Adafruit’s Raspberry Pi blog in the US is becoming an interesting design projects and shows how the tiny computer which came out of Cambridge is being used by the US maker community. This camera ...

The PIR motion sensor is a key component in this project. It detects infrared radiation from moving objects, such as humans or animals, and sends a signal to the Raspberry Pi.

While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.