My cheese making just recently started when I realized that I wanted to start a geeky engineering project. I figured that I could make an automatically controlled cheese cave for aging my cheeses.
In short, I have a microcontroller (miniature computer) monitoring the temp and humidity via two sensors inside of a mini fridge. When the temp is too high the microcontroller turns the fridge on and eventually turns the fridge off when the temp is satisfactory. The bottle that you see is actually the water resevoir for a travel humidifier. I use this humidifier to regulate the temperature inside of the cheese cave.
So far it is working great! My temperature deviates only +/- 1 degree F and the relative humidity deviates about +/- 3%. This has turned out to be really fun. I'm thinking about tracking down another fridge and making another one so I can make more cheese.