MQ3 (or MQ303a) Alcohol Sensor Arduino Guide

This little device is wonderful, for parties at least. Accuracy wise, it’s not much more than a toy (without some opamps for signal amplification and filtering) but I digress. Just plugged right straight into an Arduino will be plenty of fun, assuming you read the datasheet.


To wire this properly, check out this diagram, which will get further explanation after the break.
Continue reading

Blog at WordPress.com.

%d bloggers like this: