What is the purpose of the onboard potentiometer used for the MQ sensor (the small little blue box)? Isit represents RL here? or we need to add on extra resistor to represent the RL here?
What is the purpose of the onboard potentiometer used for the MQ sensor (the small little blue box)? Isit represents RL here? or we need to add on extra resistor to represent the RL here?