3、tractWith the rapid development of modern information technology and the gradual transformation of traditional industries to achieve, automatic temperature detection and display systems are widely used in many fields. People in the temperature measuremen
4、t accuracy, convenient, rapid, and has a growing demand. This article was designed and produced a simple thermometer. This design uses a microcontroller STC89C52 and temperature sensor DS18B20 automatic temperature control system formed can be arbitrari
5、ly set the temperature according to the actual value and for automatic control. In this design using the STC89C52 microcontroller as the main control device, DS18B20 as an LCD digital temperature sensor tube through the serial transmission of data, to ac
6、hieve temperature display. DS18B20 measured by direct reading temperature values, data conversion, to set the temperature to set the alarm on the lower temperature. And the temperature reaching the alarm, the system will automatically alarm. This design
7、 is from the temperature measurement circuit, main control circuit, alarm circuit, and several other aspects of the note. The device can transmit digital signals directly to the microcontroller, easy to handle and control MCU. In addition, the thermomete
8、r temperature measurement device can be used directly to measure temperature. The major advantages of this design is reflected in operable structural basis is simple, lots of expansionspace.Keywords:STC89C52;DS18B20;thermo