A cold cathode is a cathode in a gas-filled electron tube that is not heated by a filament. The voltage potential within the tube is sufficient to ionize the gas and cause the current to flow.

Finally, cold cathode lights can be used for much more than illuminating the inside of your computer or making your whip look like it can hover. [James] discovered if he varied the voltage going ...

The subject of this tutorial, the Hitachi S-4700 FE-SEM, utilizes a cold cathode field emitter composed of a single crystal of tungsten etched to a fine point. In scanning electron microscopy, ...

In this case, only four of the eight on the board are used to control red, white, blue, and green cold cathode tubes. The video after the break shows the device randomly rotating through different ...