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Acetronics2
- 24th January 2007, 13:45
An interesting idea ...

http://pdfserv.maxim-ic.com/en/an/AN1880.pdf

Alain
Melanie
- 25th January 2007, 09:16
Charlieplexing... Gawd I hate that term!

PBP Example provided here almost a year ago...

http://www.picbasic.co.uk/forum/showthread.php?t=3510

Doesn't matter what you find on the internet, we probably did it here on this forum first... Heart Transplants, DNA resequencing, cloning, USB Coffee Warmer (I kid you not, that's one of my hair-brained ideas that actually went to market)...
Acetronics2
- 25th January 2007, 09:38
Hi, Mel

A further reading could have shown they drive 12 leds ... with the 10F pics

http://www.edn.com/article/CA6399101.html?ref=nbdi&industryid=44217&text=12+leds

Challenge open !!!

Have a happy new year.

Alain

PS: of course, the same can be done with PbP !!!
arniepj
- 25th January 2007, 17:54
Here's a 256 Led ,8 I/O pic driven application you can buy for $6.50 at http://www.allelectronics.com/ . The Leds are actually tied together in parallel and in a matrix.I just put together a star shaped xmas display for next season using 5 strings tied to a single 16F628A thru driver ic's.