TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

You can make a perfectly good water detector with things you probably already have around the house. My point isn’t that you should (or shouldn’t) construct a homemade water sensor.

Sensor invented that uses radio waves to detect subtle changes in pressure Date: October 10, 2014 Source: Stanford School of Engineering Summary: A new sensor has been developed by engineers that ...