I've spent the last year determining how I can combat the hot temperatures to brew beer. I resort to a swamp cooler and spend significant time adding frozen water bottles in order to bring the temperature down.
This kickstarter claims that via its "patent pending solid state cooling system that pumps heat out of your fermenting beer using tiny heat exchange chips" it can reduce your fermentation temperature to LAGER TEMPS.
Surely if this is possible it can be replicated, DIY, with a Raspberry Pi and/or Arduino. I don't even care about lager temps at this point; If I can simply reduce temperature to ale temps that would be great!
As an aside, I'm not about to make a donation to this at the moment. BeerBug is a very cool idea (measures specific gravity of your wort as it ferments) that was started by kickstarter, but it costs $250 for each carboy. I have 8 carboys brewing simultaneously and would rather do it myself.
TL/DR How is it possible to reduce temperature without a fridgerator or swamp cooler or other prehistoric device?