With the progress of the times and development, SCM has spread to our life, it used in various fields, and this technology mature gradually. This example will design products for electronic thermometers, we want to obtain temperature information by MCU.no doubt, we must use the temperature sensor. Temperature sensors will be converted to electricity or temperature information by MCU voltage output. Through the interface circuit chip control, LCD module in LCD display temperature, and it is used for the user's query. LCD with low power consumption, small volume, light quality, programmable driving etc. This example uses temperature sensor DS18B20 AT89S51SCM control, use sensors to collect temperature and HS1602 displayed in the LCD module, and it is can perform alarm temperature setting and upper temperature measurement。
Key words: MCU,Temperature sensor,Demonstration