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 ...

Fortunately there is a datasheet to help with implementing it, which is what [spezifisch] did. This raises the question of whether harvesting NDIR CO2 sensors like this is worth it to save a few ...

This is an IR beam breaking alarm ideal to use in entry or passages. It is based on the working of the popular IR sensor Module TSOP1738 which senses 38 kHz Infrared pulses from the IR LED of the ...

and rain — and radar — which produces coarser mapping data than other sensors — infrared sensors can detect extremely subtle differences in heat emitted by pedestrians, vehicles, and other ...