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Phyllotaxis: An audio-reactive LED display

354 points · 50 comments · evakhoury

  1. petsfed · · focus · HN ↗
    Because I desperately want to make my own (and maybe modify it a bit to fit my own hardware biases), I found the repo for the hardware:

    <a href="https:&#x2F;&#x2F;github.com&#x2F;jagnat&#x2F;fib_quintant_minimizer" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;jagnat&#x2F;fib_quintant_minimizer

    It would be really neat if the author could put the relevant licensing stuff on there.

    (but mainly, I want to hear about how they accomplished 5-fold symmetry!)

    1. jagiii · · focus · HN ↗
      author here, good digging! I added the MIT license.

      Getting 5-fold symmetry to work was tricky, but the repo you found has the processing sketch where I figured it out. I basically took the point generation process I described and rotated it upon itself 5 times. I tested this with different radial symmetry numbers actually, and 5 also happened to look the best and also was convenient for manufacturing the PCBs.

      Then I had AI add the ability to rotate a bounding rectangle for one &#x27;quintant&#x27; around the shape, and found the division of cells which minimized the area, since PCB cost scales with that.

      1. h-c-c · · focus · HN ↗
        Friend, if you can find one, get yourself a Fadecandy board. Maybe not that easy since it&#x27;s technically discontinued. The dithering gives the smoothest &#x2F; sexiest fading possible.
      2. Already__Taken · · focus · HN ↗
        if you can manufacture the board on both sides you can probably alternate top&#x2F;bottom and panel rows with no waste in a straight line.
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