This Instructable is a cheap Yoghurt maker, but my first though was for brewing beer! It is a simple construction of a polystyrene box, a thermometer and a high power resistor to provide the heat. It’s a pretty nifty design, and could be used to keep anything at a constant temperature above room temperature. It could even be used to keep food warm.

Adam RogersI am the the founder and editor of Codeduino. I'm a developer by trade, and a maker by night. I've been 'making' ever since being introduced to Arduino at university - my final year project was an Ableton Live controller based on Arduino.

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