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[moved] A 60 Seconds Stop Watch

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goygfamily

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hi everyone, I was required to build a stop watch that would count up to 60 and then go back to 0 and start counting again. Also i had to make 2 switches one for the start/stop button another for the reset button. I have completed both the mod 60 and the start and stop button and it is working in multisim. I cant seem to get the reset button to work, when activated it is suppose to clear the counter to 00 and stay there till the start/stop button is activated. I used a mod 10 and mod 6 counter to make the mod 60 counter and also the start/stop switch and the clock is put into the and gate and connected to the clock of the 7493 to make the start/stop switch. thanks
 

betwixt

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Sounds like your reset button should also work as a stop button. Please post your schematic so we can suggest how it can be modified.

Brian.
 

hobbyckts

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Do we need to assume ourselves that you have used 555 timer ic in astable mode and you have used BCD counter and the 7 segment display to display the timervalue?
 

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