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Smoke Monitoring and Alarm System with ATmega32 and LCD Display using Analog MQ-2 Smoke Sensor

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In this project, we will learn How to make a Smoke Monitoring and Alarm System with AVR ATmega32 Microcontroller and LCD Display using Analog MQ-2 Smoke Sensor. Here, we will display and monitor the concentration of smoke using Analog MQ-2 Smoke Sensor in 16X2 Alphanumeric LCD Display. Also, we will compare the concentration of smoke with a threshold value continuously and when the concentration of smoke is greater than the threshold value, the buzzer will start beeping.

Since, the output of the Analog MQ-2 Smoke 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-2 Smoke Sensor in the Alphanumeric LCD Display. Also, the ATmega32 microcontroller will compare the output of Analog MQ-2 Smoke Sensor value with a threshold value(here the threshold value is 700) continuously and when the Analog MQ-2 Smoke Sensor output value is greater than the threshold value, at that time the ATmega32 microcontroller will send signal to buzzer and the buzzer starts beeping.

Now, we will place burning incense stick near Analog MQ-2 Smoke Sensor and we will see the change in concentration of smoke in the Alphanumeric LCD Display and Buzzer.

Softwares Required

Hardwares Required

Name / Unit Price Quantity Total Price
AVR Trainer Board-100 with ATmega32
Rs. 730.00
1pc
Rs.730.00
AVR USB Programmer
Rs. 350.00
1pc
Rs.350.00
Analog MQ-2 General Combustible Gas Sensor Board
Rs. 200.00
1pc
Rs.200.00
RG1602A 16X2 Alphanumeric LCD Green
Rs. 150.00
1pc
Rs.150.00
12V, 1A DC SMPS Adaptor
Rs. 130.00
1pc
Rs.130.00
10 to 10 FRC Female to Female Connector
Rs. 15.00
2pc
Rs.30.00
1 to 1 Connector-Female to Female
Rs. 4.00
6pc
Rs.24.00
TOTAL Rs.1614.00

Circuit Diagram

Circuit_Diagram_of_Smoke_Monitoring_and_Alarm_System_with_AVR_ATmega32_Microcontroller_and_LCD_Display_using_Analog_MQ-2_Smoke_Sensor.png

Video

Connection Guide

The step-by-step connection guide for Smoke Monitoring and Alarm System with ATmega32 and LCD Display using Analog MQ-2 Smoke Sensor is as follows:

  • Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.

    Steps - 1 ( 0f 11 )

  • Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

    Steps - 2 ( 0f 11 )

  • Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.

    Steps - 3 ( 0f 11 )

  • Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

    Steps - 4 ( 0f 11 )

  • Connect the VCC, GND & O/P pins of Analog MQ-2 Smoke Sensor header to VCC, GND and PA0 pins of PortA header of AVR Trainer Board-100 respectively with 1 to 1 Connectors.

    Steps - 5 ( 0f 11 )

  • Connect the VCC, I/P & GND pins of Buzzer header with 5V header, PC0 pin of PortC header & GND header respectively in AVR Trainer Board-100 with a 1 to 1 Connectors.

    Steps - 6 ( 0f 11 )

  • Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.

    Steps - 7 ( 0f 11 )

  • Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

    Steps - 8 ( 0f 11 )

  • Switch on the power with the help of Power Switch of AVR Trainer Board-100.

    Steps - 9 ( 0f 11 )

  • Download Smoke Monitoring and Alarm System with ATmega32 and LCD Display using Analog MQ-2 Sensor Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

    Steps - 10 ( 0f 11 )

  • Place burning incense stick near the Analog MQ-2 Smoke Sensor and see the output.

    Steps - 11 ( 0f 11 )

  • Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.

    Steps - 1 ( 0f 11 )

  • Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

    Steps - 2 ( 0f 11 )

  • Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.

    Steps - 3 ( 0f 11 )

  • Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

    Steps - 4 ( 0f 11 )

  • Connect the VCC, GND & O/P pins of Analog MQ-2 Smoke Sensor header to VCC, GND and PA0 pins of PortA header of AVR Trainer Board-100 respectively with 1 to 1 Connectors.

    Steps - 5 ( 0f 11 )

  • Connect the VCC, I/P & GND pins of Buzzer header with 5V header, PC0 pin of PortC header & GND header respectively in AVR Trainer Board-100 with a 1 to 1 Connectors.

    Steps - 6 ( 0f 11 )

  • Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.

    Steps - 7 ( 0f 11 )

  • Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

    Steps - 8 ( 0f 11 )

  • Switch on the power with the help of Power Switch of AVR Trainer Board-100.

    Steps - 9 ( 0f 11 )

  • Download Smoke Monitoring and Alarm System with ATmega32 and LCD Display using Analog MQ-2 Sensor Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

    Steps - 10 ( 0f 11 )

  • Place burning incense stick near the Analog MQ-2 Smoke Sensor and see the output.

    Steps - 11 ( 0f 11 )

Downloads

Smoke Monitoring and Alarm System with ATmega32 and LCD Display using Analog MQ-2 Smoke Sensor
  • 4 downloads 274 Kb

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