Ref Silicon Chip February 2008
You can use it to activate security systems, decorative lighting, fountain pumps or commercial advertising etc. Just about anything that can be plugged into a standard power point can be triggered by people moving in the vicinity of the passive infrared detector. The system uses a standard PIR to safely turn on 240VAC mains device(s) for an adjustable pre-set period. It's compact, easy to build, and will cost you much less than commercial PIR-triggered switches with similar features. Kit supplied with case, screen printed PCB, and all electronic components.