One of my friends took his family to one of your Islands a few years ago for winter vacation (Canadians like to go somewhere warm in the middle of the winter) and really liked it. No sharks is always a good thing! Who knows, maybe in a few years - see you then :)
You re welcome, Dr. Jones @@ElectromagneticVideos
really nice explanation of the unite.
as a little kid this thing was magic to me. still is in a way. but i have long understood the principles behind it.
"was magic to me. still is in a way" - so true! It really is an amazing little device!
Awesome! Thank You very much for this video.
Glad you found it "Awesome"!
@@ElectromagneticVideos Your knack for breaking down complex concept into simple, clear visuals is impressive and incredibly helpful. That's what makes this video truly 'awesome' :) Have nice day!
@@jarekdomanski7985 Wow - thank you so much! That's exactly what I try and do on this channel - make things understandable without the need for years of background science and math. Have a nice day too!
Brilliant thanks 😂 ive had one of these for years, never really understood it!
Your welcome! Glad I solved a mystery!
Very underrated channel, hopefully you will get more subscribers.
Thanks - I really appreciate that. I don't pester people to subscribe - I find it so annoying when other channels do that but I'm sure I pay for it by having less subscribers. And I very much appreciate everyone who subscribes!
@@ElectromagneticVideos I don't think that asking for subscribing works to be honest, in my case it has the opposite effect and if it's excessive I often unsubscribe. You just have to be patient and the views and number of people watching should increase. Anyway, you have now at least one Polish subscriber :).
@@wszczebrzeszyn I fell exact;y the same way! What I do find is some videos for whatever reason suddenly get popular and I get a bunch of subscribers in a matter of days, and then things quite down for a while. Truth is, I have had a lot of fun with this channel - doing experiments and projects that I would not normally have made the time for, and also have nice discussion with commenters.
That for subscribing! I have quite a few viewers from Europe, although no too many from Poland. Welcome aboard, and greetings from Canada!
I just bought one of these after seeing your video !
I guess I should have cut some sort of a deal with the manufactures :)
Great explanation and demonstration. I always expected that you would need an active electromagnet with AC input for a good demagnetizer but obviously the simple setup in this device resulted in very good demagnetization.
Thanks! That's what I thought till I looked into the ingenious little device. I'm not sure how well I explained it in the video, but as you pull the screwdriver out of the demagnetizer each part of it is exposed to a magnetic field that changes direction as it weakens. The effect on the magnetic domains in the steel is much like an AC field, and moving up the steps is like gradually moving the object away from an AC demagnetizer.
@@ElectromagneticVideos I think the video was clear and I understood it like you described here. I was simply surprised that such a simple method worked so effectively.
Excellent, thanks ❤
Thank you!!!
Thanks, loved it, I have one, and a matching screwdriver, and screw jars like yours
Glad you enjoyed it. Actually I wish I had more jars that size - really handy for smaller quantities of screws.
@@ElectromagneticVideosI just use empty spice jars
@@orngjce223 great idea - they are the right size!
Great video. Great narration. Great job.
I already knew. I think I saw big clive explain it at some point. Anyway happy to see somebody else at it. You earned a sub and you deserve many more!
Thanks you so much and hope you enjoy my other videos! I really appreciate you subscribing - very important to small channels like mine! I didnt know big clive did videos on topics like this - I sometimes watch his teardown/reverse engineer the schematic videos which are often very instructive!
@@ElectromagneticVideos I checked my YT history and I was indeed mistaken.
It was Brainiac75 who made a video about it in Q3 2021.
@@herzglass No worries! I'm sure big clive could have made one - I was wondering if he had a different variety of things on his channel back then.
Very good!
Thanks you so much!
Brilliant video, to the point. Thank you. Please could you explain how a cassette tape head demagentizer works/
Thank you! Well I actually did a video on AC demagnetizers including bulk tape demagnetizes. Not the same physical shape as a tape head demagnetizer, but works in exactly the same way. Here it is: th-cam.com/video/mGK8oYdEqyE/w-d-xo.html Enjoy!
This was a nice learn. I always thought these were fake. I have bought some from brick and mortar shops and online. I even got a free one with an amazon purchase a while back and just tossed it. Reason being is because over the years I never got a single one to work. Some even said to insert and leave over night. I have never purchased a name brand one. I should have done the effect was real though considering how many times I have magnitized things while drilling and so forth. While welding you even come across random items that are magnitized.
I must admit I was skeptical and then amazed how well it worked. At least one brick and mortar store has their store brand one's magnetize/demagentize silkscreen labels swapped - at least on the online add. So I'm sure that has made it look like it didn't work to many. With the way things are these days, I also wouldnt at all be surprised if some really were fake and lacked the magnets.
I only paid $3 or $4 for these ones - so if you find a working one at that price - well worth a try. I'm sure I will be happy to have it sometime I need to pick up a screw from some hard to reach place.