本文介绍的报警器是利用普通电话线进行报警信号呼叫的简单电路来实现的,功能不是很多,但比较实用。该电路可与目前市场上一些普通的,如声、光、烟、雾、气、超声等探测器相配接,实现防盗、防火等报警功能。这里以一个红外防盗报警器为例进行说明。将红外探测器与电路配接... This article describes the alarm is the use of ordinary telephone line alarm signal call to achieve a simple circuit, the function is not a lot, but more practical. The circuit with some common on the market today, such as sound, light, smoke, fog, gas, ultrasound and other detectors match, to achieve security, fire and other alarm functions. Here an infrared burglar alarm as an example to illustrate. The infrared detector and circuit matching ...