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Blinkenschild

A portable shield that can be used in various scenarios where one of them is subversive rebellion on the streets.

overflo
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  • Metalab Project wiki
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metalab hackerspaceshop schild schield Demo

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Blinkenlights, LED Displays & Matrices
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This project was created on 03/10/2014 and last updated 2 years ago.

Description

One day i woke up with the urge to rise up and stick it to the man.
And what would be more suitable for that job than blinky lights eh?

I used:

960 RGB pixels - RGB-123 ( http://www.hackerspaceshop.com/ledstrips/rgb-123.html )
a microcontroller - teensy 3.1 ( http://www.hackerspaceshop.com/teensy/teensy-3-1.html )
a bluetooth receiver (http://www.hackerspaceshop.com/teensy/teensy-3-1-bluetooth-module.html)
a SD card slot (http://www.hackerspaceshop.com/teensy/teensy-3-microsd-module.html)
lots of LiPo
and a custom Android.app

The main documentation for this project is on the metalab wiki. ( https://metalab.at/wiki/Blinkenschild )

Over 200 hours of work went into this "weekend project" but the result is pretty groovy.
We even made a video with a horse for reference.


Details

Components

  • 15 × RGB-123 64 Pixel WS2812B-10 Board (http://www.hackerspaceshop.com/ledstrips/rgb-123.html)
  • 1 × Teensy 3.1 A very small powerful microcontroller (http://www.hackerspaceshop.com/teensy/teensy-3-1.html)
  • 1 × Micro SD card slot http://www.hackerspaceshop.com/teensy/teensy-3-microsd-module.html
  • 1 × Bluetooth Serial module http://www.hackerspaceshop.com/teensy/teensy-3-1-bluetooth-module.html
  • 1 × Wood, Acryl, Spraypaint, Foam inlay, Aluminium profiles
  • 15 × LiPo 400 mAh Because i had a lot of them

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overflo wrote 03/03/2016 at 22:05 • point

Broken link. Could this be spam for a kickstarter campaign?

  Are you sure? yes | no

josephchrzempiec wrote 09/21/2015 at 02:36 • point

How many leds are going across and down?

  Are you sure? yes | no

Zardoz wrote 07/25/2014 at 15:32 • point
This a real GEM of a project !, I can see this taking off sometime, 21st century protetestors, all it needs is a few hundred perps to get airplay

  Are you sure? yes | no

Eric Evenchick wrote 04/04/2014 at 15:31 • point
Nice sign, bonus points for the HaD logo :)

Did you have any issues with hooking up 15 LiPo cells in parallel? It looks like you have a bunch of them going into a junction box, what's inside there?

  Are you sure? yes | no

overflo wrote 04/04/2014 at 15:55 • point
hey,

the RGB-123 use WS2812B-10 leds
the datasheet rates them between 3.5 and 5.5v
some guys had trouble running WS2812B at 5V with 3.3V signal levels.
turns out the WS2811 datasheet says that the signal / power ratio should be no less than 0.7.
running the whole setup at 3.7-4.2V from the lipos means that we are well within the 0.7 ratio with our 3.3v signals.
thats why i run them DRIECTLY from the lipos and use no levelshifters or step-up converters anywhere.

the box is just a bunch of JST connectors and fat wires to transport the current away safely.
everything worked out much better than expected :)

  Are you sure? yes | no

Eric Evenchick wrote 04/04/2014 at 16:30 • point
Ah, I guess this would work out fine if they are all charged to begin with. I would be worried about mixing LiPos with different states of charge.

  Are you sure? yes | no

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