Lighting a LED lightbulb using electromagnetic Induction.?

[Universal]

Well, I have technically two questions and they are as following.

 

1.) I found this diagram which I'm sure many of you have already seen, but it's a diagram of Nikola's Tesla's famous no wire light bulb.

http://upload.wikimedia.org/wikipedia/en... the website for the picture. Anyway, I was just wondering if anyone could please explain the diagram and the parts and of course if anybody knows, how it works. As I am a student trying to research upon this topic, I was wondering if anyone could please shed some light upon whether this could be easily built and if so how, and any tips or experiences.

 

2.) A PHD student at MIT (which im sure many have also heard of) has done the wireless levitating light bulb. I am trying to research that and on his website

http://bea.st/sight/levitation/

There is a few schematics, primarily this one as following,

http://bea.st/sight/levitation/resonantT...

Could any please explain the diagram and instructions? Thanks

[ydoaPs]

Two of your three links are broken.

[swansont]

Your one working link does a reasonable intro; you have a transformer primary and secondary, separated by a small gap. What is it that you don't understand? (you need to be a little more specific)

 

If you need to learn about the basic effect, http://en.wikipedia.org/wiki/Transformer

[Universal]

Yes, it appears to be a transformer. But my question is, what if the distance between the primary and secondary is 10 meters apart? And as for the dead links, It works fine on my comp, but if anyone comes back could anyone please search that on google and it should pop on and redirect you.

 

But back on topic, I want to build a device where you can hold a lightbulb in your hand and walk around the room and still have the lightbulb light up in your hands. The first option is in wikipedia "wireless energy" link where Nikola tesla built this device with two metal sheets and allowed a lightbulb to light up between them. The second is done by the MIT guy which has a secondary on the lightbulb itself. Either ways, I'm curious as to how it works so if any one can explain to me how to build one, I'll greatly appreciate it.

 

Again, it seems common these days for transformers to exist but it seems that the primary and secondary have to be reasonably close in order for it to work. Im just curious as to if anyone knows how to make the energy transfer possible over a greater distance, such like 5 meters?

 

Oh my bad, the links are dead lol. Well

http://en.wikipedia.org/wiki/Wireless_energy_transfer

that's the site, the dead link is the site for the zoomed in picture lol, sorry guys

And the second dead links is also a picture from the working site.

[swansont]

Magnetic induction is generallya short-ranged effect (dipoles drop off as r³), but I recall people working on an RF system that used resonant loads, so the radiated power was small until a load came in range, and then the energy transfer was significant. The idea was to recharge the batteries of portable devices automatically.

 

http://www.eetimes.com/showArticle.jhtml?articleID=199903206

http://www.powercastco.com/index.php?page=techover