Introduction: Gas Leakage and Human Detection for Chemical Industries
This project is for ensure safety of workers in chemical industries . This project is based on PIR and MQ2 gas sensor. its give us an alert on gas spreading and human presence in that gas leaked building . So lets get started ....
Supplies
ARDUINO UNO
MQ2 GAS SENSOR
PIR SENSOR
LEDS 6
BUZZER
BREADBOARD OPTIONAL)
Step 1: CONNECTIONS
1) MQ2 GAS SENSOR SIGNAL PIN ==== ARDUINO ANALOG PIN A5
2) PIR SENSOR SIGNAL PIN ==== ARDUINO DIGITAL D7
3) BUZZER +VE ==== ARDUINO DIGITAL D8
4) LED4 ==== ARDUINO DIGITAL D9
5) LED3 ==== ARDUINO DIGITAL D10
6) LED2 ==== ARDUINO DIGITAL D11
7) LED1 ==== ARDUINO DIGITAL D12
8) ALL PINS VCC AND GROUND TO +5V AND GROUND
Step 2: The Power Supply
the power to PIR LEDS BUZZER AND GAS SENSOR is taken from arduino. For making it easier we use a breadboard. The +5v and ground of arduino is connected to the + & - rail of breadboard. Then the Vcc(5V) for PIR and gas sensor is taken from +ve rail of breadboard. The cathode of all led ,-ve of buzzer and ground(GND) of all PIR and gas sensor is connected to -ve rail of breadboard.
Step 3: The PIR
The PIR is a 4 terminal module consist of 5v, GND,digital output(Do) and analog output(Ao).We only connect (Do)
Or (Ao) in this project. I use (Do) for taking output. So (Do) is connected to digitalpin 7 (D7) of arduino.
Step 4: The MQ2 GAS SENSOR
Step 5: CODE
THIS IS THE ARDUINO CODE :