About the article

Infra-red burglar alarm

Based on a Labs project | October 2011 | Find it here
Infra-red burglar alarm
The alarm circuit uses infra-red light beams to bridge distances between 3 m and 5 m (10 ft to 16 ft), but if the transmit diode is given a reflector, larger distances are possible. When the beam is interrupted, a buzzer sounds.
Downloading of this magazine article is reserved for registered users only.
Login | Register now!
Loading comments...