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 ...

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 ...