The plasma pencil is a peculiar object whose working principle is pretty simple. It consists of 2 disk-shaped electrodes that have the same diameter, separated by a small gap. Each of the electrodes is made of a thin copper ring. These rings are attached to the surface of a perforated dielectric disk that is located centrally. This engraver/micro torch is an amazing tool which works on different materials.
If you’re into engraving wood but you don’t want seeing a lot of smoke during the process, then this is the perfect tool for you.
Additionally, it is a simple yet interesting project that you would probably want to try on your own. Check it out!