[Ilia] created a phase laser rangefinder (.ru ... It’s all an impressive amount of work with a hacked together set of optics, a cheap dev board, and a few components just lying around.

Lasers are some of the coolest devices around. 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 ...