A couple of examples of some software I'm currently developing for my Arduino. It is a controller for the Adafruit NeoPixel 16 led ring, it incorporates a TMP36 analog temperature sensor. The idea is that the pixel ring changes color to more "cool" colors the warmer the room becomes. I'm currently looking into alternatives that have better room-lighting as the NeoPixels are pretty much suited for display or accent lighting, not room illumination.