The design of multi-zone wireless burglar alarm system

Based on the microcontroller AT89C51, an eight regional wireless burglar alarm system is designed in this paper. This burglar alarm is composed of an infrared sensor chip BISS0001 as a detector, the microcontroller AT89C51 as controller and LX2262/LX2272 as encoder/decoder. Via an external remote controller, it can achieve eight monitored region arming and disarming, and burglar alarming. The design has focused on remote alarming with the distance of 25m, which also can be even enlarged by enhancing the power transmitting circuit as you needed. When using other sensors as detectors, it can be worked as anti-theft alarm, fire alarm, gas-leak alarm and multi-functional alarm system, which will be very useful to Smart Home System.