Lumenoise is an audio synthesizer controlled by drawing with a light-sensitive pen on a CRT television. The pen is a self-contained module which connects to the TV via audio and composite video ...

Other uses for old TV sets that you may want to try is to convert your TV into a gaming console, or an audio synthesizer controlled by drawing with a light-sensitive pen on a CRT television.

A light-sensitive stylus wired to a video terminal used to draw pictures or select menu options. The user brings the pen to the desired point on screen and presses the pen button to make contact.