I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller and a piece ...

Your phone would lose a long list of features and basic functions if it didn't have proximity sensors.

iPhone and iPad users are already very familiar with something called “proximity pairing.” First introduced with iOS 11, this feature lets users transfer backup and other data from one device to a new ...