>>10 port powered USB 2.0 hub $14.99 + A Very good selection of USB Hubs for BTC

[Dwayne7]

Ordered some Rosewill hubs from you on Bitmit. Can't wait to get them. 

[1715027935]

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[1715027935]

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[bbxx]

Ordered some Rosewill hubs from you on Bitmit. Can't wait to get them. 

Here is my rig
They are looking great with Arctic fan, stacked.
I am looking to sell them, i have 3 spare or more.

https://bitcointalk.org/index.php?topic=296414.0

still selling, only one left

[hendo420]

Ordered some Rosewill hubs from you on Bitmit. Can't wait to get them. 

Thank you for the order. If you have any problems just let me know. 

[ElitePork]

Tried 4A adapter with them and the adapter melted. 4A adapter cost about 17.5 USD

Then I got 8A adapter to use with them and the DC connector on the USB hub melted... 8A adapter cost about 26.20 USD

[hendo420]

how does the adapter melt? There would have to be a dead short for that to happen and then I'm amazed you didn't just trip the power strip b4 it melted.

Just to be clear, you haven't ordered anything from me. None of the $14.99 hubs have even been delivered yet. lol

[ElitePork]

Yup. I did not buy any from you. I got the USB hub from a local electronic store and "sometimes" it comes with 1A adapter. Sometimes it doesn't.

The store that sells the 4A adapter "BS" me saying I turn it on 24/7. Saying it's not supported to use 24/7. Lucky it's a lady or i'm gonna give her a piece of my mind.
So I asked for a higher amp adapter and they gave me 8A.
Plug in 7 OCBE and the DC connector melted.

Final form,

Though I have some re-arrangement with the BEs. But all 4 hubs are running with 8A 5V adapters

[hendo420]

Yup. I did not buy any from you. I got the USB hub from a local electronic store and "sometimes" it comes with 1A adapter. Sometimes it doesn't.

The store that sells the 4A adapter "BS" me saying I turn it on 24/7. Saying it's not supported to use 24/7. Lucky it's a lady or i'm gonna give her a piece of my mind.
So I asked for a higher amp adapter and they gave me 8A.
Plug in 7 OCBE and the DC connector melted.

Final form,
http://i42.tinypic.com/xlgi8y.jpg
Though I have some re-arrangement with the BEs. But all 4 hubs are running with 8A 5V adapters

Its good to know that I was right about using a beefier power supply.
I'm sorry to hear that you melted one, I'm betting that hub had a dead short inside.

[hendo420]

The one I ordered for myself came in today.

The psu says 1,000ma which is 1amp, yet its running 4 usb asics just beautifully, I haven't tried 5+ yet as I have the rest hooked up in my Old Trunk rig, I'll stress test it for the next 12 hours or so with 4 then add another one and see how it does.

Ok, just tried 5 and no, 5 on the stock power adapter is a no go. lol

It does 4 just fine, I will update this thread if I notice any issues during burn in.

$14.99 is still good for a hub that will run 4 usb asics stock. It just needs a $8-10 upgrade to a bigger psu to handle more usb asics as ElitePork demonstrated earlier in this thread.

[pontiacg5]

Does the hub work at all if you plug it into the host port without using the wall-wart power adapter?

Some of these hubs will steal some host port power and supplement it with the wall-wart supply. You can tell yours is like this if it functions at all without the wall-wart. That would explain why it runs 4, kinda...

[hendo420]

Does the hub work at all if you plug it into the host port without using the wall-wart power adapter?

Some of these hubs will steal some host port power and supplement it with the wall-wart supply. You can tell yours is like this if it functions at all without the wall-wart. That would explain why it runs 4, kinda...

I havnt tried that yet personally but I believe it allows you to run it without the power supply. You are probably right about it robbing some power from the usb port.

Has anyone made adapters to run hubs off of an old computer power supply? Like 12v to 5v converters. I know you can take 5v right off of a computer psu but I'm thinking of ways to hook these hubs up to my Litecoin mining rigs without chopping wires. lol

Something like this. (12v - 5v3a 15w dc/dc converter)
http://www.alibaba.com/product-gs/1265119511/DC_DC_Converter_12V_Step_down.html

I can sell those for between $10-12 depending on what supplier I go through. If anyone has an interest in them please let me know.

[ElitePork]

Erm, just to clarify, the 4A and 8A adapter cost 17-26USD itself and it's sold separately.

I personally did a test on stock BE. If running on 1 stock BE on a laptop, it uses 90mA. When I load the 2nd stock BE, it becomes 240mA. So it takes about 150mA for a stock BE that is in mining state. A USB 3.0 port will not power more than 1 OCBE (to 448MHz, and i havent try stock BE).

The next thing I wanna try is to use switching power supply 5V 60A to power 3 of these hubs. and see what happen lol (hopefully no explosion)

Back to topic, this hub sells 15SGD cheapest here. Yours is 3SGD more but with delivery. But when I need it, it really means i needs it now. haha.

[hendo420]

Almost 24 hour stress test and still working just fine. These $14.99 hubs handle 4 usb asics.

I think I would still recommend getting the Rosewill if you have the extra $10 since they can handle 10 usb asics out of the box. Only $25.99 in my bitmit store.
https://www.bitmit.net/en/item/63466-rosewill-10-port-usb-2-0-hub-rhb-500-5v4a-free-2-day-ship-asic

[Dwayne7]

Almost 24 hour stress test and still working just fine. These $14.99 hubs handle 4 usb asics.

I think I would still recommend getting the Rosewill if you have the extra $10 since they can handle 10 usb asics out of the box. Only $25.99 in my bitmit store.
https://www.bitmit.net/en/item/63466-rosewill-10-port-usb-2-0-hub-rhb-500-5v4a-free-2-day-ship-asic

Just got my Rosewill hubs. I'm running 8 on each. I tried 10 miners but it was a no go. I can do 8 with a fan and 9 with an external fan.

[Dwayne7]

I just jinxed myself. One of the power supplies just died for the Rosewill 10-Port hub. I only had 8 miners plugged into it. It died in less than 8 hours.

[hendo420]

I just jinxed myself. One of the power supplies just died for the Rosewill 10-Port hub. I only had 8 miners plugged into it. It died in less than 8 hours.

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

[Dwayne7]

I just jinxed myself. One of the power supplies just died for the Rosewill 10-Port hub. I only had 8 miners plugged into it. It died in less than 8 hours.

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

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

[hendo420]

I just jinxed myself. One of the power supplies just died for the Rosewill 10-Port hub. I only had 8 miners plugged into it. It died in less than 8 hours.

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

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

Good to hear 

[hendo420]

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.

[mijanur]

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

[hendo420]

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.

https://i.imgur.com/YFWMMIi.jpg?1?7362
https://i.imgur.com/F8UXopi.jpg?1

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

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.