[kwlug-disc] Strange poweron problem

[B.S.]

Remind us ... what are / were you trying to run off the hub?

(Did you put a volt meter on it? What did it report?)


On 10/09/2016 08:38 AM, CrankyOldBugger wrote:
> I agree with you, William, about not powering all the ports at the same
> time.  I suspect that's the issue with the 7-port hub that I'm trying to
> replace here...
>
>
> On Sun, 9 Oct 2016 at 02:18 B. S. <bs27975 at gmail.com> wrote:
>
>> On 10/09/2016 01:11 AM, William Park via kwlug-disc wrote:
>>> On Thu, Sep 29, 2016 at 12:01:52PM -0400, Andrew Kohlsmith (mailing
>> lists account) wrote:
>>>>> On Sep 29, 2016, at 11:58 AM, CrankyOldBugger <
>> crankyoldbugger at gmail.com> wrote:
>>>>> I've bought a couple of Anker 4 port hubs to replace that 7 port
>>>>> job.  I'm kind of sad that I'll be losing the power switches on each
>>>>> port but if the hub is failing then there's not much else I can do.
>>>>
>>>> I really like the Orico USB2 and USB3 hubs I got from Canada
>>>> Computers. Haven???t taken one apart yet but they look good, some have
>>>> power switches for the ports, and have decent quality power supplies
>>>> and (in the case of USB3) high-current charging ports.
>>>
>>> +1.
>>>
>>> I bought Orico USB2 10-port hub, because it came with power supply (36W)
>>> sufficient to power all 10 ports all occupied (25W).  Other hubs cannot
>>> power all their ports at the same time, which is scam really.
>>
>> Check me on this ...
>>
>> Such means USB length is essentially infinite? IIRC, USB max. is 30',
>> unless (powered) signal repeated - such as by these, daisy chained, even?
>>
>> Still limited to the max. bandwidth when it finally enters the computer,
>> but this issue diminishes with USB 3, especially as hubs going outwards
>> are also USB 3. i.e. If really far away, first hub or more could be USB
>> 2, as long as accumulation of such USB 2 hubs into the first USB 3 hub
>> doesn't exceed USB 3 bandwidth.
>>
>> [This matters as I have zoneminder set up, with USB cameras - far
>> cheaper / perhaps more effective, than IP cameras). USB length becomes
>> an issue. {Even a 486 handled 5 such cameras at 320 pixels, greyscale.}
>> Was fostering a feral cat at the time, and needed to see when he came
>> out from under the sofa so he could be socialized. Limited camera field
>> of view is annoying!]
>>
>> And by going in to different (non-shared) ports into the computer, one
>> could presumably have a star of multiple chains of USB devices in all
>> direction and far longer than the 30' USB spec. As long as there's a
>> wall socket to power the hubs along the way. Unless I'm misunderstanding
>> something?
>>
>>
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>>
>
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