Most Hackaday readers are no doubt familiar with the Faraday ... enclose it in a metal box; but if you want something that you can experiment with, you’ll probably want a cage.
However, a compass does work inside a Faraday cage because the cage does not block the earth's magnetic field. Constructed of a metal mesh, current is conducted on the cage itself. It was invented ...
A radio is able to receive signals and make sound when outside a Faraday cage. The cage blocks the signals when placed over the radio, silencing it. The cage gaps are on the order of centimetres, but ...