I have been searching for information about using long cables (6-8 meter) between a controller and a set of 595 shift registers, but have not found any info.
I'm currently testing a 6 meter cable (4 x 2 twisted pairs) and it it work most of the time. Each time I update the 595's I start with clearing the them (^SRCLR).
What I want to know if I need pull-ups and/or pull-down resistors on the input pins on the 595? And if yes, what is the guidelines for choosing the proper resistor value?