Let’s face it, levitating anything is ... A microcontroller implements the PID system, varying the current supplied to the electromagnet to keep the speaker floating at just the right height.

It would be really fun to do an entire hallway of these levitating wireless lights ... This part of the system pulls 0.5A at 12V, bringing the whole of the consumption in at around 9 Watts.

Designed to reach record-breaking speeds, this levitating train could revolutionize ... a high-speed magnetic levitation (maglev) system that combines vacuum tube technology with electromagnetic ...