This is USB christmas ball.Wery easy and nice one evening project. Sits next my mom's iMac wery nicely. Made it almost year ago and publised instructable just now...

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step 1You'll need:
You will need:Materials:3 LED's1 100ohm or 47ohm resistor1 USB cable1 medium size christmas tree ballglue (epoxy or hot glue)1 empty plastic bottle OR 0.5l plastic cup1 pla…
step 2LED's
First you'll need to make the lights. Do this like you see in a pictures.
step 3Prepair the ball
Now take off balls top.
step 4Finishing toutches
step 5Enjoy!
Plug your ball to your computer or give it as a present and be ready for christmas!
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http://www.instructables.com/id/USB-christmas-ball/