Theory on making a digital clock using 555 timer

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MSRA

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i want to build a digital clock using 555 timer,4518,7447 and segments.
BUt the problem is I don't have any idea of that niether i found any appropiate schematics nor theory relating to it....:|
so anyone of you can provide me some useful thory and if posible any schematic of it.:!:


thankx in advance....


HAPPY NEW YEAR
 

Re: Digital Clock

Hi friend, Happy New Year too,

Below is a file which I uploaded for you. its a digital clock made up of discrete logic components, I think it is a sample circuit file from Proteus, Enjoy!

If you want to learn to design timers/counters, please refer to the book of Albert Malvino, Digital Priciples and Applications.


PS : dont forget to push the "Helped Me" button huh
 
Re: Digital Clock

thank u..
but believe me i have this one......and the reason i don't use it is it doesn't have second in it.
 

Re: Digital Clock

That is wery simply to make seconds indication. You connect 2 7447 and 2 LED display to U11 and U12 like displays of minutes. Timer 555 is not stable. You must use piezo cristall for frequency generator.

jj
 

Re: Digital Clock

OR... You can simply add a LED to monitor the pulse rate of the timer circuit(crystal oscillator would be prefered) and make sure the timer has 60Hz pulse, LED will blink every 1 second. Look what I did below.....
 

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