MQ9 Sensor and Relay-Based Automatic Exhaust Fan Control using Arduino_Anurag_Pachauri circuit diagram

MQ9 Sensor and Relay-Based Automatic Exhaust Fan Control using Arduino_Anurag_Pachauri

By Anurag Pachauri

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Components used: arduino, arduinouno, mq-9, npntransistor, led, resistor

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