Another (simple) wiring question

[darryl]

Looking at this (excellent) howto: http://www.hobby-boards.com/catalog/howto_..._connecting.php

I have this simple question:

When providing +5vdc to a 1-wire device which ground do you use? I'm assuming it should be the white/green ?

 

[ericvic]

Darryl,

That is correct, but you can use any of the grounds, except white/blue. In most of our devices all the grounds are tied together because the 1-Wire chips don't have a separate data ground and power ground. But any of our devices supplying the power, like the Power Injector, or Hub, the 1-Wire ground (white/blue) is not tied to the other grounds since the 1-Wire network doesn't like power ground flowing through the same wire as the data ground.

Hope that makes sense.

Eric

 

[darryl]

Ah, that explains that when I tied to white/blue initially it didn't work! Thanks!

 

[huggy59]

Just curious, ericvic - why did you guys choose T568A? Most wiring installers using Cat5e use T568B, as do network patch cables.

 

[ericvic]

I decided to follow the proposed RJ45 1-Wire standard that can be found here.

Eric

 

[stormer]

If you have T568B patch cables, use them. My house is wired based on T568B standard so I'm using that standard for my 1-wire devices too, just to keep it simple

Unfortunately that means I don't have a 1WRJ45 house ;(

Niclas