Everyone interested in electronics should build at least one Tesla coil ... and lots of wire of course. You can see the coil, an explanation of the design, and a comparison to a cheap kit in ...

When you push the magnet through the middle of the coil, an electric current is produced in the wire. The current flows in one direction as the magnet is pushed in, and in the other direction as ...

Equipment: A flashlight connected in series with a wire coil, a small (~2L) dewar of liquid nitrogen, safety goggles and safety gloves. What it does: When the coil is at room temperature, the ...

Then attach one clip to the base of the audio cable jack, and the other end to the tip. Press 'play' on the music source. You should hear music! The electric current runs through the coil of wire ...