MQ-5 Gas Detection Alarm Circuit Sound and Light Electronic Teaching Training DIY Parts Production Sensor Kit

Feature Product name Gas detection alarm circuitSupply voltage DC5VAppearance size 60 30mmSensor MQ 5NOTE This kit requires self assembly Package includes 1 x DIY KitComponents ListComponent nameComponent positionQuantity1 4W Resistor 1RR111 4W Resistor 1KR2 R5 R7 R9 R1061 4W Resistor 10KR3 R421 4W Resistor 330RR811 4W resistor 220KIC41Ceramic capacitor 104C1 C223MM yellow LEDD1 D22Transistor S9012Q11Trivalent chromium S9013Q21In line chip LM393U11Voice chip C002IC415V Active BuzzerB11Straight pin header 4PP11Double female Dupont cable 2PP11MQ gas sensorMQ 51PCB board1Principle The gas sensing material used in the MQ gas sensor is tin dioxide with low conductivity in clean air When there is flammable gas in the environment where the sensor is located the conductivity of the sensor increases with the increase in the concentration of flammable gas in the air big External oscillator resistance 100K 240K the larger the resistance the slower the sound speed the buzzer can be driven to sound after power on Pin 1 is grounded pin 2 is output pin 3 is the sound terminal pin 4 is connected to the positive pole of the power supply and pins and 6 are connected to the shock resistance.