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A comment on Turning GE Color Effects G-35 Christmas Lights into a 7x7 display with Arduino.

Re:Turning GE Color Effects G-35 Christmas Lights into a 7x7... by djb_hackernews on Monday November 07, 2011 @09:33AM (#3206374)
If you could set the addresses any way you want, why the odd diagonal configuration? I'm sure it's in the write up, but I must have missed it.

Very cool stuff.

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Re:Turning GE Color Effects G-35 Christmas Lights into a 7x7... by jgrahamc on Monday November 07, 2011 @09:35AM (#3206390)
Actually it's not in the write up, but it's a good question. By going with the diagonal configuration it was easier to solder the LEDs together. There's a bit more space (if the horizontal and vertical spacing is one unit then the diagonal spacing is sqrt(2) units) diagonally than vertically and since the LEDs are asymmetric (have the wired sticking out on opposite sides) this made it mechanically easiest.

Thus I 'fixed' in software a 'problem' created because of the constraints of the physical world.

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