op amp Amplifying signal from CO2 Sensor

Posted on Feb 7, 2014

Amplify a MG811 CO2 sensor to a range readable by an ATMEGA2560 (0-5v). I have other analog sensors, so do not want to change ref voltage on Atmega. I have found a module that scales the signal and want to replicate the circuit from the documentation, but want to make sure that the schematic I have is correct. It seems from the module documentation that the sensor operates

op amp Amplifying signal from CO2 Sensor
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in a range of 100-600mV (though this is different from the datasheet which shows a range between about 260-350mv). The module uses a LMC662 dual op amp.

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