Let me introduce another simple microcontroller-based do-it-yourself circuit that detects motion and excites a light source in a flash. The “snooper” here is an ordinary passive infrared (PIR) motion ...

Recently, I exhausted my stock of common passive infrared (PIR) motion sensor modules and was looking for a new one to play with. I searched the web for a small type with self-contained electronics.

This light is a rather dim LED module whose purpose is to give you a very small bit of illumination when using the restroom at night. If you rely on it instead of using the overhead lighting in the ...