Keyes Brick MQ-2 Smoke Sensor Anti-reverse Plug White Terminal Gas Sensor Module Board Support micro bit

Description This is a commonly used smoke sensor that uses MQ 2 combustible gas and smoke sensor components The gas sensing material used in this component is tin dioxide SnO2 which has a low electrical conductivity in clean air When there is a flammable gas in the environment where the sensor is located the conductivity of the sensor increases as theconcentration of flammable gas in the air increases The sensor is highly sensitive to liquefied gases propane and hydrogen and is ideal for the detection of natural gas and other combustible vapors It detects a wide range of flammable gases and is a low cost sensor for a wide range of applications The sensor is compatible with various microcontroller control boards such as the microcontrollers We provide a method for using this sensor in conjunction with the UNO R3 microcontroller When using the A0 terminal reads the analog value of the corresponding gas the D0 terminal is connected to an LM393 chip comparator we can adjust the measured gas alarm critical point through the potentiometer and output the digital value at D0 When the measured gas content exceeds the critical point the D0 terminal outputs a low level when the measured gas content does not exceed the critical point the D0 terminal outputs a high level The sensor comes with a 2 54mm anti reverse plug white terminal When in use we can connect to the MCU with DuPont cable To facilitate wiring we specially designed an expansion board that is ful