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MQ-3 Alcohol Ethanol Sensor Module
Product description: Mainly applicable to alcohol vapor The analog output voltage increases as the concentration of the gas in the detection environment increases Fast response to recovery features Sensitivity adjustable Signal output indication Product parameters: Working voltage: 2.5V ~ 5.0V Fixed hole size: 2.0mm The main purpose: Car alcohol gas alarm and portable alcohol gas detector Interface Description: (access MCU as an example) VCC: then 2.5V ~ 5.0V GND: Connect to GND AOUT: connected to MCU.IO (analog output) DOUT: connected to MCU.IO (digital output)