MQ7 Breakout

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does knows how wire breakout (http://dx.com/p/mq-7-high-sensitivity-co-carbon-monoxide-detector-sensor-black-166570) ?
i know mq7 needs have burning time, how do ? !

this basic guide mq gas sensors, http://playground.arduino.cc/main/mqgassensors

connect sensor as:

  • vcc 5v. 5v output pin of arduino might not supply enough current, might need power supply of 5v.

  • gnd gnd

  • aout analog input of arduino

  • dout, can connect digital pin, don't need it.



the sensor board has comparator , digital output. kind of nonsense, arduino can detect analog level.

the heater mq-7 needs 5v , 1.4v. can create 1.4v pwm signal , mosfet switch heater.

if want full description, @ websites of sparkfun , adafruit.
if want cheap, search on ebay.


Arduino Forum > Using Arduino > Sensors > MQ7 Breakout


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