74138 ic ..NEED help, any better way to simplify this code ?


i'm trying simplify code. somehow cant correct output when use code below. outputs tested manually 1 one first combination of high , low. want use different method easier.

4 led  anode cathode
pin 15 led 1 pin 11
pin 14 led 2 pin 10
pin 13 led 3 pin 9
pin 12 led 4 pin 8







table 1 - combination
setup   1(a)   2(b)   3(c)
1   l   l   l
2   l   l   h
3   l   h   l
4   l   h   h
5   h   l   l
6   h   l   h
7   h   h   l
8   h   h   h

table 2 -  active led output
 setup   1   2   3   4   5   6   7   8
1   no   1   no   1,3   no   1,2   no   1,3,4
2   1   1   1   1,3   2,3   1,2   1,2,4   1,2,3,4
3   no   1   no   3   no   1,2,3   no   3,4
4   1,3   1,3   1   3   2,3,4   1,2,3,4   2,4   2,4
5   no   1,2   no   2,3,4   no   2   no   2,4
6   no   1,2   1,2   1,2,3,4   2   2   2,4   2,4
7   no   1,2,4   no   4   no   2,4   no   4
8   1,4   1,2,4   4   2,4   2,4   2,4   4   4

thanks help

sorry being thick , asking dumb question trying achieve other simplying code.

are trying emulate 74138 ic arduino or sending signals 74138?


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