I would be tempted to use one of the 8pin RTCC (real-time clock/calendar)
chips.  Would give good accuracy and only need 2 i/o pins leaving plenty for
display drive.  since freq is only 32K, you can drive PIC and RTCC with this
crystal and save on power too.

John Mullan


-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of -=jugggernut=-
Sent: Saturday, June 03, 2000 12:50 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PIC]: Digital Alarm Clock source code and schematics


Hi!

I like to build a digital alarm clock using PIC 16F84, the display format
must be Military time.

The following problems are:
1. A certain website discuss about PIC 16F84 timer. The 1 second delay well
not be exactly 1 second because of the error. How can I made an error
correction with this?

2.Can I set an interrupt (ISR)? for the setting of the alarm time.

3.Is there anybody can share me a simple Digital clock schematic using  PIC
16F84.

Thanks in advance...

Best regards,

-=jug=-

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just hoping that your okay!!!