Alcohol sensor mq arduino breathalyzer wiring sparkfun schematic mq3 diagram circuit data electronic calibrating gas detector project electronics simple presented Simple wiring question Patent us6726636
Simple wiring question - MQ3 Alcohol Sensor - SparkFun Electronics
Patents breathalyzer drawing
Simple wiring question - MQ3 Alcohol Sensor - SparkFun Electronics
Patent US6726636 - Breathalyzer with voice recognition - Google Patents