Topic: >>10 port powered USB 2.0 hub $14.99 + A Very good selection of USB Hubs for BTC (Read 7171 times)

What could happen if I don't scrub the connection? I've done the +5v mod to all ports and the hub will work for a couple of hours but then it'll drop out and the block erupters stop mining. The only way to fix it is by unplugging the hub from the PCs USB port and plugging it in again. Could this be caused by not scrubbing the connection?
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you need to scrub it or cut the red wire on your usb cable.
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Sorry to ask, but, what if I scrub and solder the right diode in there?
What kind of diode (rating, voltage, etc) do you think it should be ok?

BTW, I don't have that that Capacitor near the power plug... What's his ratting?

Thank you!

shameless bump 

If anyone has a specific hub or piece of networking equipment they are looking for please PM me the manufacture and model number and I will see if my supplier has it.

I just put up some networking equipment for those that have asic blades.

$28.99WD My Net Switch - 8 Port Gigabit Network Switch
https://www.bitmit.net/en/item/67822-wd-my-net-switch-8-port-gigabit-network-switch-free-2-day-ship


$24.99TP-LINK TL-SG1005D 5-Port Gigabit Switch
https://www.bitmit.net/en/item/67820-tp-link-tl-sg1005d-5-port-gigabit-switch-free-2-day-shipping


$17.99Black 100FT CAT6 Network Cable
https://www.bitmit.net/en/item/67816-black-100ft-cat6-cat-6-rj45-network-cable-100-free-shipping


$9.99Blue 50FT Cat6 Network Cable
https://www.bitmit.net/en/item/67815-50-foot-50-cat6-rj45-network-ethernet-lan-cable-blue-free-ship


$16.995-Pack 5ft Cat6 Snagless Ethernet Cable
https://www.bitmit.net/en/item/67818-5-pack-cat6-snagless-ethernet-cable-free-2-day-shipping

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What could happen if I don't scrub the connection? I've done the +5v mod to all ports and the hub will work for a couple of hours but then it'll drop out and the block erupters stop mining. The only way to fix it is by unplugging the hub from the PCs USB port and plugging it in again. Could this be caused by not scrubbing the connection?
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you need to scrub it or cut the red wire on your usb cable.

I use the Anker hubs with a Jally connector from Cablez (do a user search), plugged into a PCI-E connector. Seems overkill, but I have no problem with it, and it will provide power for 10 block erupters easily. No need to worry about some crap powerbrick not providing enough power for you. You can run multiple hubs off a PCI-E connector with splitters.

What could happen if I don't scrub the connection? I've done the +5v mod to all ports and the hub will work for a couple of hours but then it'll drop out and the block erupters stop mining. The only way to fix it is by unplugging the hub from the PCs USB port and plugging it in again. Could this be caused by not scrubbing the connection?

The Rosewill RHB-500 usb hub is back in stock. There was a small price increase to account for my supplier raising their price. If/when my supplier lowers the price I will lower my price.

$28.99Rosewill 10-Port USB 2.0 Hub RHB-500 5v 4a
https://www.bitmit.net/en/item/66773-rosewill-10-port-usb-2-0-hub-rhb-500-5v4a-free-2-day-ship-asic

Yes, price is the same. They ship directly from my supplier so I can't really get them without the power adapters.

Maybe we can start this as another topic for modding the USB hub. lol
Meanwhile back to topic, can I get 2 hubs without adapters? The price is the same?

Yes thats right, its to prevent feeback. close the loop
HUB will not power on its own after this.

not both, one or the other.

As it happens I have the same hub, I removed the power supply from its cable and soldered in a molex to ground and +5v. No issues plugging the molex into my machines PSU and the hub into the PC. I can run 10 BE's for an hour or so but then they'll drop out.

Next up I'll try mijanur's suggestion to solder cable to the +5v line, but I don't understand the need to solder the ground and scrub the connection. Is this to stop power from the +5v line going back through the PC's USB port? Wouldn't I have seen the result of this after it being plugged in for days? Also, wouldn't this mean without any mods, the power from the external power supply would be going back through the computers USB port?

So connect all the +5v with a wire and do the same on the ground side?

Thank you for the guide on how to do it. I'm always itching for a reason to open up something and tinker with it. I will prolly do this mod to mine soon.

The pcb on these boards are too thin..

heres what i have been advised by a member here "solidbitshop"

You have to make some soldering.
The 5V line on PCB is too thin and only on one side. It will lead to massive heat on the PCB it will burn or melt causing massive surcharges, and many other bad things.

PS> I suggest desoldering the power connector from PCB you will have room for a wire and can close it in case. Tear one of the plastic thingy that go trough hole on PCB and that way you will have a hole to put wire trought.

You have to solder a wire to red circles (on the photos) that would be +5V, and another one GND(0) to the black ones (either will work)
As You can see there is no diode Y4 preventing power to go back to PC, and the circuit connecting it is solid, You will have to scrub this thin CU layer in brown line, after You do that check with multimeter if there is any connection left.

Once You solder the wire, put a mulimeter (current meter) in it and check what is the current of powered device. If its no more than 500mA - 1A you are good to go. Plug in some Erupters and check the current with all 10. It should be arround 6A of current when plugged 10 devices.

Leave it for some time to see if everything is ok, take out multimeter from it and connect it direclty to PSU.

Now check the Voltage on USB port. Its better to do when you connect all 30 of them.
Connect them to PSU turn them on, now put one prope to a +5V on the errupter USB the other one to its cover.
If its more than 4.5 You are good to go, if no adjust PSU to more than 5 V (5.5V is max I think on the PSU) so the eruptors are close to 5V.




these psu should replace those excess plugs
http://www.amazon.co.uk/Switching-Power-Supply-Transformer-Driver/dp/B008DFBIYQ/ref=sr_1_2?ie=UTF8&qid=1380488192&sr=8-2&keywords=220V+DC+12V+5A or something similar

The Rosewill hubs are currently out of stock but I have some new 10 port hubs at that price point. The Rosewill hubs should be back in stock soon.

Good to hear 

I contacted Rosewill. They are sending out a replacement power supply. Thanks for your help.

I can set up an exchange with my drop shipper if you would like. PM me for details.