USB Stuff

[der Mouse]

>> [...] a motorized USB "Aquarium" [...]
> Whule I can see the point of taking power from the computer for an
> interface converter, keyboard, mouse, something like that, wouldn't
> it be simpler if devices like the aquarium, light, etc had their own
> mains adapters?

Yes, but it would tie them to the mains.

> Or is a computer now regarded as simpler than a 5V PSU?

Not simpler, but in a lot of cases more portable.

You may not use laptops enough to think of them, but there are a lot of
people who border on attached at the hip to theirs.  They may not have
a mains outlet handy, but they *always* have a powered USB port handy.

That doesn't describe you, I assume; it doesn't describe me either.  We
aren't part of the target market for that thing....

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