> On Jul 1, 2005, at 12:34 PM, Mario Mendes Jr. wrote:
>
>> I'm working on a little project and have just one i/o pin left in the
>> pict.  Two things about it, first, is that I feel that really must find
>> something for that pin to do as not to go to waste =) and, second, I
>> would really like to include a keyboard/keypad in this project.

There is a high level description of the 1 pin analog keyboard matrix in
the Tips 'n Tricks book, Tip #7. Its just the theory, and does not give an
example. http://ww1.microchip.com/downloads/en/DeviceDoc/40040b.pdf

> I've been including a provision for one of those IR RC detector modules
> on circuits where I have an extra input pin.  I figure a TV remote
> control
> is a fine keypad, and it's only a small matter of programming away...

I have a "blinkie" that has the IR detector, using RC-5 IR standard. The
sorce code is on the link I list bellow. I also used their tip#2 for
driving 38 LEDs (can do 42) with 7 IO lines on a blinkie board, thier
diagram in the book is wrong!
http://www.2dkits.com/zencart/index.php?main_page=product_info&cPath=1&products_id=1

Dwayne Forsyth


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