Levitron

[elementcollector1]

For my next project in physics, I would like to build a Levitron, similar to those spinning toys. I've seen many instructables on how to build these, but they almost always came out with next-to-no levitation, whereas a demonstration I saw recently had at least a full inch or two going, and was stable (the guy mentioned something about stabilizers on the edge of the device to knock the object back to center). Before I start this project, I need to know if the intended use is feasible, and thus have a few questions:

 

 

-Is it possible to extend the reach of the magnetic field (i.e. to 5 inches or greater) without a significant loss of strength?

 

-Is it possible to rotate the device at a perpendicular angle to the floor and still hold the object securely in place?

 

-How low of a power source can this device run on while still working? I'd prefer a 9V battery or something, but plug-in is absolutely not an option.

 

-Approximately how costly would it be to build a working, good version? I'm willing to sacrifice quite a bit of money for this project.

 

I'm expecting people to say 'this is impossible', as I'm new to the field of magnetic levitation, but I'd like to see if this is a potential project.

[elementcollector1]

As it turns out, those requirements were a little too extravagant (as you may be able to tell). I've narrowed down the requirements to a few specifics:

-Fairly small (within the size of 3" by 8" by 3")

-Battery-operated

-Can levitate sideways?

 

A bit like this, but with the levitation extending out the barrel instead: http://hackaday.com/2012/10/11/hackadays-portal-gun-actually-levitates-a-companion-cube/

 

As you can see, the main part of the levitation device is tiny, measuring in at just about 2" by 1.5". But the levitation, as noted by the article, is weak - the device cannot be moved without disrupting it.

The prop I have in mind also has three claws and a hollow barrel, so would it be possible to take more than one of those levitation toys and attach them to each claw (and possibly one in the center)? I don't think that each device would interfere much with the others, but then again, I'm new to this kind of engineering.

 

Additionally, the lowest expense I could find for just 1 of these was $20 on Amazon. Sites like ThinkGeek offer even more expensive versions, so that's a no-go. A cheaper solution would be welcomed.