Starting with everyday life, this paper simulates a fire intelligent alarm suitable for public places. The paper takes the smoke sensor, microcontroller technology and temperature sensor as the core, and simply simulates a preferred fire alarm. This alarm can constantly detect the concentration of smoke nearby smoke concentration, easy to burn gas density, temperature, etc. to carry out some timely measures, once greater than a set value, it emits sound and light. The advantages of this alarm are simple structure, easy to get used, cheap, modern, it has a certain application value.
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