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Smoke Detector using Gas Sensor - Arduino Project Hub
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![Smoke Detector using Arduino and Smoke Sensor | IoTDunia](https://i2.wp.com/iotdunia.com/wp-content/uploads/2017/03/circuit-diagram.png)
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![DIY Arduino Smoke Detector Shield using MQ2 Gas Sensor](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram_mic/MQ2-Arduino-smoke-detector-circuit-diagram.gif)
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![How MQ2 Gas Sensor works with Arduino. – MYTECTUTOR](https://i2.wp.com/mytectutor.com/wp-content/uploads/2019/11/schematic.png)
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