Globo levitante de 15cm, desenho antigo

The world's first CCL, Computer Controlled Levitation

The electromagnetic suspended globe is an impressive high-tech device.
A magnetic field sensor permanently measures the height of the floating sphere.

The sensor and the electronics in the base control an electromagnet in
upper part of the bracket and thus control the distance between
Sphere and magnetic head.

An additional permanent magnet in the base holds the sphere safely on the frame when the suspension mechanism is switched off.