PIR sensor

Image source.

PIR stands for Passive InfraRed and this motion detector is what I will be using in my project.

It scans and searches for passive IR reflections (such as a human). Basically works like an on / off switch ( I/0 ).

What I will do is to set this detector with my Arduino set, and try it out with the code from Arduino playground.

DFRduino Duemilanove 328 ; with USB connection ;

100% Arduino compatible.