Need Help with counters!!!Please

Thread Starter

kjs_123

Joined Oct 16, 2008
22
How to Design two decade counters that are cascaded to produce an output from 00 to 99 on 8 digital outputs. Also to Arrange an input that can stop the count when brought low – use a switch on the development board for this purpose. Drive this design from your 1 Hz source.


Any Suggestion would be helpfull....


Thanks
KJ
 

beenthere

Joined Apr 20, 2004
15,808
Page 9 of the datasheet shows how to arrange a BCD counter. Just ignore the parallel load logic. Pay attention to how the logic stops the count at 9 rather than F.

If you can't use a counter IC, then you can use standard logic to duplicate the function.
 

beenthere

Joined Apr 20, 2004
15,808
The idea is that ANDing the outputs for '9' and the clock take the state back to 0. For the next stage, the previous state of '9' and a clock should advance the count.
 
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