By Bert Henscheid, November 10, 2009
The author of this Idea for Design modifies a Genie garage door Safe-T-Beam system to create this circuit. The IR transmitter must be replaced but the IR receiver can be used as is.
By Bert Henscheid, August 09, 2004
Figure 1 shows a way to control a light (or other 120-V ac appliance) with a passive-infrared (PIR) alarm sensor. The original concept was to turn a closet or shop light on whenever someone went into...