A quick search found several versions of infrared line tracker sensor modules that met or exceeded my demands, but I picked the cheap YL-70 4-channel line tracker module! The YL-70 line tracker sensor ...

The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value). This digital output (wet ...

Krejci’s design, while affordable, offers an 8×8 resolution, which is the maximum output of the AMG8833 infrared sensor array. DIY Arduino thermal camera Watch this video on YouTube .