MQ-7 Sensor


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Thread: MQ-7 Sensor

  1. #1
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    Default MQ-7 Sensor

    Looking for a Code Example to use with a MQ-7 (Carbon Monoxide Sensor) to control the heater. Vh should be at 1.5V + or - 0.1v low voltage when detecting CO and at 5v + or - 0.1v when not detecting.
    I am using PBP v3.1 and using both a analog input to read the level of CO and a Dig. output for a warning indicator. Thank you for any help.

  2. #2
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    Default Re: MQ-7 Sensor

    Chipmaker, I am using a MQ-8 HYDROGEN SENSOR for my battery containment chamber and it is very similar. The only thing I would make sure of is to filter the analog readings over a period of time so as to eliminate any noise problems. I use mine to control the PWM and hence forth the speed of the exhaust blower and a alarm limit. It's been working flawlessly for about 5 years.
    Dave Purola,
    N8NTA
    EN82fn

  3. #3
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    Default Re: MQ-7 Sensor

    Dave, Thank you for that info. I did not think about filtering the analog reading. That may be the answer to my problem with the MQ-7. A noise problem. Me not thinking right so I
    I am thinking left.

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    Default Re: MQ-7 Sensor

    Dave

    Thank you with that filter idea. Problem was noise. IT'S WORKING

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