This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...

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 ...

ZARAGOZA, Spain & REDWOOD CITY, Calif.--(BUSINESS WIRE)--Cooking Hacks, the open hardware division of Libelium, a wireless sensor networks platform provider for Smart Cities solutions, has released a ...