Digital Clock Circuit Design

[Lance]

Can anyone point me to a website which highlights a Digital Clock Circuit
design using 7400 TTL series chips?


I plan to have 'hours', 'minutes', and 'seconds' on this clock.



Thanks,

Lance

 

[Lord Garth]

"Lance" <Lance@nospam.com> wrote in message
news:4f8a7a3028610742570ab01c5acdfe0f@news.teranews.com...

Can anyone point me to a website which highlights a Digital Clock Circuit
design using 7400 TTL series chips?


I plan to have 'hours', 'minutes', and 'seconds' on this clock.

Steve has one on www.armory.com

 

[Watson A.Name - "Watt Sun]

In article <DcNrb.2274$WS6.312@newssvr24.news.prodigy.com>,
LGarth@Tantalus.net mentioned...

"Lance" <Lance@nospam.com> wrote in message
news:4f8a7a3028610742570ab01c5acdfe0f@news.teranews.com...

Can anyone point me to a website which highlights a Digital Clock Circuit
design using 7400 TTL series chips?


I plan to have 'hours', 'minutes', and 'seconds' on this clock.

Steve has one on www.armory.com

Sounds a lot like a homework problem.

I'm gonna post a schem of a clock from an old (1976) Radio Scrap flyer
that was on the back of a 7-Seg LED package. Check ABSE for the
picture.


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[Julius Caesar]

Lance wrote:

Can anyone point me to a website which highlights a Digital Clock Circuit
design using 7400 TTL series chips?


I plan to have 'hours', 'minutes', and 'seconds' on this clock.



Thanks,

Lance


Man, it's so easy to build one... Use the 4511 (counter + latch), and a

few of logical gates will help you to increase minutes after 60 seconds,
etc...

JC

 

[Bill Bowden]

"Lance" <Lance@nospam.com> wrote in message news:<4f8a7a3028610742570ab01c5acdfe0f@news.teranews.com>...

Can anyone point me to a website which highlights a Digital Clock Circuit
design using 7400 TTL series chips?


I plan to have 'hours', 'minutes', and 'seconds' on this clock.



Thanks,

Lance

There is a digital clock using the newer 74HC parts here:

http://ourworld.compuserve.com/homepages/Bill_Bowden/dclock.htm

The basic clock uses 7 ICs and the display uses another 5.
Two of the display digits are multiplexed for minutes or
seconds so you only need 4 digits for hours, minutes and seconds.

-Bill