>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.
I don't know the name of it... but I remember that there was some
sort of a contest a few years ago... Contestants were provided a
number of items and had to build a display. The winning design
had some sort of saw-blade which was moved by use of an
electromagnet. The vertical set of LEDs would display the
lines which comprised a character, and the saw-blade was moved
back and forth in synch in such a way that when vieing the
reflection of the LEDs in the shiny surface of the moving
blade, one could make out characters.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '_at_' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL:
http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Received on Fri Nov 13 1998 - 17:47:20 GMT