It’s Memorial Day weekend and you have nothing to do but brew, drink, and eat. But you could make your future brewing a little more productive with the very clever — and slightly challenging — UberFridge.
Homebrewer Elco Jacobs has posted a very detailed and easy-to-follow guide on how you turn an Arduino Nano and Asus router into an internet-connected temperature controller for your fermentation needs. Total cost? A couple of hours and about $100-$125, assuming you have a fridge. Not the cheapest project, but given that fermentation temperature has a major effect on the outcome of your homebrew, it’s not the worst money you could spend.
Jacobs has posted the code needed to run the whole system on Google Code, but his guide is definitely the place to start.