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Old 7th January 2006, 07:52 AM   (permalink)
Default schematic diagram for a digital clock...need help!

hello!! please help me with our project design.. i need an schematic diagram for a digital clock.. but we were given only 2 weeks from now to prepare.. below is the statement of the problem given to us by our instructor.

design a combinational circuit that will simulate the capacity of the digital clock to tell the current tme of the day. the design must be further more flexible enough such that it will have the capacity to be set to different time level should there be in consistencies with the displayed time and the actual time.
another design specfication is for time to be displayed in the standard format and not in the GMT (Greenwich Mean Time) format. microswitches should be employed as input transducers for the set/reset switches and the 555 astable multivibrator may be used in the generation of the 1 second clock pulse though other pulse sources are also preferable.
the second, minute, and hours parameter should be displayed, hence it follows that there should be at least six seven segment.

ill be waiting for replies..Thanks a lot.
j00ooo00an is offline  
Old 7th January 2006, 03:24 PM   (permalink)
Default Re: schematic diagram for a digital clock...need help!

Quote:
Originally Posted by j00ooo00an
hello!! please help me with our project design.. i need an schematic diagram for a digital clock.. but we were given only 2 weeks from now to prepare.. below is the statement of the problem given to us by our instructor.

design a combinational circuit that will simulate the capacity of the digital clock to tell the current tme of the day. the design must be further more flexible enough such that it will have the capacity to be set to different time level should there be in consistencies with the displayed time and the actual time.
another design specfication is for time to be displayed in the standard format and not in the GMT (Greenwich Mean Time) format. microswitches should be employed as input transducers for the set/reset switches and the 555 astable multivibrator may be used in the generation of the 1 second clock pulse though other pulse sources are also preferable.
the second, minute, and hours parameter should be displayed, hence it follows that there should be at least six seven segment.

ill be waiting for replies..Thanks a lot.
Ask your instructor for an extension, and do some searching. I gave you hints in your other digital clock post.
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mstechca is offline  
Old 7th January 2006, 09:15 PM   (permalink)
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You would learn more if you do it yorself. You won't learn much by copying a circuit designed by someone else.

Have you done a search of this forum? There have been many digital clock threads, including one that I helped someone with recently.

Edit see http://www.electro-tech-online.com/v...er=asc&start=0
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Old 7th February 2006, 09:29 PM   (permalink)
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Have you done a search for other clock designs in this forum? You could also try www.discovercircuits.com.

Here is a link to a clock circuit that does not require a microprocessor.

http://www.electro-tech-online.com/v...ic.php?t=19324

However, a microprocessor circuit will be much simpler since most of the logic and counting is done in the micro.
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