You just need a mini fridge, and as it turns out, Walmart is having a limited-time deal on one of its most popular models.

This is all worth it because a well-controlled fermentation chamber results in a superior batch of beer. They put their laser cut case on top of the fridge, holding an LCD, Raspberry Pi ...

[Paul Stacey] sent us his solution of pairing up a CPU cooler kit with a beer fridge. The CPU heat sink is cut out of a liquid cooling kit and discarded. In its place a loop of plastic tubing ...