I am trying to get a project done tonight.... and I think I am having some kind of brain meltdown. I have 3 74HC595 shift registers... I need to be able to control 21 led's one at a time via the serial port.... I would like to use ascii characters (any range) to turn each led on and off. need to …

Help please with shift registers

nickgammon November 9, 2012, 4:57am 3

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