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-… ...

Using laser distance meters as sensors is one of the great quests of hackers ... The only option seemed to be using the Arduino to simulate button presses on the 390B’s front panel.

Krejci’s design, while affordable, offers an 8×8 resolution, which is the maximum output of the AMG8833 infrared sensor array. DIY Arduino thermal camera Watch this video on YouTube .

Arduino Infrared Touchscreen Music Controller ... An IR laser at each corner shines IR light across the surface of the screen. ... towards an array of 64 IR sensors.