"基于AT89S52单片机的一氧化碳报警器设计与应用"

s living standards, gas has become the fuel for most families. The hazards of gas leaks and improper use of natural gas have brought great risks to people's lives and property. Preventing carbon monoxide poisoning and explosions has become an urgent need for people. In response to this, we have designed a carbon monoxide alarm. Given the high integration of the AT89S52 single-chip microcontroller, we have designed a carbon monoxide alarm based on the AT89S52. This alarm monitors carbon monoxide (CO) in real time and sounds an alarm when the concentration of carbon monoxide exceeds the allowable limit. To improve the system's sensitivity and accuracy, we have adopted a highly stable sensor, the MQ-7 sensor. This sensor is placed in the test environment to convert the concentration of the gas to be tested into an analog voltage, which is then converted into a digital signal by the ADC0809 analog-to-digital converter and processed by the AT89S52 single-chip microcontroller. This design achieves the organic combination of the ADC0809 and AT89S52 microcontrollers. In addition, using the AT24C02 memory and the LCD1602 liquid crystal display, the detection data is stored and displayed. Keywords: carbon monoxide; microcontroller; alarm; sensor; analog-to-digital converter; memory; liquid crystal display.