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Topic: Centipede Shield - also a contest! (Read 7 times) previous topic - next topic


I had an idea for a "distributed production" alphanumeric electronic demonstration sign. the idea is demonstrators get a kit in the mail containing precut led strips and wire, and construct a 2X4 foot 14-segment alphanumeric 1-character sign. the wires all go out to a plug at the bottom. Now - one guy comes out with the same sign, but he also has the control board - arduino+centipede, to control all 5 signs (incl. power supply and switching with uln2003) , and end up with a 5-letter, 10X4 foot electronic sign! I know this does not make use of the input and only uses the centipede as an output expansion, and I know that for the same price I can almost get an arduino mega (which is good for 4 1-letter signs) , but I still want it!
I also discussed this with some guys from graffiti research lab (google it) and they were cautiously interested.

diagram will be up soon. thanks for reading!


Tomas: This won't help you in the contest, but you may want to suggest it to the GRL gang....

Instead of LED signs and lots of wires, put the 14-segment displays on the backs of jackets, using EL wire, powered by batteries, uniquely labeled with a QR code patch on the front (where it's harder to see mid-demo), and control it though an iPhone app. Once enough of these are floating around, you could do impromptu flash-mob signage.


Lots of good ideas so far, glad so many of you think this might work for your projects.

Based on the entries so far, I want to clarify a few things.

PWM may be possible, but probably not too accurate over I2C. I would say that if you're controlling LEDs, you should plan to just have them either on or off. The same goes for LED matrix driving...it could work, but there are probably better and more reliable ways.

Since these are general purpose I/O, I'd like to see at least some mixing of functions. Input-only and output-only are valid uses for this board, but don't exploit any advantages this would have over some shift registers.

I am also paying a lot of attention to how the entries are written, and really appreciate the ones with full details and examples of what you've already done to work on the project. From these posts, it's pretty easy to tell when someone knows what they're doing, and has the ability and motivation to follow through. I would really like to get feedback on these and not have them sit on a shelf until the Arduino is obsolete. If any of you want to expand on your project a little more, that's fine. Feel free to post more details, as long as you get them in by Friday the 13th they'll be included in the overall decision.

Thanks to everyone so far....
Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store


Consider mine withdrawn.

I needed more I/O which the Centipede could give me

But i also need more room for my program so i am upgrading to the Maple (http://leaflabs.com/Maple)

and that will give me the I/O needed also. But if i need more i can add your board on later.


i'm intending to make a hologram generator using the pesistence of vision concept.

its going to consist of two 256x256 RGB matrices (think big, might get at least a small part of it right  ;) ) mounted on a axel (1800rpm+) as shown in a rough top down sketch.....(gimp is not a friendly alternative to MSpaint, but i not complaining  :-/ )

i intend it to show 3D renders at 30fps min when complete.... so i guess the shift register nature of the centipede wil be useful...

[edit] sketch after break...

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