Floating sphere (Levitron)
The functional principle:An electromagnet (coil) is turned on. The magnetic sphere gravitates towards it. When the sphere gets near the magnet sensor (Hall sensor), the sensor reacts and turns off the electromagnet. In the following, the sphere descends again. The magnet sensor then turns the electromagnet on again and the cycle starts anew. This happens approx. 70 times per second (depending on the distance and the weight of the magnet). That's how the magnet levitates.
Finish:The cupola with the coil and the sensor is only lodged between the brass bearers. An o-ring (black) provides additional stability. The Hall sensor SS495 is situated in the small "bump" below. The cupola is closed with an aluminium lid.
Note from the supermagnete team: Other beautiful levitating objects can be found in the project Liquid Levitation Sculptures.