We can use them to cut things, create laser light shows, and also as a rangefinder.[Ignas] wrote in to tell us about [Berryjam’s] AMAZING write-up on creating an Arduino based laser rangefinder.

I built a 3D printed, scanning laser confocal microscope so I could collect 3D surface topology and profilometry data! The ...

But if you’re just getting your feet wet and want to mess around with different playfield configurations, start with something like [joesinstructables]’ Arduino Laser Pinball. It’s made from ...