说明：  一个简单的被动式红外线防盗报警器。该报警器由红外线发射、接收、蜂鸣器和LED指示灯组成。正常情况下，绿色的LED常烁，表示监控区域正常。一旦监控区域有人闯入，绿色LED熄灭，红色的LED快速闪烁，同时蜂鸣器立即报警。
(a simple, passive infra-red anti-theft alarm. The alarm from the infrared transmitter and receiver, buzzer and LED indicator components. Under normal circumstances, the green LED Chang Shuo, regional monitoring normal. Once control was broken into regional and green LED is off, the red blinking LED, buzzer reported to the police.)