Empty coke bottle
Wrap a coil around where the lid is supposed to go
find a magnet that just goes through the small hole; place the magnet on a table and the lid part on it so that the bottle is sitting upside down on the table
Connect wires to an A.Current supply, and that the frequency of the AC can be varied.
Ta-Da! by varying the frequency of the AC, at about 300-500 Hz notes can start to be noticed.
If the machine that provides the AC can be plugged into an ox cord, you can hear low quality music through it.
Wrap a coil around where the lid is supposed to go
find a magnet that just goes through the small hole; place the magnet on a table and the lid part on it so that the bottle is sitting upside down on the table
Connect wires to an A.Current supply, and that the frequency of the AC can be varied.
Ta-Da! by varying the frequency of the AC, at about 300-500 Hz notes can start to be noticed.
If the machine that provides the AC can be plugged into an ox cord, you can hear low quality music through it.