With the development of electronic technology，the availability of display functions becomes a standard of buying electronic production, time and temperature display as the basic display technology in the electronic design appears to be more important.
Taking the single-chip AT89S51 as a controller, the designed circuit of this system mainly includes four parts which are the digital tube displaying circuit, the functional controlling circuit, the sensor circuit and the keyboard circuit. It can measure the current environment temperature and display the current time. To absorb the ideas of hardware are transforming software, most of the functions achieved through software, not only to guarantee the circuit simplistic, but also to improve the stability of the system.
This system chooses the DS18B20 to be the temperature sensor. It can also make the net simple and reliable with its special 1-wire interface. In DS18B20, the temperature signals are converted into digital signals directly, and interface with a MCU, so that the signal conditioning circuit could be omitted. This instrument features simple circuit, reliable functions, and high2efficiency measurement. It covers the shortages of the traditional temperature measurement. Thus, I believe that the system has a good application prospect in these circumstances such as environmental mastery.
Keywords: Single Chip, DS18B20,Temperature Sensor ,Measure-Temperature
