*Notice, details found, will be listed down below this post.*
====== Original Post ======
Okay, so I've been thinking about trying one of those USB Flash drive Raid setup.
So right now I have this little number.
http://imgur.com/a/AFJbTBy looking at this I am thinking of installing a number of capacitors, but since my skills are really limited, I understand I am going to need both through-hole and SMD.
Also soldering the tabs on each USB connector, would be a good idea?
And as for a power supply, what plug size do I need, and yes I think I will be using a 7805 before between the hub and the power brick.
And I would like to install a LED for the power, I still need to test the voltage level.
====== Original Post End ======
====== Theory ======
First off, after attaching this to my Linux PC, I found it reported mt USB HUB back as a
D-Link DUB-H4 and another company called
Genesys logic, Inc-----------------------
Now second, on this USB HUB, I have found were I can install a 'ON/Powered LED' but since I found it was outputting 4.8v, to attach a red LED, I will need to add a 310ohm resistor, if you plan on using another color LED, you will need another resistor value.
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In that case you can just solder 0.1 uF caps for both SMD and through-hole. But that change won't have any visible changes.
Solder the tabs and place the through hole capacitors. 10uF 16V are probably about the best fit there, high enough value to do something and low enough that they total less than the maximum allowed for a USB hub.
Third, as you can see above, ataradov recommends a 0.1 uF capacitors, for both the through-hole and surface mount, while SeanB has recommends 10uF 16V capacitors for both.
I think they are both right, however I would use 10uF 16V capacitors for the through-hole and 0.1 uF capacitors for the surface mount.
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For frothed, because of the really crappy USB cable, I plan to take it off and replace it with another one. I now have an old ZTE phone and data cable, that I found and will be soldering that to my USB HUB, in includes a ferrite core, keeping the cable from pilling out, is going to be another challenge.
I have a couple of those, they are all-right as far as cheap hubs go, I'd be surprised if adding the missing caps would make any difference unless you are seeing some particular problem.
I modded one by putting a standard 5.5/2.1 jack in the top and tucked a miniature buck converter inside so I could plug in any old random 5v+ supply, instead of the silly mini barrel jack it has (which I suspect might be the very old nokia phone size?).
Also, sleemanj has posted his power mod, and recommends an old Nokia power plug might fit, sadly the in inner barrel is too small, howeverfor the over all barrel size, it is.
That is an unsatisfactory way to solve the problem, as it will almost guarantee your hub violates USB spec when bus-powered.
Monkeh has pointed out that a 3/3.5A power adapter should cover most things, and my toss in the air of 6A is a tad on the over kill side.
Still I am worried about voltage feedback over the USB cable, back into the PC and think something like what is shown on the bottom of this Pi Wiki post, would be needed as a mod.
http://elinux.org/RPi_Powered_USB_Hubs It would mean that I could not only power my Pi2, but also have it running a Flash drive Raid plus a nice beefy Wifi card.
====== Theory End ======
Okay, so I felt like giving this a test and I have to say, it was rather depressing.
Pictures times, and the Application used is called Speedout
https://sites.google.com/site/mbentefor/projecs-speedoutPlease note I used the same SanDisk 16 GB USB 3.0 Flash drive for all tests and in the same USB port on my laptop.
This was the test of the flash drive, plugged into the USB port on my laptop:
Now this test is through the
first USB port on the USB HUB:
This is on USB Port seven on the USB Hub:
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Now the following two are after I replaced the USB cable, something much better. WAY better.
USB Hub Port one:
USB Port Seven:
To start with I knew this was a peace of junk, but I will say this... I had no clue it was this bad, so warning. These are being sold in Australia.
While trying to replace the USB cable, I lifted both the Data + and Data - solder point. While I did manage to save it....
Yea, after this it is going in the bin.
So that is me done, with for the luck of me only wasting, just shy of $4 .
Plus, I have seen these being sold in Australia. Ah the Fun.