BRICK WALLS is what we have run into for this project. Filter/Amplifier part coming from China did not get ordered early enough, so it is not here. Therefore the CO2 sensor will not be used until it comes in. Seems that the CO2 sensor will not put out enough voltage to run a ventillation fan (needs 12V DC) without amplification. Original CO2 voltage output starts at .2 VDC and decreases when CO2 levels increase. This prompted the need for the additional component for the sensor unit.
Due to the above difficulties, the team has opted to try measuring VOCs instead of CO2. Sharin thinks adapting the VOC sensor to have the needed voltage output to power the ventillation fan is possible considering the addition of the Arduino and Mosfet circuitry.
Currently we are testing the VOC sensor in a closed plastic container with the Grey Wolf sensor to compare readings. Grey Wolf measures in parts per billion (ppb) and the TGS 2602 VOC sensor measures in voltage and results will have to be converted into a parts per million (ppm) or parts per billion (ppb) format. We will see tomorrow if there is a lag between sensors, or something is hinky...
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