This paper mainly introduces a temperature measurement system based on AT89C51, describes in detail using digital temperature sensor DS18B20 temperature measurement and control system in the development process, the data acquisition process of digital temperature sensor DS18B20 and ULN2003A process of stepper motor driver made a detailed introduction. The system can easily realize real-time acquisition and display of temperature, driving a stepper motor rotation, and can be arbitrarily set upper and lower alarm temperature according to need.

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