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.

The photosensor is a simple cadmium sulfide cell, which measures the intensity of light bouncing back from an object as an Arduino ... detection. And what’s the natural endpoint for a good RGB ...

Four computer engineering students created a walking stick with upgraded features such as GPS and detection sensor to help visually impaired individuals. In 24 Oras' Game Changer feature by Martin ...