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

[Benjamin Tompkins]

This hub can be powered via a USB power bank if you need.

https://www.amazon.com/ORICO-Powered-4-Ports-Ultra-Slim-Extended/dp/B07Y6H8ZRM/ref=mp_s_a_1_32_sspa?keywords=orico+4+port+usb+3.0+hub&qid=1572369316&sprefix=orico+4+po&sr=8-32-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyQVAwMFpDVE9GRFNWJmVuY3J5cHRlZElkPUEwMzMxMjYwM09DTVAxMFVZNUw1RyZlbmNyeXB0ZWRBZElkPUEwOTg1MjgyMk5SOUtQVE44UExSUyZ3aWRnZXROYW1lPXNwX3Bob25lX3NlYXJjaF9idGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

There's a micro usb on the side for aux power in.

On Tue., Oct. 29, 2019, 1:00 p.m. Khalid Baheyeldin, <kb at 2bits.com> wrote:

> On Tue, Oct 29, 2019 at 12:56 PM Benjamin Tompkins <bjtompkins at gmail.com>
> wrote:
>
>> You may be better off skipping the hub and looking for an extension cable
>> and putting the joint where the bend is.
>>
>
> The hub reduces the two cables from the two cameras on the telescope
> optical tube, to just one going to the laptop (instead of the current two.
>
> Will try that after I measure the current.
>
> As for the passive hub, USB 2.0 specifies a max amperage of 500mA.  It
>> should provide that to a single port if that's all that is in use.
>>
>
> Thanks for this info. Gives me a baseline to measure.
>
> The USB cable for the one camera is both power and data, and for the other
> camera is only data.
>
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