Interesting hack where the author wires in a motion sensor into a powerline.
http://www.instructables.com/id/Use-a-Motion-Sensor-to-Automate-Your-Haunted-House/
Interesting hack where the author wires in a motion sensor into a powerline.
http://www.instructables.com/id/Use-a-Motion-Sensor-to-Automate-Your-Haunted-House/