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This instructable is meant to be a more complete explanation than others available online.
Notably, this will provide more hardware explanation than is available in the LED Marquee instructable by led555.
First off, I do not think a standard 74HC595 shift register is a good idea here because they cannot handle the kind of current we want to send through the LEDs.
This is why I chose the HEF4794 driver as it can easily sink the current present when all 8 leds are in one row are switched on.
I would rate this project to be of medium difficulty: First, I am not an electrical engineer.