The theory behind the device is simple – point a laser at some glow in the dark surface – but [Riley] is doing this project right. Instead of jittery servos, the X and Y axes of the laser ...

Laser engraving is a fun and fulfilling way to leave a personal touch on everyday items. These five projects demonstrate how easy it is to start while producing professional-looking results.

But if you just want a laser lightshow that’ll draw boxes on your living room ceiling, this simple X-Y laser scanner might be a good platform to build.

Afterglow uses a USB camera to track the motion of a laser dot—effectively turning it into a drawing tool or a mouse. Now that is something every boardroom needs. At the heart of the system is ...