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众所周知,用被动式热释红外传感器可以制作各种各样的防盗报警器和自动控制开关。这里,向大家推荐一种与众不同的热释红外线防盗报警器。它用廉价的4运放Lm324做探头,完成对热释红外线信号的放大、比较和输出,用51系列单片机AT89C2051做报警器的主控部分,两者之间只用一根双线相连接。这条线路既要给红外传感器供电,又传送探头向主机发回的各种报警信号。
As we all know, with a passive pyroelectric infrared sensor can produce a wide range of anti-theft alarm and automatic control switch. Here, we recommend a distinctive pyroelectric infrared burglar alarm. It uses a cheap 4 op amp Lm324 probe to complete the pyroelectric infrared signal amplification, comparison and output, with the 51 series microcontroller AT89C2051 do the main part of the alarm, the connection between the two with only a two-wire. This line should not only supply power to the infrared sensor but also transmit various alarm signals sent by the probe to the host.