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.

[Fandonov] has created a weather station project with an Arduino Uno at its heart and a Waveshare ... aside from Arduino and display it boasts an Adafruit sensor board and a hardware clock.