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Floating lightbulb 2

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Uploaded by on May 23, 2008

This is another movie that demonstrates an implementation of wireless energy transfer, in combination with magnetic levitation, The result is a light bulb(20 Watt) floating in mid-air, while lit.

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Science & Technology

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Standard YouTube License

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Uploader Comments (rmassink)

  • I think he has an alternating current in the coil on the table, which creates a magnetic field. The floating coil with the lightbulb is identical to the coil in the base. The magnetic field created by the base coil induces a flow of current in the floating coil, lighting the bulb, and creating an opposing magnetic field which makes it float. I wonder if he's using some circuit to keep it stable, or if it's self-stabilizing.

  • that is partly correct :-) the coils are like you said identical, and the alternaterneting magnetic field in the base coil does produce a current in the floating coil.

    The coils have a capacitor across to create a resonance circuit, which greatly improves the power transfer.

    The floating is done by a static additional magnetic field, and a static magnet in the disc where the bulb sits on. So the whole system works like a static magnetic field, with a alternating one superimposed on it.

  • Honestly, I do not know exactly why they not interfere, but i can think of multiple reasons;

    1. the frequency of the coil is too high(about 30kHz) to have any physical effect on the mass of the magnet that is floating.

    2. Like in a inductor core, heavy metal rejects high frequency's(core saturates, and cannot adsorb any more energy), so the alternating field does not affect the magnetic iron core much, but instead charges up the floating coil.

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  • I would like to take a look of your circuit too. Cheers.

    What kind of magnetic sense do you use?

  • do this with leds much brighter than that light bulb or put leds in the light bulb

  • Me too !!! can you send me this circuit diagram too ? Please insert in my usuary page of you tube, or can you make a video with explanation very detailed with circuit and diagrams ? how do you balance the magnets, because it is a system unstable equilibrium ?

  • can u send me this curcuit diagram and schematic to my email??? i like this project and wanna make it.

  • Is there any way you could message me with some basic instructions and a materials list for reproducing this? I'd love to give this a try.

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