It is important to know whether the gas coming out is hazardous or not. So I built this small handy or wearable sensor to know about hazardous gases. It gives LED indication on detection of hazardous gas coming.
Connect battery positive and negative terminal to Gemma BAT+ and BAT- respectively.
Connecting MQ9 Sensor- Connect MQ9 GND to GND
- Connect MQ9 5V to %v step up converter.
- Connect MQ9 Ground to Gemma D2 Via 100 ohm resistor.
- Connect MQ9 GND to MQ9 D0 via 100 ohm resistor.
- Connect LED GND to GND via 100 ohm resistor.
- Connect LED Vin to Gemma D0.
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I am an Electronics Hobbyist pursuing my BE in Electronics and communication
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