Christmas decoration

In Christmas times in Sweden, by tradition we keep these kind of lights in the windows. Usually they use small incandescant bulbs. (don't know exactly why we do this, maybe because it's so dark outdoors).

I thought I would design something a bit more fun around this concept.

This design uses LED's that slowly change color. They start in sync and then as time passes they get kind of random. It's a calm effect, not stressfully blinking.

This requires a bit of soldering but it's quite simple. I have included an electrical drawing and some links to the stuff needed on ebay.

The design is made to run on 5V DC, with the suggested cable this could be supplied through and USB charger or similar USB port. It uses less than 200 mA current.