In my projects with flip flops I notice my led's have tiny off's or on's that are out of rythm with the function or counting of my circuit. I set my
555 astable to about 1 herz so I can visually watch the sequencing of my led's and my O'scope shows a very nice clean rythmic square wave. My circuits are simple with two chips, both dual flip-flops and some led's. Now I'm trying circuits with counters, for example a 74LS90 and some led's and I'm noticing the same tiny "flickers" out of rythm. I read about rising-falling edges as triggers, might this be a factor on what I'm seeing?Any help is appreciated, Bart