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Floating Magnet

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Project by fissionchips posted 1060 days ago 2067 views 3 times favorited 4 comments Add to Favorites Watch
Floating Magnet
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It turns out that it’s impossible to levitate a magnet free-air, thanks to Earnshaw's Theorem. This project gets around that problem with a few guiderails. I used some old bulky speaker magnets to make this, one in the base and two in the capsule (with polarities reversed to repel). When pushed up or down and released, the weight bounces up and down.

It would be fun to machine a version with smooth sliding bearings, as friction is the only dissipating force for the harmonic motion of the weight.





4 comments so far

View hasbeen's profile

hasbeen

88 posts in 1288 days


#1 posted 1060 days ago

Greetings from the socialist capital of America – California.

I like it a lot, but would appreciate information on parts beesides speakers.

Lee
Moreno Valley’s local has-been
Servant of the Living God.

-- I may not have a lot of good ideas, but some of them are just incredible.

View techjoey's profile

techjoey

10 posts in 1069 days


#2 posted 1060 days ago

I like this alot also….. I see this as one of those distracting, thought provoking, desktop items, similar to the suspended ball bearing, kinetic energy models. Additional views would be nice. Maybe one from the side showing the levitation height. I suppose if it had to be made to have a practical purpose, you could have the silver colored rings machined in such a way that they hold photos. But I like it as it is… Nicely done!

-- - No design is perfect - That's why pencils have erasers -

View StumpyNubs's profile

StumpyNubs

6122 posts in 1403 days


#3 posted 1059 days ago

Interesting… if I put enough magnets on my refrigerator, will it move up and down?

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View Razorbak91313's profile

Razorbak91313

87 posts in 1247 days


#4 posted 1059 days ago

Well, one quick way to reduce the friction to is to put a curve on the metal bands of the capsule. If you could find a band that bulged out so that the middle of the band was sticking out a little further then the top and bottom. Then you would just have a small surface contact with the middle of the band and the rods.

Or design a new setup that used a single rod through the middle of the capsule to holp it in place rather then 4 outside rods.

-- Turning good wood into even better wood jewelry. DWWoodCreations.com

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