TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

The flexible, electronic sensor is a small square patch, measuring less than 1 inch (2 centimeters) in height and width; it's made of conductive polymer material with embedded spiral-shape capacitors.

Engineered with a polarization filter that allows only light received from a specially designed reflector to be recognized by the detector, the Series OPDM 12 retro-reflective laser sensors eliminate ...