利用89C2051 单片机及单线制DS18B20 数字温度传感器，实现了一种智能恒温控制与显示电路。恒温控制软 件设计部分基于电路设计工具OrCAD/Capture，硬件部分包括单片机主控模块、LED灯显示电路和电源模块。在低温环境 时，能启动电加热器，并将温度控制在31±3℃范围内，同时用LED数码管实时显示在前面板上。

An intelligent constant temperature control and display circuit is realized by using 89C2051 single chip microcomputer and DS18B20 digital temperature sensor. The software design of constant temperature controller is based on OrCAD/Capture. The hardware include the 89C2051, LED display circuit and power supply module. In the low temperature environment, the controller can start the electric heater, controlling the temperature in the range of 28 to 34 degrees Celsius, and displays the result on the front panel in real time.