Patent ID: 7321120

Claim:
A motion detector comprising: a housing having a front side and a back side; a plurality of conductors disposed on said back side configured to electrically connect to a wiring module installed within an electrical box; a first circuit board and a second circuit board retained within said housing, said second circuit board piggybacked on said first circuit board; a lens disposed on said front side configured to focus IR radiation; an IR sensor mounted within said housing configured to receive IR radiation from said lens and generate a sensor signal in response to motion across the field-of-view of said lens; a controller responsive to said sensor signal so as to generate a switch signal; a relay responsive to said switch signal so as to switch an electrical power source in communications with a power one of said conductors via said wiring module to an electrical power load in communication with a load one of said conductors via said wiring module; and a relay driver configured to actuate said relay in response to said switch signal, wherein said IR sensor and said controller are mounted on said first circuit board and said relay and said relay driver are mounted on said second circuit board.