Alcohol Monitoring System with ATmega32 and 7-Segment Display using Analog MQ-3 Alcohol Sensor
In this project, we will learn How to make an Alcohol Monitoring System with AVR ATmega32 Microcontroller and 7-Segment Display using Analog MQ-3 Alcohol Sensor. Here, we will display and monitor the concentration of alcohol using Analog MQ-3 Alcohol Sensor value in 4 multiplexed Common Anode 7-Segment Displays.
Since, the output of the Analog MQ-3 Alcohol Sensor is analog in nature and these analog signals cannot be processed directly by the ATmega32 microcontroller. So, first this signal needs to be converted to digital value to be processed by the microcontroller. The conversion can be done with the help of ADC of the AVR ATmega32 microcontroller. After converting the analog signal to digital, the microcontroller will display the digital value of Analog MQ-3 Alcohol Sensor in the 4 multiplexed Common Anode 7-Segment Displays.
Now, we will place cotton dipped in Alcohol/Spirit near Analog MQ-3 Alcohol Sensor and we will see the change in concentration of alcohol in the 7-Segment Displays.