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.

contains a laser range finder, digital compass, and a GPS module. The article also states that it contains a mini-computer but we recognize that as an Arduino Mega (thanks to Miguel over at ...

The AN/PED-1 Lightweight Laser Designator Rangefinder (LLDR) is a man-portable, modular target locator and laser designation system. The primary components are the Target Locator Module and the ...