Olin Lathrop wrote:

> Even 24V would be pusing it with a linear regulator.  Only 53mA is 1W
> dissipation in a linear regulator dropping 24V to 5V.  If you're going to
> use linear regulators anyway, then higher voltage will only make things
> worse.  You don't get the extra power carrying capacity of the wire and burn
> up a lot more power in heat in the modules.

Yep, this is the point: my compromise, with current parts, between the 
LDO (and cable) power waste, and the possibility to power 24V devices 
here and there.

-- 
Ciao, Dario
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