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.

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 ...

NASCAR drivers looking for an advantage for the Checker Auto Parts 500 will be testing at Phoenix International Raceway beginning Oct. 18. PIR officials said the drivers scheduled to test include some ...