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 ...

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 ...

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 ...

Vape pens have revolutionized the way people enjoy vaping, offering a sleek and convenient alternative to traditional smoking ...