Design of an Alcohol Detection System Based on the 51 Microcontroller
Abstract: This article designs a portable alcohol tester centered around the STC89C51 microcontroller, utilizing the MQ-3 semiconductor alcohol sensor in conjunction with the ADC0832 analog-to-digital conversion chip to achieve real-time alcohol concentration measurement and threshold alarm functionality. The system displays the current concentration and alarm threshold on an LCD1602. When the concentration exceeds the threshold, … Read more