16 Jan
2004
16 Jan
'04
9:15 a.m.
For Parallel interfaces, there are several known software packages
available that I know of for LED and LCD display controllers (obviously,
many more for LCD now a days including a couple free ones). I heard of a
free-ware one, but I'd have to look again to find it. Most of them are
Windows (bleh) or Linux based.
-John Boffemmyer IV
At 05:26 AM 1/16/2004, you wrote:
At 04:43 16/01/2004 -0500, der Mouse wrote:
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Founder, Lead Writer, Tech Analyst
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Actually, I'm a bit interested in the other
direction: how _small_
do/can LEDs get? (And how much heat do they produce?) I've been
pondering something, but in order for it to be workable I need to be
able to cover fairly large areas with some kind of display technology
at a resolution no worse than about 75dpi. Since "large areas" means
dozens of square feet, too large for a CRT, all I've been able to think
of are LEDs. But I don't know how practical (or more likely how
drastically impractical) that is.
I remember building a LED matrix as a project when I was an apprentice
(for Ferranti Computer Systmes). 8x7 LEDs, driven by the 8-bit parallel
user-port on a BBC B. Made some nifty patterns, as well as scrolling
text, etc. I still have it, but not sure I can find my software now.
Anyway, a quick google turned up a mfr that does LED matrix modules. This
one looks close to your dpi requirement
http://www.okaya.com/HP3/image/RG160160-C.pdf (if I am translating 160
dots in a 63.5mm wide module correctly) you might have to deal with the
'margin' though. But I am sure if I find a hit that quick, there will be
others about.
Rob