The sensor is connected to one of the analog inputs of an Arduino, which also runs a 128×64 pixel LCD display — inspired by this air quality meter — to show the current smokiness both ...

This seems to just egg people on to reproduce it using other technologies than the optical pickup system the ... building one using linear Hall effect sensors and magnets as the detection ...

The sensor in the 4-SMD gullwing standard housing measures ... UK-based company OMC has launched an H19 fibre-optic shield, ...