Overview
- Sensitive for alcohol, ethanol
- Output voltage boosts along with the concentration of the measured gases increases
- Fast response and recovery
- Adjustable sensitivity
- Signal output indicator
Specifications
- Power: 2.5V ~ 5.0V
- Dimension: 40.0mm * 21.0mm
- Mounting holes size: 2.0mm
Applications
- Car alcohol alarm
- Breathalyser
How to Use
In the case of working with a MCU:
- VCC ↔ 2.5V ~ 5.0V
- GND ↔ power supply ground
- AOUT ↔ MCU.IO (analog output)
- DOUT ↔ MCU.IO (digital output)
Development resources: demo codes, schematic, datasheets, etc.
Wiki: www.waveshare.com/wiki/MQ-3_Gas_Sensor
Package Content
- MQ-3 Gas Sensor x1
- 4-pin custom connector jumper wire x1
