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Alcohol Monitoring System with ATmega32 and 7-Segment Display using Analog MQ-3 Alcohol Sensor

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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.

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega32 1pc
AVR USB Programmer 1pc
Analog MQ-3 Alcohol Sensor Board 1pc
Quad 7-Segment Display Board 1pc
12V, 1A DC SMPS Adaptor 1pc
10 to 10 FRC Female to Female Connector 2pc
1 to 1 Connector-Female to Female 7pc

Circuit Diagram

Video

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Alcohol Monitoring System with ATmega32 and 7-Segment Display using Analog MQ-3 Alcohol Sensor
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