Who needs a 1920×1080 OLED display when you can have an 8×8 matrix of LED goodness? That’s the question [Kathy] asked when she built this LED matrix light pen project. It looks simple enough ...

A pen-shaped, battery-powered document scanner might be a secret agent's dream ... Beneath the DocuPen, a bloom of green light shows you that it's working.

34 thoughts on “ Light Pen Draws On LED Matrix ” Brian D (@ ... The ‘off’ LEDs can be made to be emitting arbitrarily tiny amounts of light, really, by just scanning faster. Report comment.

Once a Kickstarter project, we take a look in our WorldPenScan X Review at a portable pen scanner and translation device for Android, iOS, Windows, and Mac.