Thanks,
That's exactly what I am looking for.  What about creating the time? Is
there a chip that I can use readily to create the watch, or should I
develop my own program on the PIC?  I though of Texas Instrument
BQ4802LYDSH IC, but could not find enough documentation on using it.
Any ideas?

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of M. Adam Davis
Sent: Friday, November 01, 2002 7:40 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: Digital Watch with images

Good luck.

The LCD you're looking for is an ultracompact COG (chip on glass) type
graphic LCD.  These are used in cell phones and other small devices.
 They can be had for under $25 each from
http://www.crystalfontz.com/products/12864a/index.html#CFAX12864ANFH

A little larger than a quarter.  The COG means the controller is on the
glass itself, so you don't have the bulk of another pcboard.

I'd recommend as small a PIC as possible.  The controller has both
serial and parallel modes, and an onboard voltage booster (which, I
believe, means you don't have to supply the normal -8v for the LCD
driver) and runs from 3-5 volts.

You should be able to use as little as an 8 pin pic, a few capacitors,
and a 3v lithium watch battery to run this thing.

Be aware that while this isn't a terribly difficult project, it isn't a
beginner's project either.  Be prepared to spend a lot of time learning
how to program the PIC, especially for timing, and another big chunk of
time for LCD interfacing.  This can be daunting stuff if you're
unfamiliar with it, but it's doable.

It's probably more work than designing phase control dimmers, which was
one of my first PIC projects.

Good luck!

-Adam

Saeed, Saeed A wrote:

>Hey all,
>
>I wanted to build a digital watch that would display images in the
>background in association with certain time (as an alarm set by the
>user).  It would also be nice if I can play some voices at that certain
>time.  I have done some programming with PIC, but not a great deal.  I
>was wondering if someone would recommend a PIC to choose, and a dot
>matrix LCD.
>
>
>
>Any ideas?
>
>Thanks!
>
>--
>http://www.piclist.com hint: PICList Posts must start with ONE topic:
>[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>
>
>
>
>
>

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics