Waveshare MQ-3 Gas Sensor, MQ-3

Overview
1. Sensitive to alcohol, ethanol
2. The output voltage increases together with the increase in concentration of the measured gases
3. Rapid response and recovery
4. Adjustable sensitivity
5. Signal output indicator

Specifications
1. Power: 2.5V~5.0V
2. Size: 40.0mm*21.0mm
3. Mounting hole size: 2.0mm

Applications
1. Car alcohol alarm
2. Breathalyzer

How to use
In case of working with an MCU:
1. VCC: 2.5V ~ 5.0V.
2. GND: power supply ground
3. AOUT: MCU.IO (analog output)
4. DOUT: MCU.IO (digital output)

Package Contents
1. MQ-3 gas sensor x1
2. 4 Pin Custom Connector Jumper Cable x1