How does a Floating Helmet work?

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How does a floating helmet work? I received a helmet of my favorite football team that floats when turned on but once you turn it off it sticks to the, presumably magnet, on the top. It spins while floating.

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the helmet has a magnet in the top of it, and the top of the device has an electromagnet and a distance censor. by varying how strong the electromagnet is based on the distance it can keep the object floating.