Step 5Putting it all together and suggested modifications
I used the Arduino Diecimila because I'm just getting started. If you are going to build this I would recommend an Arduino varient such as the Adafruit USB Boarduino. This will save you some cash over the standard Arduino board.
Adding more monitors - The Arduino has plenty more I/O pins available. Have it ring a bell or show you the weather(.pdf warning).
Tweak it for your latitude! Adjust the set point triggers in the PHP script. At my latitude, ~47 degrees North, I can see the Northern Lights if the Kp index is over 5 and it is a dark night. If you live further South you should adjust the triggers to higher numbers.
Make it wireless! Hack a Fonera router and hook it to the Arduino. All you would need then is power.
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