Modern Blinkenlights

From: der Mouse <mouse_at_Rodents.Montreal.QC.CA>
Date: Sat Jun 19 23:28:29 2004

> This is not exactly hard to design. To do it purely digitially, you
> can use a 4 line to 16 line decoder (e.g. a 74x154) if you want 'dot'
> mode. To do 'bar' mode, it's a simple exercise to design the logic,
> and if you like burn it into a PAL (or PROM, or...).

PAL? PROM? What overkill. What's wrong with diodes and wire-OR?

Well, besides needing 136 diodes, I suppose. :-) Or somewhat fewer if
you apply a little intelligence; I can bring it down to somewhere near
110 without much trouble, probably further with a bit more thought
(and/or a bit more additional logic).

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Received on Sat Jun 19 2004 - 23:28:29 BST