Welcome to another Arduino project video! Today we are going to build an Arduino Breathalyzer. It is a device that senses alcohol in the air and prints the value it reads on the display. We use an MQ-3 gas sensor along with an I2C OLED display on an Arduino Mega. It is a very easy project to build, it wont take us more than 10 minutes. There is a lot to cover so lets get started!\rbr\rbr--------------------\rbrWHERE TO BUY\rbr--------------------\rbr\rbr1. MQ3 sensor: \rbr\rbr2. 0.96 I2C OLED display: \rbr\rbr3. Arduino Mega: \rbr\rbr4. Small Breadboard: \rbr\rbr5. Wires: \rbr\rbrFull disclosure: All of the links above are affiliate links. I get a small percentage of each sale they generate.