It’s an extremely simple device using an integrated light sensor with built-in Schmitt trigger, but for us the magic isn’t in the pen itself but in discovering how it worked with the Vectrex ...

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.

It’s an extremely simple device using an integrated light sensor with built-in Schmitt trigger, but for us the magic isn’t in the pen itself but in discovering how it worked with the Vectrex ...

Malcolm Lyall-Watson reports for Tomorrow's World on the computer interface of the future - a light pen that can draw directly onto a phosphorescent computer screen. The device, developed by ...

A setup experience will appear and help you customize your pen. The LED light on your pen can tell you when to charge the battery and more. See the table below to understand what each light-state ...