Hi,
I'm afraid I have to admit that I got fascinated by 'charlie-plexing'
lately, a method to control many leds with few wires. See for example
http://en.wikipedia.org/wiki/Charlieplexing
A nice example of this is Jimmy Rogers' LoL (Lots of Leds) shield for
the Arduino: a 9x14 matrix of 126 leds controlled by 12 pins. See:
http://jimmieprodgers.com/kits/lolshield/makelolshield/
For this board I found mostly references to C-libraries and programs.
I thought it would be a challenge to control this board with a PIC and a
program written in Jal. That proved to go better than I had expected! I
started with a smaller setup for 10 and 12 leds, but finally got the
9x14 matrix under control as well.
You can find results in Jallib (http://code.google.com/p/jallib/)
Look for library 'charlie.jal' and samples for 12f683, 12f1840 and 16f1786.
Regards, Rob.
--
R. Hamerling, Netherlands --- http://www.robh.nl
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