Help with USB hub and USB sound card

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correia5022
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Re: Help with USB hub and USB sound card

Post by correia5022 » Sun Jan 13, 2019 5:37 pm

rodocop wrote:
Sat Jan 12, 2019 5:57 pm
I've used those power supplies before. They work okay. What i found, and can be seen in the product description and pics, you need to trigger the key pad to turn on the output. So I put a tactile switch between key and ground. Press the button, then the output turn on.

Not ideal, but I bought a bunch of those too to test, and ended up using them all.
I tried that also, but it wont turn on. The output voltage stays below 2v.. probably fake pcb's?

EDIT: Also, when you add 5v to the input, it should give 4.2 in battery terminals, but it wont.. gives 4.6V, sometimes 5v
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Re: Help with USB hub and USB sound card

Post by tinkerBOY » Sun Jan 13, 2019 6:09 pm

correia5022 wrote:
Sun Jan 13, 2019 5:37 pm
rodocop wrote:
Sat Jan 12, 2019 5:57 pm
I've used those power supplies before. They work okay. What i found, and can be seen in the product description and pics, you need to trigger the key pad to turn on the output. So I put a tactile switch between key and ground. Press the button, then the output turn on.

Not ideal, but I bought a bunch of those too to test, and ended up using them all.
I tried that also, but it wont turn on. The output voltage stays below 2v.. probably fake pcb's?

EDIT: Also, when you add 5v to the input, it should give 4.2 in battery terminals, but it wont.. gives 4.6V, sometimes 5v
I bought a couple of those too about some months ago and they never work well.
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Re: Help with USB hub and USB sound card

Post by correia5022 » Mon Jan 14, 2019 3:43 pm

Guys, i think i know why those USB hubs are not working.
At a close inspection, the pcb's don't have a component near the chip, although being a different chip:
differenceShow
Image
I was searching and i think is a crystal? To keep usb sync? Could it be?
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Re: Help with USB hub and USB sound card

Post by tinkerBOY » Mon Jan 14, 2019 11:45 pm

correia5022 wrote:
Mon Jan 14, 2019 3:43 pm
Guys, i think i know why those USB hubs are not working.
At a close inspection, the pcb's don't have a component near the chip, although being a different chip:
differenceShow
Image
I was searching and i think is a crystal? To keep usb sync? Could it be?
That's weird. Can you take a closer shot of the chip so I can search the datasheet?
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Re: Help with USB hub and USB sound card

Post by correia5022 » Tue Jan 15, 2019 9:01 am

here it is.
Its a HS8836 IPU27003.1
chipShow
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Was i correct or not? Is missing the crystal
crystalShow
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Re: Help with USB hub and USB sound card

Post by correia5022 » Tue Jan 15, 2019 9:07 am

LOL, its a fake chip, isnt it suposed to have 28 pins instead of only 16?
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Re: Help with USB hub and USB sound card

Post by correia5022 » Wed Jan 16, 2019 5:33 pm

tinkerBOY wrote:
Mon Jan 14, 2019 11:45 pm
That's weird. Can you take a closer shot of the chip so I can search the datasheet?
Hey tinkerboy.
Any idea from the chip's specs?
Can it be fake? But it's still anoying me why it works in windows...
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Re: Help with USB hub and USB sound card

Post by tinkerBOY » Wed Jan 16, 2019 5:40 pm

correia5022 wrote:
Wed Jan 16, 2019 5:33 pm
tinkerBOY wrote:
Mon Jan 14, 2019 11:45 pm
That's weird. Can you take a closer shot of the chip so I can search the datasheet?
Hey tinkerboy.
Any idea from the chip's specs?
Can it be fake? But it's still anoying me why it works in windows...
I couldn't find any proper datasheet of it. Like I said if it works on Windows then its probably not compatible with RetroPie/Raspbian.

Send me one so I can test it myself. :)
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Re: Help with USB hub and USB sound card

Post by correia5022 » Wed Jan 16, 2019 6:00 pm

tinkerBOY wrote:
Wed Jan 16, 2019 5:40 pm

I couldn't find any proper datasheet of it. Like I said if it works on Windows then its probably not compatible with RetroPie/Raspbian.

Send me one so I can test it myself. :)
Yeah the datasheet i got is of a 28pin IC, but my Hub has 16..
https://cdn-shop.adafruit.com/product-f ... .+1.0).pdf

I would gladly send you one, just pm me. I'm waiting for one of your boards, so its just a matter of reply to you after.. :)
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Re: Help with USB hub and USB sound card

Post by correia5022 » Sat Feb 09, 2019 8:08 am

Ok, so a word of caution: If you are looking for USB HUBs, all of them coming from aliexpress will not work.

I ordered a bunch, from different sellers, of those that suposedly worked for me (i had links in previous post).
So what i understand is that new versions come with the same odd chip that those black ones have, which dont work with rpi0
https://pt.aliexpress.com/item/Led-de-a ... b90aXjmEAk
https://pt.aliexpress.com/item/Kebidu-H ... b90a5HIeie
https://pt.aliexpress.com/item/Kebidu-A ... b90a9CKTtG
https://pt.aliexpress.com/item/Kebidu-4 ... b90a9CKTtG
insideShow
Image
Image
Also different ones that dont work
https://pt.aliexpress.com/item/OTG-3-4- ... b90aqMNvi0
https://pt.aliexpress.com/item/Boneca-M ... b90aXjmEAk
https://pt.aliexpress.com/item/High-Spe ... b90aXjmEAk
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