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 ...
Light sensors often use an infrared LED as a light source. Infrared LEDs have a greater intensity than LEDs that emit visible light. And when infrared photodiodes are used the sensors are relatively ...
An image from a corrugated quantum well infrared photodetector (C-QWIP) shows traffic flowing along a highway near Kings Island theme park in Mason, Ohio. Note the white "hot" spots on the tires and ...
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