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Subject: Logic design for setting the time in a 12hr digital clock

Date: 12/14/02 at 10:45 PM
Posted by: Imdad Saiyed
E-mail: imdadsaiyed2000@yahoo.com
Message Posted:

Hi, I've designed a 12hr digital clock for my final project. I've used 7493 counters for the seconds and minutes section of the design and a 74192 counter for the hour section, the 74192 is a presettable counter. I've also used the 555 timer to generate the 60hz signal and divided it by 60 to get the 1hz/sec signal. Every thing works fine the clock itself works just fine but I just can't design the circuit that'll let me set the correct starting time. so, my question is that I really, really need a circuit design using some gates and pushbutton switches that'll let me set the time both the minutes and the hours. I will really appreciate it if someone can mail me this circuit. Any kind of help will be greatly appreciated. Thank you very much!

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