Garage Door Opener Parts Form IR Intrusion Detector

摘要

While creating an infrared beamrnintrusion detector system, the need for a beam-focusing method became evident. Parts from a modified Genie garage door Safe-T-Beam system, purchased at the local home improvement store, proved to be perfectly suited to the application. The main reason for choosing the Genie unit is that the IR transmitter and receiver housings each contain a plastic lens inside a short plastic tube molded into the housing. The tube and lens help to shield and focus the beam, simplifying installation of the intrusion detector.