基于DS18B20的多功能多路温度监测器设计

his multifunctional multi-channel temperature detection alarm system based on DS18B20,AT89S52 is to inspect multi-channel temperature real-time and alarm. Utilized four DS18B20 sensors to measure four difficult temperatures and can add more. In order to achieve real time, we use a DS1302 clock chip, at the same time of temperature detecting, can afford the exactitude time of difficult temperature and put the data into memory. Due to the data is too large, we use two AT24C08 chip. That can exactitude memory the temperature historical change. When the temperature’s change over high-point, system will alarm. The display chip use 1602. Because of the clock chip and annunciator, our design also have another function-a number clock, for example, time show or timing. Those are all very useful.