MQ-3 Gas Sensor: Alcohol, Ethanol, Smoke
This MQ-3 alcohol sensor is suitable for detecting alcohol concentration on your breath, just like a common Breathalyzer used by police.
The Sensor provides an analog resistive output based on alcohol concentration. The driver circuit is very simple, all it needs is just one resistor. A simple interface could be a 0V - 3.3V ADC.
All you need to do is to power the heater coil with 5V, add a load resistance, and connect the output to an ADC.
This MQ-3 alcohol sensor is suitable for detecting alcohol concentration on your breath, just like a common Breathalyzer used by police.
The Sensor provides an analog resistive output based on alcohol concentration. The driver circuit is very simple, all it needs is just one resistor. A simple interface could be a 0V - 3.3V ADC.
All you need to do is to power the heater coil with 5V, add a load resistance, and connect the output to an ADC.