Producing cold/reducing temperature using arduino on a small scale

I'm looking for a way to reduce the temperature of something on a small scale using an Arduino as the controller. I've done a fair bit of research but I can't find any hardware that achieves this purpose. Does anything like this exist for Arduino? And if not is there some other piece of hardware that I could adapt to use with Arduino? Don't need a full tutorial just a pointer to the right hardware ๐Ÿ™‚

Touch here for the full post on the Arduino Apprentices tumblr

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