Breakout Board for MQ-7 (Carbon Monoxide) Gas Sensor Module
This is a breakout board for the MQ-7 Gas sensor. An MQ-7 sensor needs to be soldered on this breakout board. You can start recording data by plugging in three cables into any Arduino microcontroller. This unit has four pinouts and an adjustable potentiometer on the backside for adjusting sensitivity. The unit requires 5v DC to operate and can deliver information via its analogue and digital pins.
Resources:
http://playground.arduino.cc/Main/MQGasSensors
Open Arduino IDE > Examples > Basic > AnalogReadSerial
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