This paper mainly USES AT89C51 microcontroller as the core, DS18B20 temperature sensor, MAX7219 display drives design temperature detection and alarm system.System has a temperature detection, temperature display, alarm, also can undertake multi-point measurement, etc.Through two DS18B20 to two road temperature measurement, using 8-bit common cathode digital tube display temperature, buzzer to implement when the temperature exceeds a certain limit or lower limit alarm and through the keys to changes of temperature, and the operation simple and easy to implement.

报警系统.c

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