Seven Segment Display Flicker Between Seconds Counter

[msin]

Hello,

I'm have trouble understanding why my seconds counter flickers to some nonnumber in between the counter. For instance, as the counter increments from 12 to 13, it flickers for a moment before reaching 13.

Why does this happen and what can I do to fix it? I have also attached the file.

[David22JRA]

Hello msin

I was seeing your circuit and I am wondering if you can use the 74LS161 4 bit counter.

http://pdf.datasheetcatalog.com/datasheets/50/338676_DS.pdf

Regards

[msin]

David,

I could, but I'm using the 4518 because those are the counters I'm using for my lab. I actually managed to breadboard the clock (hours:minutes:seconds) in lab today. The clock did not have the flickering shown in the simulation.

[David22JRA]

Hello msin

Actually that behavior is pretty weird, could you see that behavior using the real components?

Regarding with a similar configuration I attached a video that shows something similar using the 74LS161.

http://screencast.com/t/bwIFHMhLG

I made this circuit in before in one forum too. http://forums.ni.com/t5/Multisim-and-Ultiboard/multisim/td-p/3226864/page/2

If you can not see that behavior in the real components avoid that in the simulation because may that is a behavior that was corrected with the new version or in the next versions.

Regards