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Microcontroller › Arduino › co2 Sensor connection with arduino
hello guys,
i have a question. i bought a CO2 sensor mg811 and i have not got the sensor board. i google a lot but didnt got any relevant result about connecting the sensor with my arduino board for sensing thw gas in ppm. pls guys help me
Hi subash,
Connect 1, 3 and 5 pins to the ground. Connect vheat to 5v to enable the heating of sensor. 6 and 4 pins are the output pins of the sensor
which can be connected through lm324 op amp circuit to the analogue pin of the arduino.