Carbon Monoxide CO Sensor Module (DC 5V MQ-9)
Detect Flammable Gas Levels Adjustable pot for sensitivity Analog output value rises with the concentration of detected gases.
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Carbon Monoxide CO Sensor Module (DC 5V MQ-9)
4 Pins: VCC connect to 5v on your micro-controller GND connect to GND on your micro-controller A0 connect to an Analog input pin on your micro-controller D0 connect to a digital input on your micro-controller