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Gas Sensor Board for CH4 — Parallax Forums

Gas Sensor Board for CH4

matrixkid44matrixkid44 Posts: 4
edited 2014-02-14 21:52 in Accessories
I am trying to figure out what is the voltage lvl for a logic 1 and logic zero and which input pin will give us the reading signal. HSW or ALR. This for the parallax methane sensor. Thank you

Comments

  • kwinnkwinn Posts: 8,697
    edited 2014-02-14 21:52
    ALR is the alarm output pin, and HSW controls the heater. The heater must be on to sense gas, and the reading may take some time to stabilize after the heater is turned on. All this information is available in the gas sensor board guide.
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