College Students Build Endless Levitron

Standard levitrons consist of a magnetic top and base plate, the endless version uses "a helmholtz system; the current runs through them to create a uniform magnetic field inside the apparatus." Video after the break.
Here are some other videos of this amazing phenomenon : Levitron. endless Levitron.
Levitron with Helmholtzspule flys 5 hours Johannes Gutenberg Universität - Germany ..

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- Source : http://www.techeblog.com