Sometimes the simplest of projects end up revealing the most interesting of things, as for example is the case with [Ryo Mukai]’s light pen for the Vectrex console. It’s an extremely simple device ...

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.

If you worked with computers back in the 1970s, there’s a good chance you used a light pen at some point: a simple input device that you’d point at the CRT screen to highlight text, choose menu ...

Impatient molecular biologists who need to know – now! – if their gels are done, have a new, pen-sized ally. Rather than carrying their gel trays to the dark room, they can whip out the diminutive UV ...

A tiny 3D-printing pen called Creopop will enable you to create prototypes on the go. Printing with non-toxic resin ink, this device will be useful for engineers, designers, artists, and others who ...

Physicians and repair engineers often use small light pens for visual examination Spurposes. Rugged and expensive as these pens may be, their weak point is the bulb, which is a ‘serviceable’ part. In ...