Olin Lathrop wrote:

> However let's keep in perspective the original question was what voltage
> Dario should bus around his house to power a few distributed devices.

Hi guys, I'm glad this lead to such an interesting discussion between 
you :))

> Simple buck regulators that are good enough can be easily designed with 12,
> 24, or 48 volts input.  I was advocating the higher voltage to reduce [...]
 > Over time he is likely to add more and more
> devices, so designing now for more power capacity sounds like a good idea.

indeed, true.
Only thing, I find it hard to put there the buck converters at the 
moment. But it may come true later.

> [...]We may disagree on whether 48V will be less
> efficient to use than 24 or 12 volts, but in either case a few percent
> difference in the modules isn't really the issue, and would probably be more
> than offset by the cable losses anyway.  If he uses off the shelf CAT5
> cable, then it will have a maximum current carrying capacity.  At 48V that
> same cable will be able to deliver twice the power to the distributed
> collection of modules than at 24V.

Yep.
At the moment I'm considering 24V as a good intermediate value :)

-- 
Ciao, Dario
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