Hackaday Links: Sunday, June 9th, 2013

hackaday-links-chain

This week we saw an interesting animated motorcycle tail light over on Reddit. But there wasn’t really enough background to get its own feature.

The NeuroKnitting project captures brainwaves by weaving them into a scarf.

On Semiconductor is showing off an 8x8x8 LED cube which they claim as 12,000 LEDs. We can’t figure out where all those LEDs are used in the design, but maybe you can. Here’s one that we know has 4096 LEDs in its matrix.

[Jeff] used hard drive platters as the disc section of his original Enterprise desk model.

Play around with an SNES controller and Arduino by following [Damon's] guide.

Hackaday Alum [Jeremy Cook] posted an update of his laser graffiti project. His earlier effort used camera tricks to capture the image but this time around he’s exciting phosphorescent glow material to make a persistent display visible to the human eye.

This server hides in plain sight after being wrapped in a hard cover book binding. Hopefully this won’t cause heat dissipation problems.

[Trumpkin] built his own Nixie tube wristwatch which we think has the potential to be as neat as the one [Woz] wears.

 

Comments

  1. VimTo says:

    I count a 16x16x16 cube, so tri colour is over 12k LED. I think they rushed the post… ‘LED Bulbs’ ???

    • chopperdave says:

      The cube might be 8 inches on a side, though.

    • reggie says:

      I’m with Vimto, I don’t think it was rushed at all, someone just wasn’t paying attention, it’s clearly 16x16x16 = 4096 , if it’s really tri-colour and not RGB then it’ll be 8192, if it’s actually RGB then it’ll be 12288 leds.

      There are so many things wrong in just that part that I’m not sure I’d want to purchase much of on-semis LED stuff :-D

      • citizenjapp says:

        Yes, I think the person the wrote the script incorrectly multiplied (16 x 16 x 16) x 3 with the ’3′ representing the (R-LED + G-LED + B-LED), to get 12288.

        Obviously, it should be (16 x 3) x (16 x 3) x (16 x 3) = 110592!

    • Macro says:

      Yes, I think the person the wrote the script incorrectly multiplied (16 x 16 x 16) x 3 with the ’3′ representing the (R-LED + G-LED + B-LED), to get 12288.

      Obviously it should be (16 x 3) x (16 x 3) x (16 x 3) = 110592.

  2. Gustav says:

    12,000 LEDs. Guess they’re thinking one red, one green and one blue.
    Times 4096 ≈ 12,000.

  3. Miff says:

    As most of the Reddit commenters said on the motorcycle hack, it’s illegal to have animated red lights on a non-emergency vehicle, nor is it legal to have red turn signals.

  4. Rob says:

    well I dunno how they got that wrong, but that cube looks like 16x16x16 rgb to me…

  5. Liam Jackson says:

    Yeah it’s a 16x16x16 cube. Multiplied by 3 for rgb gives the >12k number.

  6. John says:

    Its actually a 16x16x16 cube (4096 LEDS) but they are RGB so they are counting each one as 3 (4096 * 3 = 12288 LEDS)

  7. vonskippy says:

    In my best Picard voice “There…. are…. 4…. I…. mean….. 16x16x16….. lights”.

  8. macona says:

    .The lights look 1/2″ apart, so I am guessing 8″x8″x8″

  9. austin says:

    “The NeuroKnitting project captures brainwaves by weaving them into a scarf.”
    maybe pedantic, but the neuroknitting project KNITS brainwaves into a scarf, it doesn’t weave them, thats a totally different method of producing fabric.

  10. HackerK says:

    The comment under the video does said “…This is an 8 in x 8 in x 8 in , 3 dimensional display using over 12,000 LED devices…

  11. Gravis says:

    for the LED cube: at 3:10 ( http://youtu.be/Lax2zxvL5Kc?t=3m10s ) the cube has a display that reads “Tri-color LED Cube (LED)” though they can turn red, green and blue. so yes, it’s technically ~12K LEDs.

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