Analog MQ-2 Smoke Sensor Interfacing with AVR ATmega32 microcontroller and LCD Display

Analog MQ-2 Smoke Sensor Interfacing with ATmega32 and LCD Display

7446

In this project, we will learn Analog MQ-2 Smoke Sensor Interfacing with AVR ATmega32 microcontroller and LCD Display. Here, we will interface an Analog MQ-2 Smoke Sensor with ATmega32 microcontroller and we will display the Analog MQ-2 Smoke Sensor value in the 16X2 Alphanumeric LCD.

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 16X2 Alphanumeric LCD.

Now, we will place burning incense stick near Analog MQ-2 Smoke Sensor and we will see the changes in the output of Analog MQ-2 Smoke Sensor in the 16X2 Alphanumeric LCD.

Softwares Required

Hardwares Required

Name	Quantity
AVR Trainer Board-100 with ATmega32	1pc
AVR USB Programmer	1pc
12V, 1A DC SMPS Adaptor	1pc
Analog MQ-2 General Combustible Gas Sensor Board	1pc
RG1602A 16X2 Alphanumeric LCD Green	1pc
1 to 1 Connector-Female to Female	6pc
10 to 10 FRC Female to Female Connector	2pc

Circuit Diagram

Video

Connection Guide

The step-by-step connection guide for Analog MQ-2 Smoke Sensor Interfacing with ATmega32 and LCD Display is as follows

Steps - 1 ( 0f 10 )

Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.
Steps - 2 ( 0f 10 )

Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.
Steps - 3 ( 0f 10 )

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 - 4 ( 0f 10 )

Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.
Steps - 5 ( 0f 10 )

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 - 6 ( 0f 10 )

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 10 )

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 10 )

Switch on the power with the help of Power Switch of AVR Trainer Board-100.
Steps - 9 ( 0f 10 )

Download Analog MQ-2 Smoke Sensor Interfacing with ATmega32 and LCD Display Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.
Steps - 10 ( 0f 10 )

Use a lighter as a LPG gas source near the Analog MQ-5 LPG Gas Sensor and see the change in output.

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

Steps - 1 ( 0f 10 )
Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

Steps - 2 ( 0f 10 )
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 10 )
Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

Steps - 4 ( 0f 10 )
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 10 )
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 - 6 ( 0f 10 )
Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

Steps - 7 ( 0f 10 )
Switch on the power with the help of Power Switch of AVR Trainer Board-100.

Steps - 8 ( 0f 10 )
Download Analog MQ-2 Smoke Sensor Interfacing with ATmega32 and LCD Display Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

Steps - 9 ( 0f 10 )
Use a lighter as a LPG gas source near the Analog MQ-5 LPG Gas Sensor and see the change in output.

Steps - 10 ( 0f 10 )