DIY anti-theft circuit with infrared version 2 Here is the circuit with infrared anti-theft version 2 I have just completed You can put it at the door in your home or anywhere. circuit broadcast receiver circuit Obtained circuit enclosed in a small box circuit design more compact development and use of two infrared light to increase its ability to scan inside it has built a siren This should be in your signature (Moderator) see more at: http://www.diyvn.net/