Just some random thoughts on construction, since Momyar made the leap and did all the hard work.
Now that I see her version, and read her issues while making it,
I think it would be easier to put together by constructing larger square sections than long rows.
I'd break the QR code into 9 sections, and then some of those sections (if needed) into smaller sections.
(the picture is only for an example).
for use as a roadmap.
As long as you know what your grid size is, you can pre-cut some 2 or 3 or 4 patch long pieces, so the whole thing isn't all made of indivdual squares.
Don't forget to add seam allowances when cutting.
It's like building blocks, just keep making the smaller sections and joining them together.
Usually at least 2 or more of the corner squares of a QR code are squares with borders around them.
Less sewing to do those with longer strips.
Much easier.
If I'm counting correctly, without the outer white border, it looks like the code is 25 across.
So a one inch grid would be 25" (duh), and using 1.5" squares would end up at 37.5" w/o border.
You could make a bunch of blocks, hiding "sayings" or messages, for a larger quilt.
Like this:
http://myleftone.com/2011/02/07/pres...qr-code-quilt/
Between the Smileys/Emoticons and the QR codes, it opens the possibilities to make some some pretty humorous, personal quilts.
Thanks again for sharing a really nifty idea.