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.

Everything you add to your everyday carry pouch or backpack should tick these boxes: lightweight, simple build, and ...

That’s the question [Kathy] asked when she built this LED matrix light pen project. It looks simple enough – a 64-LED matrix illuminates as the pen draws shapes. But how does the circuit ...

The film highlights the potential of computer graphics as a tool for scientific discovery ... circuit design, electronic light pen, programming, visual representation, communication satellites ...