[ladyada] has a freshly-published and amazingly thorough tutorial on passive infrared (PIR) motion sensors. Most often seen in security floodlights and automatic doors, in creative hands these sensors ...

Working Voltage:DC 2.7V-12V;Max Static current:1mA;delay time: 2S;Blockade time: 2S;Sensor angle:100 Degree;Sensor distance: 3-5m. Repeatable Trigger Mode:When people enters the sensing range, the ...

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.

Smart home sensors and cameras can also tackle tiny threats, providing info and options for handling bugs all on your own.