LEDs Was: Re: Emulation (Was: Emulators of Classic Computers))

From: Rob O'Donnell <classiccmp.org_at_irrelevant.fsnet.co.uk>
Date: Fri Jan 16 04:26:40 2004

At 04:43 16/01/2004 -0500, der Mouse wrote:

>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.

Received on Fri Jan 16 2004 - 04:26:40 GMT

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