Description

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)