专用于模拟传感器的LED指示型三态电压报警器

LED indicator three state voltage alarm for analog sensor

针对目前报警器或检测器只对两种状态(或现象)"0"或"1"提供警示,这对于数字型传感器合适;但对于某些像温度、水位、气流、电压等模拟型传感器来说,其输出电压值是模拟信号,对它的警示或指示若只有"0"或"1"两种状态已显不足。提供一种简单电路,采用四个三极管及外围元件组成一个检测电路,这些三极管互相触发或箝位,将不同电压段的模拟传感器输出信号按照"欠压、正常、过压"用三个发光二极管分别警示,完美解决了我们日常生活中的另一种"报警"现象,即"三状态"报警。

At present, only two kinds of alarm detector or state（or phenomenon）＂ 0＂ or＂ 1＂ to provide a warning, the digital sensor suitable for some; but like temperature, water level, flow, voltage analog sensor, the output voltage value of the analog signal is a warning or indicator light＂ on it 0＂ or＂ 1＂ two states have been insufficient.Provide a simple circuit with four transistors and peripheral components of a detection circuit, the transistor trigger each other or clamp, the analog output signal of the sensor section according to the different voltage under voltage, overvoltage, normal＂ warning respectively with three light-emitting diodes, perfect solution to another kind of＂ alarm ＂phenomenon in our daily life, namely＂ three state＂ alarm.