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时钟显示数字温度测试仪可用于室内环境温度测量,集日历、测温、报警于一体。加上语音芯片可报出时间和温度,温度超出规定范围时可通过蜂鸣器报警。一、电路结构与特点电路如图1所示。本作品主要由AT89S51单片机,时钟芯片DS1302,数字温度传感器DS18B20,液晶显示器FM1602C,蜂鸣器和三个发光二极管组成。系统通过单片机AT89S51的P2.0,P2.1,P2.2,P2.3和四个复位开关来控制数字温度传感器DS18B20;通
Clock display Digital temperature tester can be used for indoor temperature measurement, set calendar, temperature, alarm in one. With the voice chip can be reported time and temperature, the temperature can be buzzer alarm when the specified range is exceeded. First, the circuit structure and characteristics of the circuit shown in Figure 1. This work mainly consists of AT89S51 microcontroller, DS1302 clock chip, digital temperature sensor DS18B20, liquid crystal display FM1602C, buzzer and three light-emitting diodes. The system controls the digital temperature sensor DS18B20 through P2.0, P2.1, P2.2, P2.3 and four reset switches of AT89S51 of the one-chip computer; Pass