Digital clock need!

Here are a few links that may help you.

Good luck. I built one with huge 7 inch LED displays. After I plugged it in and the digits started counting, I was so proud of myself. That clock is now my pride and joy. I show it off every chance I get. Hope you'll be just as proud of your project.

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Hello, I hope this may help :

Bruno

OMG, check out those prices like $49.99 for a little clock kit! Alot of that stuff looks very high priced to me..............

The PIC16F84 has been replaced with the PIC16F628. There is a digital clock program and schematic using the PIC16F628 at:

-Bill

wrote

There are a number of ways you can accomplish this task. You need to tell us more about your requirements. For example, do you need battery operation or would AC power be ok? How much accuracy do you need? Do you need it to set itself?

BTW, the 16F84 is getting kinda old, the 16F628 or 16F88 might be of interest to you as they are cheaper and have more features.

Here is a good place for some PIC info:

and another really good one:

12V is battery, I need to set it and accuracy may be +(-) 1sec /10 days

LEDs and batteries are a poor mix. Even if running 1 mA/segment, it will drain the battery pretty fast -- and be pretty dim. LCD is better for batteries. If it MUST be LED, running off the power company would easily provide the accuracy by simply counting the cycles of the AC. Mine runs great and certainly meets the accuracy spec.

GG

days

That is about 1ppm (part per million) accuracy. The only way that I know to achieve that sort of accuracy is to use either a GPS module or a reference to WWV. Most crystals will only give you a accuracy between

20-50ppm.

The DS4000 TCXO does 1ppm

Dave :)

The DS32KHz is cheaper and almost as good and comes in SO package:

This is the one I meant in the first place, sorry, I thought they had changed the part number or something.

Dave :)

or a

between

Well looky there. Only $18 in thousand lots. ;-) Still cheaper and more convenient (not counting that BGA packaging) than a GPS module, pretty slick.