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 ...

How can you detect the presence of a flame without a fancy commercial device? In this post I will describe how to build cheap flame sensors at home with a couple of methods. Second Method: Secondly, ...

[Brian] started out with a clear and concise goal, “allow a regular human to associate an audible tone with a temperature from an infrared contactless thermometer.” With his latest project, the ESPeri ...