Cool Ideas
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I/O LEDs
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A B C 1 2 3 4 5 6
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0 0 0 0 0 0 0 0 0
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0 1 Z 1 0 0 0 0 0
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1 0 Z 0 1 0 0 0 0
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Z 0 1 0 0 1 0 0 0
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Z 1 0 0 0 0 1 0 0
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0 Z 1 0 0 0 0 1 0
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1 Z 0 0 0 0 0 0 1
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0 0 1 0 0 1 0 1 0
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0 1 0 1 0 1 0 0 0
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0 1 1 1 0 0 0 1 0
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1 0 0 0 1 0 0 0 1
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1 0 1 0 1 1 0 0 0
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1 1 0 0 0 0 1 0 1
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1 1 1 0 0 0 0 0 0
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6 LEDs off only three pins!
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