He used a stepper motor to rotate the object being scanned, and an Arduino ... The Sharp sensor is cheap and decent, but you’re obviously not going to get amazing accuracy. Still, using the ...

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 ... Here is ...

The idea is pretty neat, so [Ivan] decided to implement it for mains devices by making this proximity switched outlet box. A Sharp GP2D12 infrared distance sensor is the key to the system.