PC and Analog MQ-6 LPG & LNG Gas Sensor based Wireless LPG & LNG Gas Monitoring and Alarm System with AVR ATmega16 Microcontroller and 7 Segment Display using Series 2 Zig Bee

PC and Analog MQ-6 LPG & LNG Gas Sensor based Wireless LPG & LNG Gas Monitoring and Alarm System with ATmega16 and 7 Segment Display using Series 2 Zig Bee

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In this project, we will learn how to make a PC and Analog MQ-6 LPG & LNG Gas Sensor based Wireless LPG & LNG Gas Monitoring and Alarm System with AVR ATmega16 Microcontroller and 7 Segment Display using Series 2 Zig Bee. Here, we will display and monitor the concentration of LPG & LNG Gas wirelessly from a PC/Laptop using Zig Bee and 4 multiplexed Common Anode 7-Segment Displays. Also, we will compare the concentration of LPG & LNG Gas with a threshold value continuously and when the concentration of LPG & LNG Gas is greater than the threshold value, alert signal is sent to buzzer and to PC wirelessly.

Since, the output of the Analog MQ-6 LPG & LNG Gas Sensor is analog in nature and these analog signals cannot be processed directly by the ATmega16 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 ATmega16 microcontroller. After converting the analog signal to digital, the microcontroller will send the digital value of Analog MQ-6 LPG & LNG Gas Sensor to the Zig Bee through USART communication protocol. This Zig Bee transmits the digital value of Analog MQ-6 LPG & LNG Gas Sensor wirelessly to another Zig Bee connected with the PC/Laptop. At the PC/Laptop end, Zig Bee receives the digital value of Analog MQ-6 LPG & LNG Gas Sensor and transmits that to the PC/Laptop through a USB cable. In the PC, the RealTerm Software receives the digital value of Analog MQ-6 LPG & LNG Gas Sensor and displays it. Apart from PC/Laptop, microcontroller will display the Analog MQ-6 LPG & LNG Gas Sensor value in 4 multiplexed Common Anode 7-Segment Displays. Also, the ATmega16 microcontroller will compare the output of Analog MQ-6 LPG & LNG Gas Sensor value with a threshold value(here the threshold value is 700) continuously and when the Analog MQ-6 LPG & LNG Gas Sensor output value is greater than the threshold value, at that time the ATmega16 microcontroller will send alert signal to buzzer and to PC through Zig Bee. After getting the alert signal, buzzer starts beeping and PC displays the alert signal in the RealTerm Software.

Now, we will use any LPG or LNG Gas source near Analog MQ-6 LPG & LNG Gas Sensor and we will see the change in concentration of LPG & LNG Gas in PC, 7-Segment Displays and Buzzer.

Softwares Required

Hardwares Required

Name	Quantity
AVR Trainer Board-100 with ATmega16	1pc
AVR USB Programmer	1pc
Analog MQ-6 LPG & LNG Gas Sensor Board	1pc
Quad 7-Segment Display Board	1pc
XBee Series 2 (Configured Pair)	1pc
Zig Bee Base Board with USB Interface	1pc
12V, 1A DC SMPS Adaptor	2pc
USB AM-BM Cable	1pc
10 to 10 FRC Female to Female Connector	1pc
1 to 1 Connector-Female to Female	2pc