PT 3: Arrays of supermagnets: Bar magnet and compass

[Livingreciever]

Who uses those monitors on that OS anymore?!

[wbeaty]

@Livingreciever who doesn't bother to check the date of a video before sneering at age of software?

[glutinousmaximus]

Sure. These are powerful magnets, but not technically 'supermagnets' For that, you need very low temperatures in which electrical resistance is zero or negligible. Cheers.

[MacEwanMouse]

Yes, but how do they work?

[lnpkural]

That's a much better video than the anti-gravity one

[GHOSTTOYS]

leedskalnin kind of explain it a while ago lol

[qwertzu3]

how does the magnetif field of one of those sphepere look? could you use you baby oil magnetic field "viewer" with this?

[adhdkoen]

I sure hope i can play like a child at that age :D

[SPIKEwillKILL]

what size mm are those balls?

[GrettyBoyCustoms]

The things he played with at the end are called 'oids'

[BaBo0TheBest]

Where I can get that magnectis balls ?

[wbeaty]

> where can I get

Click on (more info). It's over to the right, under the yellow SUBSCRIBE button.

[MrKimo234]

where did you get them?

[itmfnd12]

He pwned his computer screen

[asdasdasdsdfsdfdsf]

magnets i have the same at home :P

[lillen300]

what was the last thing he was throwing up and down?

[wbeaty]

> throwing

Magnet zingers. Buzz magnets. Rattlesnake egg magnets.

[LowDetailGaming]

@lillen300 its 2 magnets when you throw them up in the air, they will hit each other loads of times and make a buzzing sound.

[Ormaaj]

I think its just moving the electron beams which are then hitting the wrong phosphors.

[zapper922]

what are those magnets you are playing with at the end?

[1LilyShell]

i love your videos...glad i found them. i subscribing =)

~L~

[SaberNakai]

You can also buy these from an Edmund's Scientifics catalog as "Bucky Balls"

They are cool,but you do need to be careful when it comes to these.

[tw1sta]

Magnets are fucking fascinating.

[coulditbekronau]

I broke my last TV doing that

[nitrokid99]

question i have a magnet out of a microwave and its a ring why does it screw with my screen

[ipullstuffapart]

its because its a single magnet and u obviously have a crt

[uzzyytt]

:> No idea dude,even fridge magnets fuck up the screen...but when the magnets are so/so you can't take the skrew color off...you can take it off only i taking the magnet really close,and it may fuck it up even harder so...it's pretty dangerous...

[wbeaty]

Old-style TV sets use an electron particle accelerator to paint the image on the screen. Electromagnets cause the particle beam to deflect too rapidly for human eyes to detect. (Wave a pencil in front of the screen, the pencil shadow will bend.)

If your screen gets colored by a large magnet, you can sometimes use the same magnet to fix the problem. Sweep the magnet in a spiral pattern ending in the center of the screen, then pull it away. Then turn it over and push it into the center.

[danielstar007]

Where can I get some of those magnets

[jodex96]

Search neodymium magnet...

[brickman144]

Hmm, maybe it's in the video description.

[gaussman08]

hoop !

[CrazyMonkey124]

What are these, nickel plated?

[wbeaty]

Heavy nickel plating, otherwise they rust quickly just from handling/humidity.

If you play with these for a few months, the nickel plating wears off in the spots where they grind together. (Then you can see the location of the poles!) To "freshen" and remove the crud from a well-used set, pull them apart one at a time and touch them to duct tape.

[CrazyMonkey124]

Ok, Thanks I think i'll get some, magnets can entertain me for hours!

[wbeaty]

the neocube/cybercube/qqmag/iqmag/­buckyballs is fairly expensive. Better to get fewer and larger, like $18 sixty 8mm spheres, cheap from supermagnetman site.

[CrazyMonkey124]

Alright, I'll probably do that then, thanks.

[danratsnapnames]

Thank you Soo much.. you may not realize it, but you have proven why you cannot make electricty from magnitism alone.. when magnets form a chain, they are no longer several poles +-+-+- but become just one pole +-.

[badacerske]

were can i get some of those magnets

[wbeaty]

Youtube videos have this think called a "text caption." It's a block to the right, next to my picture. You have to click on "(more info)" to see it.

[milykalbasi]

wbeaty :D

u know i love your jobs especially about dry ice! Heh! after watching some of your videos i bought 5 kilograms dry ice (5 bar each 1 kilo) and i smoked them all! lol!

can u explain what the differences are between neodymium magnet and ordinary magnet?

[wbeaty]

Neo rare-earth magnets are 10X stronger than the strongest normal magnet.

Tiny ones are safe, but a large neo puck can crush bone. (But big ones do cost a few hundred bucks.)

[danratsnapnames]

ordinary magnets are made by the Earth, while inside the Crust mantal, they are not strong because the magnetic force applied to them is weak, if you heat them, they will still be a magnet... neodymium magnets are made by man. and if you heat them they will no longer be a magnet. this is because they are made in a lab, with a super electromagnet. neodymium is nothing more than very sensitive metal that retains magnetic properties for a longer period of time. just like a floppy disk.

[mcsouthors]

What's a better buy? The 8mm or the 5mm cube?

[ChainsawJulietx]

Lol oidz

[nitro2thonder]

where do you get those things they are so cool

plz reply

[wbeaty]

Umm. Click on "more info?"

Youtube videos have something called a Text Caption over to the right. But you have to click on (more info) to read the whole thing.

[ddrusa]

at the end of ur vid i have those things to

[Eursavion]

lmao that's like saying

Your mother is the fattest person I've ever seen! No offense.

[utmindfreak]

so wait, if i were to wear this around my wrist, I wouldnt have to worry about them sticking to metal by accident because theres no field while in a ring shape?

[wbeaty]

> I wouldnt have to worry about them sticking to metal

The field is only down between the individual beads. They won't jump onto metal, but if you place the bracelet against a steel filing cabinet, they suddenly stick with a few lbs force.

[Zaziclothing]

is that the same effect for cylindrical disc magnets?

[danratsnapnames]

humm.. No.. cylindrical magnets like Speaker magnets are +/- pole oriented differently.. they have + at the top and - towards the bottom so that magnetic force is strongest in the middle.

[frogz]

re: wb that magnet at the end of this vid the magnets making the rattle noise please tell me what are they made of , neo? please comment

--------------

they are called snake eggs, roll 2 of em between your palms and they will repeatedly snap together and apart as the field reverses, it annoys mothers bigtime :D

[wbeaty]

> what are they made of , neo?

Definitely neo, though probably an inexpensive grade. Their field is WAY stronger than a strong ceramic magnet. Their N-S poles are on the sides, so if you epoxy nail heads to the ends and spin them on axis within a 100-turn coil, they make a great little electric generator.

Websites say they're hematite. Nope. Probably someone guessed they're hematite because they look dark silver, then ignorant people have been repeating the same description ever since.

[risecolt]

I need a permanent magnet made of Neodymium with a spheric shape, 600mm in diameter with the weight of 1 metric tonn, generating a 400mm magnetic field and a pull force of 1kn at its highest point.

[GODLYHUMAN]

wb that magnet at the end of this vid the magnets making the rattle noise please tell me what are they made of , neo? please comment

[Chirigami]

I'm pretty sure they are too. I've seen them in my city's chinatown. But they have oblongated shapes, more like a... Um... Like an... Well, just like a deformed sphere. xD Sorry, non english speaker here, that's why I lack some words.

[undergroundterror]

if you take the ball out of the center of the little ring will it be as sensative to the bar magnet??

[wbeaty]

Nope. The center ball *is* the compass. You could jam it into a plastic ring instead.

[ASTURIESM]

you make a compass but, you can't tell which way is north P.S. Granson it drives me crazy too

[lejink]

dude thats REALLY bad for ur screen.. i left a magnet on my desk for an afternoon n the bottom corner of my screen was discoloured from then on- what a piss off

[funkiliciouus]

degauss your screen will get rid of it in most cases

[F0rtyFive]

sometimes that wont even fully work, my tv is still messed up after that happen 2 years ago

[Xenogears85]

Take heart. Even the worst, most messed up screens can be restored.....ironically by the very same phenomena. You may need to search the net for a "how to " vid, but i saw this demonstrated by smearing the monitor w/ magnet 'til it was proper f'cked, then they took something like a hand-held blender(the kind that most resembles whisks at the business end rather than the ones that look like spinning, food processor blades),

[Xenogears85]

and they taped 2 identical small ceramic magnets to the attachment, one on each side exactly 180 degrees apart parallel. They then just started spinning the mag-whisk up against the computer beginning from center of the screen and moving outward in a circular motion all the while gradually pulling away from the screen. It is easier to see it done than to explain it so go and find yourself a vid....but, hope is not lost ^.^

[wbeaty]

Yeah, that works great. Or use a power drill with two large magnets taped to either side of the drill bit, so the poles are spinning end over end.

[ipullstuffapart]

hi i live in australia and i want to buy some neodemium supermagnets do you have any ideas where to buy and how much will they cost

[wbeaty]

> where to buy and how much will they cost

See the links in the video description to the right. You have to click on "(MORE INFO)"

[666evo666]

man i want some of those beads they where awsome

[casey321b]

love those zizzlers they drive my sister nuts!! zizzlers are those things in the end hes playing with that make that rattling noise.

[jeef16]

don't put magnets by your computer

[PikKirby]

poor monitor.. xD

[skierplaterandy]

keep those away from the hd. if they get near that ur fucked

[asmqb7x]

Hard disks have extremely powerful magnets inside them, and how they still work in these conditions is a mystery to me, but I'm also unsure of what happens if an external magnet gets near a hard disk as well.

[wbeaty]

Hard drives have some magnetic shielding, so unless you're using a huge $20 supermagnet, hard drives and credit cards are fairly safe. Just don't stick supermagnets AGAINST your hd.

For a magnet dipole field, the field strength drops off VERY quickly with distance (1/r^3 instead of 1/r^2.) I've accidentally exposed my credit cards to a 10-Tesla superconducting magnet with no problems. But they were about 4ft away from the superconducting coil itself.

[Disneyhater125]

where did you get the magnets at

[gsanson]

right before the "at"

It is very bad grammar to end a sentence in a preposition. I see this everywhere and it drives me wonkers!

[fundash]

i got 60 5mm beads for cristmas, i love 'em

[fundash]

the're grADE N48

[aaaaaaaaaaa426]

i want one of those :D

[tycoonmusicluver]

i want some of those!

[vladimation]

trippy!

[jlohnik]

com p. is crap!

[cometpowell]

You shouldnt do that

[AlienScientist]

Why not?

[cometpowell]

It might ruin your monitor!!!

[AlienScientist]

Do you know how a cathode ray tube works? The fundamental principals behind how a CRT displays color?

watch?v=D3OSTflMO80

The color is a result of electromagnetic fields, an externally supplied magnetic field disrupts the image:

watch?v=s1xS-ssfTM8

This will NOT cause permanent damage to the monitor! You can 'degauss' the monitor with a magnet and a drill like this:

watch?v=j404EgmdXSU

[cometpowell]

If you know all of this, Why'd you bother asking "why not???"

[macchesney]

Hahah.. nice come-back... alienscientist, comet was just trying to be helpful ;)

[cometpowell]

Thanks for the back up

[peterlloydsahler]

People who don't know what they're talking about should not attempt to be helpful.

[cometpowell]

Youre a large capricorn!

[DivinityWithin144]

Cometpowell, my school put on a Christmas play back in the day and one of the main characters name is your screen name. :P

[cometpowell]

Holy crap, i did the same play when i was in grade five, and i was the main character, cometpowell, and thats why my screen name is "cometpowell"!!!

[wbeaty]

It's hard to tell in the video, but the magnets are about 6" away from the monitor.

If you place supermagnets against the screen, the color change will persist, but there are several ways to "degauss" the iron screen inside the CRT.

The real danger is in magnetizing the steel frame. If you place supermagnets directly on the edge of the CRT, Or sit them on the monitor case, you can cause color-warps which can never be degaussed.

[zreiscool]

what is that last thing you were throwing up in the air towards the end of the video?

[wbeaty]

> last thing you were throwing up in the air

look up "buzzing magnets!"  Two hard shiney supermagnets that bounce together.

[ajd150]

where do they sell those message me

[ArcturiusfireW]

take a look at what George Green did with magnets. Think what we could do with super magnets in that configuration. I think our energy problems would be solved to bad anyone who trys to get this technology out gets murdered.

[JackBond1234]

So it's like a magnetic circuit?

[wbeaty]

> So it's like a magnetic circuit?

Exactly. And magnetic substances work the same way: if you break up the little magnetic circuits, and instead align them so the "circuit" is routed through the open space outside the material, you've "magnetized" the material.

Unmagnetized iron is full of tiny and extremely strong "magnetic circuits." All the fields stay inside.

[twobrOs678]

hey man i realy like these i am just wondering how many i should buy because i dont wanna buy too little or to buy way too much

[wbeaty]

> t wondering how many i should buy

It takes 60 to make a buckyball.

I use 8mm, but you could buy lots more if they were 6mm.

[planetdarwin]

wbeaty and viewers... have you heard of a 2d physics sandbox program called PHUN? I think you'd like it. search youtube for examples

[carpenoctem66]

Thats a great program!

[iownnwo]

omg wizzeres!

[DeltaWound]

LOL, that's pretty good. I've got four 1/2" x 2" neo cylinders. They pull like 90lbs of metal each. They scare the $#!+ outta me. XD

[jaysu95]

i have those sound making magnets but where do you get those mini ball magnets?

[wbeaty]

> but where do you get those mini ball magnets?

Click "more" on the video description. Mr. George is having a sale on those right now (March 2008.) Buy at least $21 dollars worth of number SP-1000, the 8mm nickel plate spheres

[retrogamer500]

How long do those magnets hold their magnetism? I've had a few strong magnets for nearly two years and they are clearly not as strong as they were.

[Fentanyl3]

a magnet will hold it's field indefinitely unless they are subjected to impact repeatedly, or heat in excess or repeatedly, in other words, keep them below 150 degrees or so, and don't let them slam together a lot

[fmftrx300ex]

i loved my megnets on my computer screen it looked so cool....smame i have a lcd now

[tortwig1234]

dude r those magnets the one u were spinnig on the end of the vid? those look like my magnets lol! xD r those supermagnets too?

[kidstryke]

...... yes i believe that the super magnets are indeed supermagnets...

[tobigforyou]

these are 8mm magnets? thy cost like .50 each! that's expensive!

[wbeaty]

> these are 8mm magnets? thy cost like .50 each! that's expensive!

I see a sale on right now, $0.30 at supermagnetman dot net. 8mm, sp-1000. You can even buy sixty; he doesn't force you to buy 100 to get the discount.

[r3za89]

Does anyone know where i can buy this thing online?

[URZeroGravity]

So... when its all connected to each other like it usually does...

its just a normal magnet?

and if its not connected the way it usually does..

its a freaking SUPERMAGNET?

wow.. amazing

[wbeaty]

> and if its not connected the way it usually does..

> its a freaking SUPERMAGNET?

No. "Supermagnet" is either a Neodymium-Iron-Born magnet or a Samarium-Cobalt magnet. They are about 10x stronger than other types. Strong enough to give blood blisters if they snap together on skin. Strong enough to cause eye-piercing shrapnel if two of them slam together and shatter.

[wbeaty]

> Thats a great way to erase your harddrive

Yep. Don't place large supermagnets on your laptop!

I've found that supermagnet won't damage floppy disks or credit cards unless the magnet is a couple inches away. It takes even more to hurt a hard drive (since the drive is inside an iron shield box.)

Don't forget that hard drives have supermagnets inside them! To get free supermagnest, tear apart old hard drives.

[KAHULUIMAUI]

Thats a great way to erase your harddrive

[GuinneaPig3]

ya my computer has a degausser that makes my screen go all jiggly 2 :) cool video i checked out ur others ones theyre great as well

[GuinneaPig3]

well thats 1 way to ruin ur computer

[wbeaty]

> well thats 1 way to ruin ur computer

It had no effect on my computer. Of course I have several different degaussers here in case I get into trouble. Also, most modern CRTs have a built-in degausser (which makes a loud buzz when you first turn the CRT on.)

And also I was keeping the magnets about ten inches away from the screen. These are STRONG magnets. That's the whole point.

[joselu90]

think  neutral electromagnetic circle NS-NS-NS-NS(CIRCLE SERIE) BUT IF NS-SSSSS OR NNNN-NS

[MrfixitRick]

Thanks, nicely done, o noble idea-spreader!

[ront2437]

What king of magnets are those balls where you break the ring and then it affects your crt?

[wbeaty]

> What king of magnets are those balls where you break the ring and then it affects your crt?

Look in the text description. Click on (more)

[FFXPWNS]

great places to get magnets :emovendo(.)net emoveno on ebay and kjmagnetics(.)com (i recommend emovendo(.)net)

[3losh3]

where did u come from ???? mars ^^ lol wow i love it

[wbeaty]

> where did u come from ???? mars

I've always wanted to be that weird engineer at the TV station in the Weird Al movie "UHF".

[speedstakerguy]

lol i have the anoying buzzing magnets too lol (the enoying ones lol)

[gabydewilde]

Very interesting :-)

[frankvizza]

Interesting! Fundamental, yet you would not normally read about that effect in a text book. I like the idea you used with the monitor showing the effect of the magnetic field.

[SkullFace72]

I have rattle snake eggs!(the annoying buzzing magnets at the end)

[funkboxing]

Your vids are very educational. Thanks. Just out of curiosity, what is your annual budget for NIB magnets?

[wbeaty]

> Just out of curiosity, what is your annual budget for NIB magnets?

I first bought magnets as a bulk-purchase for Seattle Weird Science Salon. That way we get the wholesale large-qty discount. Later I started selling them at occasional ham radio swapmeets and farmers market weekends. So my budget is zero (actually negative, but I donate any profits to Ballard Food Bank.)

In other words, the owner of the magnet store gets to play with huge numbers of identical magnets before selling them.

[funkboxing]

Nice, very cool. Awesome of you to donate to the food bank. Ever work with magnetic refrigeration? Magnetacaloric effect I think it is called. Gadolinium is a good demo but expensive. Some other alloys work better but I don't know where to get any to expiriment.

[SpartanGuy]

I love that idea to sell the compass at the flea market.

[dasUberkommando]

U should explain what happens instead of just playing :-) Magnetic conductance is smaller in air than in magnets/metals etc.

[PeterPAM7]

nice way to destroy a computer monitor

[wbeaty]

LOL. "No computer monitors were harmed in the making of this video." However, if anything should happen, I have several kinds of degausser coils.

[raynegro]

super cool

[travisl91]

I really like yor videos. especially the magnet ones. I've got a couple supermagnets myself. I don't know why but magnets have always fascinated me.

[blinkys]

what was that in the end of the video? something in your hand, making strange noise.

[wbeaty]

> something in your hand, making strange noise.

search for "buzzing magnets". They're just supermagnets coated with a thin layer of glass. They bounce off each other while fiercely attracting.

[boynamedjack]

i have one and i did a few cool trix to the girls in my class

[elminz]

I saw on ebay, someones selling a 6x2" N48 neodymium Disc. I wonder what that would do to various casino/vending/cash machines...

[DarkTrunksGeorgeSim]

omg now i am in love with neodymium!

Very strong magnetic fields there huh?

[mattsuzanna1992]

its cuz when they are all in a ring or bar their magnetic concentration is focused on each other

[bakirage]

they are pretty cheap on ebay, and as long as you don't expose the monitor too long and to a too strong of a force (i think he is damaging it tho) your crt won't be damaged (you can use degaussto get rid of most discoloration, etc. but if you do it too mcuh it wil ldeform the crt mask itself, which is not repairable.

[wbeaty]

(i think he is damaging it tho) Nope. Notice that I'm not even getting close enough to leave a colored blotch, much less hurting the mask.

If you accidentally make a colored blotch, often the CRT's own internal degausser will take care of it after a couple of days. This degausser runs at power-up, making a large 120Hz buzz.

Other damage: never bring a supermagnet near the edge of your CRT! Avoid magnetizing the steel frame.

[parangetut]

i have a collection of magnets. i have all kinds! Like him

[ICEInterphace]

nice i did not know that

[shoos99]

where do you get those?

[lexmark78]

doesnt that completely screw up ur computer?

[quadraxis45]

cooool

[kingofhippo]

were did you buy them and how much??

[CrayonMan]

look at is, wooop wooop ROFLMFAO! omg uberorbs :D

[sokkaizcool]

coool

[BustaDyme]

where cab I get those beads???

[MrOlafdotcom]

It just basically shows how very directional ball magnets are because of their poles being very defined. also magnet power will "stack" in other words if you have a 1 inch block magnet and 4 quarter inch block magnets stacked on top of each other they will have about the same magnetic pull

[xave2354]

do u have a job? i mean really.

[Noisefrombelow]

ya he sells these magents

[xDIRTYSOUTHx]

HAHA!

[julian1000]

he's not joking

[simonddavies]

what is special about this???

and why are they 'super'?

[SEVlad]

I didn't see anything new here.

[wbeaty]

Also see parts 1 and 2, and my video with the larger liquid helium superconducting magnets.

[MrOlafdotcom]

be careful you don't permanently distort your CRT's shadow mask. I've done that to my Television years ago and the colors towards the bottom edge of my tv are still distorted

[wbeaty]

Good point! It's easy to make permanent color blotches on your CRT. I own several different degaussers and bulk tape erasers, since I use the effect to show bfields during demos. As seen above, if you keep the magnets 4" or more from the iron shadowmask in your TV screen, the color changes won't be permanent. But if you screw up and make a color-blotch, you use a commercial degaussing coil. (Most computer monitors have these coils built in, and will demagnetize during powerup.