How Do Smart Magnets Work?

[BariumCobaltNitrogn]

I have some of these magnets. The magnets that repel when you twist them is a cabinet door latch and the smart one with the tiny field lines is to hold a cell phone on the dashboard, where you place the metal plate inside the back (or attach to the outside) of your cell phone's case. The magnetic field doesn't go through the plate into the cell phone. The magnets that click and hold only in certain spots are for drawers on boats so they hold in almost any position, and the magnets are bars instead of circles, so when you open it, it will stay in place while you look into the drawer, then almost closed, then closed. The ones that repel until you push them together will keep a window open just a little bit, but latch it closed when you push the window down with no mechanical parts. These magnets are pretty cheap too, only a few dollars each.

[bradleypmayo]

They're called correlated magnets. My late friend Larry Fullerton invented this technology. Glad to see it trickling out to the masses.

[TheTubejunky]

Uses for these:
No friction knobs, buttons, controls, Vehicle breaking, shock absorbing, camera stabilization, high accuracy servos.... AND SOO MUCH MORE!

[skpapic]

"when they are too far apart, it wants to be closer together, when it gets to close, it will get repelled at a distance"


*Welcome to the Friendzone*

[Gamayun.]

I love how you can constantly find experiments and demos that I’ve never seen anyone do before

[Fx_Explains]

I've made something similar when I was a kid 6:35. I use to remove radio magnets and play with them. Sometimes I try to put a smaller magnet into another magnet with bigger diameter.

[JavaRivers]

That one that repels until it gets close enough could be used to demonstrate chemical reactions. The two parts not only have to be oriented to face each other but have to have enough kinetic energy to overcome the activation energy.

[Codebreakerblue]

I'd be really interested to see an RC car or similar using the second type of correlated magnets as suspension

[nklevrname]

I remember looking into these a few years ago. I think the complex patterns were pretty new tech at that point. Watching the way they're made is incredible. So many awesome applications for these magnets. Kinda surprised I haven't seen them become more mainstream yet

[skuzlebut]

There's a Smarter Every Day video where Destin visits the company that makes these. They do some pretty amazing stuff.

[Jgfhujnggg]

One of the best most enlightening one over all so far, answering those small life questions.

[richardduerr]

Holy crap! I did not know this about magnets, and I have so many magnets because to me they almost seem like magic, but I know basically the physics inside them. This video blew my mind! I have my fridge covered in refrigerator magnets and rare earth magnets, one that I cannot remove no matter how hard I try. I love magnets, the apparently invisible force they display, just like helium balloons do, fascinates me. I knew we can create magnets and electromagnets, but I didn't know we could imprint magnetism like that. Thanks for this mind-blowing eye opening video!!!

[davidbronke]

Would have loved to see you go into Halbach arrays, since they're commonly used on refrigerator magnets. They're the reason why the magnetic field is so much stronger on one side than on the other.

[matthewderden]

Dude I gotta say that was one hell of a job explaining how then complicated things work. I was so surprised how well you we able to make it understandable

[kastro]

I literally had to go to the fridge and test the flat magnet step thing. Never before had I noticed, so cool!

[THE_ONLY_GOD]

Thanks for posting that link! Here is a great video idea for an experiment I would like to watch: molten aluminum levitating in a stack of coils so that the phases of energizing the coils move the molten aluminum up. Sort of a three phase linear motor. Thanks in advance for making that video and posting that soon.

[surendranmk]

Only one thing to say, you are ofcourse a fantastic, amazing experimenter in the modern world of science!

[suhaschelian]

Love it! Didn't know fridge magnets are smart magnets (8:33)

[ariesmars]

Very clever and new to me. Thanks for educating me about it.

[vivekmittal]

Dude you are awesome. I always come across your videos across the internet with only your voice and your hands doing cool things.