On Thu, May 26, 2005 at 02:30:33PM -0700, phil B wrote:
> There are lots of techniques for multiplexing pins to
> get more than 1 LED per pin.  Numerous microchip app
> and design notes on this topic.  Look at how 7 seg
> displays are done to get an idea (you may not need
> drive transistors).  There was also a microchip
> newsletter (iirc) article from about a year ago that
> got a goodly number of LEDs per pin by using output L,
> H and high Z (input) plus a bit of mental gymnastics. 
> 
> 
> My favorite answer is a 12F509 + 2 74HC595s (to drive
> up to 16 LEDs) but I suspect thats not what is being
> looked for.

Phil,

It begs an interesting question. Why is that combo better than
a 28 or 40 pin PIC?

BAJ
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