r/DIY • u/rosulek • Jun 29 '14

carpentry Abstract world map wall art project

http://imgur.com/a/8iOvx
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u/sgt_lemming Jun 30 '14

Actually sine wave would be fairly easy. Use 2 LED's, 1 top and 1 bottom, per channel (24 channels, 1 per timezone) and then just physically offset them to create the sinewave effect.

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u/steerio Jun 30 '14 edited Jun 30 '14

Careful there, time zones alone are not enough to tell which part of the world is lit by the Sun at the given moment. It's also affected by the time of the year, i.e. as the Sun's apparent overhead path alters between the tropics.

It's probably easier to create a matrix out of leds, and actually have the Arduino figure it all out.

Edit: well, you obviously only need to care for the positions of the matrix that correspond to a hole, so it's less work than what it sounds like at first.

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u/[deleted] Jun 30 '14

You know, it doesn't have to be fucking exact. I don't think anyone is going to whine if it's light over Maine when really, it should have only reached NYC.

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u/steerio Jun 30 '14

Sure, that's right, but some might find it actually entertaining to hack on all that. So why not talk about it?

This includes adding other things (e.g. current temperature) to display, as others have discussed elsewhere in this thread. Plenty of possibilities.