[kwlug-disc] USB 2.0 hubs, and power ...

[Khalid Baheyeldin]

On Tue, Oct 29, 2019 at 12:06 PM Ron Singh <ronsingh149 at gmail.com> wrote:

> Khalid, I have only seen a rubberized USB A-B cable once many years ago
> attached to a robotic device.
>
> In my case, if I use a short cable and a hub, the cable does not need to
bend much, so stiffness will not be an issue anymore. The hub will be near
the pivot point where the axes intersect.

It will also simplify the cabling (one cable to the laptop instead of two).

As for a passive hub being able to power 2 devices, best to get some idea
> of the current being drawn by said devices.
>

Only one device need to be powered through USB. The other has its own power
supply.

I have a couple of in-line USB amp/voltage readers things courtesy of
> China,
>

Oh, those. I have one stashed somewhere. Will look for it and try to get a
baseline on current usage.

Once I get this, how can I be sure that the hub would be able to supply
that much?
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