Hello,
I builted a ttl digital clock, using 7490's, 7492's, and 7447. Its a 24 hour clock and works great. The only problem i am having is with the set switches. My first switch to turn the frequency , which is 1 hz, on and off to the clock works fine. The second switch is connected to the 1hz and the output is connected to the minutes 7490 Qa. The third switch is connected to the 1hz and the output is connected to the hour 7490 Qa. The minute switch when turned on will count to 5 the go to zero and then stay on zero. The hour switch will count to 3 go to zero then stay on zero. Will a capacitor help this problem,i haven't tried this yet.
I builted a ttl digital clock, using 7490's, 7492's, and 7447. Its a 24 hour clock and works great. The only problem i am having is with the set switches. My first switch to turn the frequency , which is 1 hz, on and off to the clock works fine. The second switch is connected to the 1hz and the output is connected to the minutes 7490 Qa. The third switch is connected to the 1hz and the output is connected to the hour 7490 Qa. The minute switch when turned on will count to 5 the go to zero and then stay on zero. The hour switch will count to 3 go to zero then stay on zero. Will a capacitor help this problem,i haven't tried this yet.