fire alarm

This design mainly uses the MCS-51 series microcontroller STC89C52 as the control core. It comes with an 8K FLASH program memory and its core processing unit is 8 bits. Data processing mainly involves collecting temperature data from the digital temperature sensor 18B20 and AD collecting the MQ-2 smoke sensor, making logical judgments, and outputting them to the digital tube display and activating the buzzer according to the specific conditions of the data. The design of the entire microcontroller application system is divided into two parts: hardware circuit design and software programming design; the hardware circuit design includes temperature acquisition circuit, MQ-2 smoke sensor circuit, microcontroller control circuit, circuit display circuit and alarm and control circuit. The software design part includes the system main program, temperature acquisition subprogram, digital tube display subprogram and output driver subprogram, all of which are implemented using 51 series C language programming.