Occupancy detector for Arduswitch

It is designed to hold two sharp 2Y0A02 infrared distance rangers. This will let you know if a person is coming into or out of a room. Works well but it can be easily tricked.
See it work in this video http://youtu.be/LK1QuKDAAWI?list=UUb7wcHtIuJ33AhQX-S9aLzg
Find out more at http://www.lights-off.com.
For youtube videos on the project visit http://www.youtube.com/playlist?list=PLuFG8ny2IoqH9LiVepVwCGVSHnZ31UTJ7 .
Need a CAD model of the SHARP 2Y0A02, check out https://grabcad.com/library/sharp-2y0a02-2.