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.

[Shingo Hisakawa] sent in a tip for a for a neat little box called the Levistone that tracks the Internation Space Station with a laser. His video log goes though all the steps for this great little ...

Jon Bumstead has created an awesome Arduino powered 13 note midi harp after receiving funding from the optics group Spectra at Washington University in Saint Louis.

Bozkurt explains a little more about the inspiration and construction of his Arduino star pointer and tracker.

Australian researchers say they are developing a laser tracking system that could prevent expensive collisions between space junk and spacecraft or satellites in the Earth's orbit.