[sdiy] Re: bcd stuff

[The Old Crow]

  Just use a cheap PIC/Atmel part programmed to be a BCD-to-segment
decoder.  One of the basic app. notes on the venerable PIC16C54 is a
display decoder.  It has enough horsepower to even do multiplexed displays
(I've done 4 LED displays for the ratio display of an as-yet un-named
synth module...)

  Here are a couple appnotes dealing with mulitplexed LED displays.

http://ww1.microchip.com/downloads/en/AppNotes/00590c.pdf
http://ww1.microchip.com/downloads/en/AppNotes/00529e.pdf

Crow
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On Tue, 3 Aug 2004, Oakley Sound wrote:

> Or a single 2716 EPROM programmed so that its eight outputs were
> directly decoded by the address lines. I did that for the LED display
> for my original Walshbank in 1986. But they probably don't make that
> particular EPROM anymore, but I guess the principle still is OK.