Hi,
I am doing a project with arduino and MG811 sensors.I did the connections of the co2 sensor as shown in the attachment.But the sensor is not showing proper outputs.Its values is decreasing from 70mV to 0mV.I also tried it with another sensor one to check if its a faulty piece but it was showing the same outputs. Please help me to figure out the problem.Also please tell me how to find the ppm values from the output readings
ckt2.docx (33.9 KB)