frances

i'm newbie here... hope all u guys can help me.....we were ask to build/design a digital clock that can be interchange from a normal 12hour clock to military time clock.... what will we do first? we were advice to use 7490 and 7492 ICs.... we have no idea to construct the diagram....... how will we start it......

pls help me!!!! thank you in advance!!!


godspeed everyone!!!!

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i\'m currently a 4th year bs electronics and communications engineering student. i hope we can help each other.... ciao!!!!

k7elp60

Millitary time is 24 hour time. Midnight to 12 PM is the same. 1 PM normal time becomes 1300 hours, 2PM become 1400 hours and so forth.
Minutes and Seconds remain the same.
I am not aware of any current clock chips availible to make it easier to design a build a clock. You can start off with a time base of 1 pps, divide by 60 for seconds, divide by 60 for minutes, and then divide by 24 for hours.

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The great thing about electronics is unlimited ways to do the job. The only limit is one\'s imagination. I generally think my way is best.
Show me a different way. I have an open mind.

Styx

Also they are normally referenced against "Zulu" hour or GMT

gauri_22480

hiii
my 555 is not giving me output pulses(astable)......I have connected properly.....but osciloscope is not showing pulses........nothing is wrong in connections.......I have checked everything........what should I do...........plz help.........very urgent.........already waste so many days on this.............. ops:

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gauri

Nigel Goodwin

A 555 is a very simple and reliable circuit. If it doesn't work you've either got it wired wrong or you have a faulty component - assuming you're using this as a clock generator it's not going to be a very accurate clock though!.

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PIC programmer software, and PIC Tutorials at:
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Optikon

check your circuit... don't assume anything. 99.9% chance it is wired wrong(loose connection etc..), If it is designed properly to begin with. :roll:

Can you post what you've wired?