This is a really simple ambient display for temperature using an arduino, an adafruit RGB backlight LCD, and a temperature sensor. The LCD displays the temperature in Fahrenheit and Celsius and adjusts the color of the backlight depending on the reading. An ideal range is set at 61F to 67F. If the temperature is in this range the backlight will change green. Above this range and the color will change red, below the range it will change blue. The great thing about these kinds of displays is that you can immediately get some rough information from across the room.
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
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