Hello, I need a little help on a timer project that I am struggling with (see att.)
I have a 555 giving out a 1Hz clock feeding a 4017 with outputs on 8,9,10 (seconds). I was hoping to trigger a second 4017b from these sequential Q outputs on 4017 no 1. The output from the second 4017 will be on Q4 thru 9 and both 4017 (1) and (2) will feed the A and B input of an AND gate.
I was hoping the arrangement will give me an Output on 18,19,20 seconds and 28,29,30 seconds to be then repeated (probably by a third 4017 x amount of times).
There is no issue with my use of the first 4017 but I cant understand why I cannot trigger a second 4017 from the output (8,9,10) of the first 4017.
Any help demystifying would be gratefully received. Sorry for the incomplete 'schematic' its more a working (or non working) drawing!
Am I barking, up the wrong tree; or both?
Thanks.
I have a 555 giving out a 1Hz clock feeding a 4017 with outputs on 8,9,10 (seconds). I was hoping to trigger a second 4017b from these sequential Q outputs on 4017 no 1. The output from the second 4017 will be on Q4 thru 9 and both 4017 (1) and (2) will feed the A and B input of an AND gate.
I was hoping the arrangement will give me an Output on 18,19,20 seconds and 28,29,30 seconds to be then repeated (probably by a third 4017 x amount of times).
There is no issue with my use of the first 4017 but I cant understand why I cannot trigger a second 4017 from the output (8,9,10) of the first 4017.
Any help demystifying would be gratefully received. Sorry for the incomplete 'schematic' its more a working (or non working) drawing!
Am I barking, up the wrong tree; or both?
Thanks.
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