Jurek and the Amazing Techno, Colored DreamWall

Jurek and the Amazing Techno, Colored DreamWall

The title is mostly a placeholder, as I haven't really figured out a name for it yet. This project is a wall hanging that consists of semi-large triangular pixels using discrete RGB LED's and PWM to control intensity levels of each LED, resulting in a 4096-color display.

Tuesday, March 21, 2006


I made decent progress over the weekend using the new method. I completely cut up a 2'x4' piece of plywood (1/4", I was able to find some 1/8" stuff so I can go pretty thin), making 13 pieces. 11 are 44" long (the width of the wall) and 2 are 22" long. If you do the math, there's not a whole lot of material left over as waste (48 sq. in. total, out of 576 sq. in., which is 92% utilization).
For the internal walls, I need 54 pieces:
  • 24 @ 44"
  • 6 @ 38.5"
  • 8 @ 33"
  • 8 @ 22"
  • 8 @ 11"
So in overall lengths cut, I am 29% done. In pieces cut percentages, I am 24% done. Again, because of time and noise constraints, I really can't work on it any more until the weekend.
While I was building and testing the strips of wood, I felt nostalgic about the balsa wood dinosaurs that were popular in my youth. I had about a half dozen of them myself and several of my friends had many more than I. Anyone else remember those?

I have completely soldered 2 LED triplets (out of the 240 I need), complete with inline resistors, and terminated with a 2x2 header socket. They each took me about 30 minutes to do, but I'm still refining the procedure for doing them, so the time per LED wire will probably drop slightly. Each LED triplet has:
  • 3 LEDs (red, green, & blue)
  • 3 resistors
  • 13 soldering joints
  • 11 pieces of heatshrink tubing
  • 3 twisted pair cables
  • 1 4-conductor cable
  • 4 crimp connectors
  • 1 4-pin socket

Website Updates
I would normally have included pictures with this posting, but the friend that is lending me server space and bandwidth for pictures (evilducks.net) changed hosting companies and hasn't set up an account for me to upload files yet. Pictures will come!

I have added some lame bargraphs on the sidebar to track progress of various aspects of the project. These will be updated whenever I make progress, not only when I make a blog posting. Hopefully, this will help slightly with motivation. We'll see.
I have tried it in Opera, FireFox, and IE. It works properly in Opera and FireFox, but the bars don't show up in IE. Stupid IE. I'm not a web expert, so I don't know how to fix it so it does. If anyone knows CSS well enough to take a look at the code, let me know and I can send you the template to look at. (Or if you can discern it just by looking at the HTML, then by all means go ahead and try and let me know!)

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