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 ...

This project demonstrates real-time object detection using an IR (Infrared) Proximity Sensor interfaced with an Arduino Uno. The system detects the presence of nearby objects without physical contact ...

What if your Arduino could notice someone getting close without touching anything at all? No buttons, no pressure sensors, no physical contact - just light. That idea might sound a little bit like ...