A sign made of a vertical line of LEDs?

From: Aaron Christopher Finney <aaron_at_wfi-inc.com>
Date: Fri Nov 13 14:12:17 1998

On Fri, 13 Nov 1998, John Foust wrote:

To really put this on-topic, I'm pretty sure I have an article on this in
an Antic magazine. The 8-bit Atari version was patterned after something
similar at Disneyland, IIRC. I'll try to dig up the issue and get back to
you...


> Several times in the past I've seen home-brewed and perhaps
> CPU-driven signs that consist of a single vertical line of
> perhaps a dozen or two LEDs.
>
> The "sign" doesn't appear to be anything but a line of glowing LEDs.
> Only when you view it at a glance, as your vision moves quickly
> from side-to-side, do you see that it is rapidly flickering the
> vertical scanlines of a simple dot-matrix image: maybe the digits
> of the time, perhaps a smiley face, or some other simple image.
>
> Anyone here know the name of this sort of device, so I can web-search
> for others who've made one? It wouldn't be hard to craft. To be
> obliquely on-topic, I've thought about making a simple circuit that
> would be driven by the parallel port of an old PC.
>
> - John
>

Aaron C. Finney Systems Administrator WFI Incorporated
------------------------------------------------------------------------
"UNIX is an exponential algorithm with a seductively small constant."
                --> Scott Draves
Received on Fri Nov 13 1998 - 14:12:17 GMT