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Android Mobile and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring System with ATmega16 and 7 Segment Display using HC-05 Bluetooth

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In this project, we will learn about Android Mobile and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring System with AVR ATmega16 Microcontroller and 7 Segment Display using HC-05 Bluetooth. Here, we will display and monitor the concentration of Hydrogen Gas wirelessly from an Android Mobile using Bluetooth and 4 multiplexed Common Anode 7-Segment Displays.

Since, the output of the Analog MQ-8 Hydrogen 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-8 Hydrogen Gas Sensor to the HC-05 bluetooth through USART communication protocol. This HC-05 bluetooth transmits the digital value of Analog MQ-8 Hydrogen Gas Sensor wirelesslyto the bluetooth of the Android Mobile. The bluetooth of the Android Mobile receives the digital value of Analog MQ-8 Hydrogen Gas Sensor through an Android App called Bluetooth Terminal and displays it. Apart from Andoid Mobile, microcontroller will display the Analog MQ-8 Hydrogen Gas Sensor value in 4 multiplexed Common Anode 7-Segment Displays. In this way, the concentration of Hydrogen Gas is monitored from the Andoid Mobile wirelessly and from 4 multiplexed Common Anode 7-Segment Displays.

Now, we will use some source of Hydrogen Gas near Analog MQ-8 Hydrogen Gas Sensor and we will see the change in concentration of Hydrogen Gas in Andoid Mobile and 7-Segment Displays.

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega16 1pc
AVR USB Programmer 1pc
Analog MQ-8 Hydrogen Gas Sensor Board 1pc
Quad 7-Segment Display Board 1pc
HC-05 Bluetooth Board 1pc
12V, 1A DC SMPS Adaptor 1pc
10 to 10 FRC Female to Female Connector 2pc
1 to 1 Connector-Female to Female 11pc

Circuit Diagram

Video

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Android Mobile and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring System with ATmega16 and 7 Segment Display using HC-05 Bluetooth
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