Today’s electronics allows doing many things, you wouldn’t dare to imagine few years ago. Most of sensors became compact and cheap, so every hobbyist can make wonderful and practical things on a low budget. Playing around with Alcohol Gas sensor sounds really interesting as it has some practical use… we all know what is this about, isn’t it?

Sensor itself is very simple to connect – it requires one ADC input of Arduino, and depending on amount of Alcohol Gas in your breath output voltage changes that can be interpreted in ether way like in this case with bar of 10 LEDs. This is very simple and inaccurate way and only may fit for parties to make drinking more fun (if it can be considered a fun thing).  Ok, now it’s time for testing!