The Design of A Simple Digital Thermometer

This article introduces the basie characteristics of DS18B20. Becase DS18B20 has a series of characteristics such as digital output,1-wire interface and low cost,it is applied to the environment detection system as temperature measuring probe. The system is composed of AT89C2051 and kinds of environment sensors. This article also gives the corresponding hardware interface circuit, software flow diagram and the primary code. According to the characteristic of DS18B20 that DS18B20 is strict to the time slots,this article provides an actually introduction.