The sound and light alarm system of temperature and smoke detecting based on MCU

摘要

This paper designs the alarm system which is based on the AT89S52 MCU (Micro Control Unit). The system uses a temperature sensor and a temperature sensor to detect the values of temperature and the smoke concentration in the environment, and then the four digital tubes display the values of the temperature and smoke concentration. The system will alarm with sound and light signal when the temperature or smoke concentration exceeds the preset value. The alarm system is practical because it has some advantages such as simple structure, stable performance, ease of use, high reliability and so on.