co2 Sensor connection with arduino

[Subhash]

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  

[Prabakaran P M]

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.

[Author]

Posts