long distances data

Projects General Guidance
1

How long can a cable be depending on its application and which kind of cable is apropiate to use?

For example:

-the cable that connects a LDR to an analog input
-the cable that connects a digital pin to a digital pin in a second board

thanks!

2

Depends on a lot of factors, like current, electromagnetic interference, speed of signal transitions, etc.

3

Line drivers can be used to extend the distance

4

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5

and in case you use RS485, what cable is appropiate?

6

Try a Google search on;

'cable for rs485'

7

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8

thanks you very much @spycatcher2k for your answer

9

Choose your pairs !

10

lastchancename:
Choose your pairs !

what does this mean?