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Author Topic: Which USB hub to use with Block Erupters | NanoFury NF1 | BPMC Red Fury | Ant U1  (Read 128274 times)
Unacceptable
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August 09, 2013, 03:51:37 AM
Last edit: August 09, 2013, 04:26:09 AM by Unacceptable
 #281

Well,my old yardsale USB hub died.So,I went to Staples & found a 7 port powered hub with 5 volt,2.6Amp A/C adpater for $42.A little pricey,but so far it works with 3 BE's,gonna try 4 in few minutes.

I'll be back with more info.It seems to work...I was in a pinch  Wink

Very similar to this,but a Staples branded one,I can't find it on thier website:

http://www.staples.com/Belkin-F4U041QFCAPL-USB-Hub-7-Ports/product_IM1PL0945

Edit: bad news,only good for 3 BE's.When theres 4 they kinda freak out & random ones don't hash at top speed  Roll Eyes


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August 09, 2013, 07:49:42 AM
 #282

http://www.amazon.co.uk/ORICO-H7928-U3-Black-Ports-Adapter/dp/B00B7Y3IP2/ref=sr_1_113?s=computers&ie=UTF8&qid=1376034239&sr=1-113
7 Ports USB3 backwards compatible. 20 VA. 7/7
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August 09, 2013, 08:03:34 AM
Last edit: August 09, 2013, 08:16:22 AM by merv77
 #283

the ports on the USB hub above look too close together, probably only good to get 4 USB erupters going.

--------------------------------------------------------

I have ordered Power supplies below and awaiting arrival from China.  
Being 8A and USB block erupters draw just over 500mA, it should be safe drawing 5A to 6A and thats below 80% load on the power supplies.
I will post back results when I get and have tested them.

5VDC 8A 40W POWER SUPPLY:

http://www.ebay.com/itm/Adapter-110V-240V-AC-5V-DC-8A-40W-Power-Supply-Transformer-AU-EU-US-UK-Optional-/181057301019

http://www.ebay.com/itm/110V-240V-AC-5V-DC-8Amps-40W-Universal-Power-Supply-Power-Adapter-High-Quality-/160861732282

http://www.ebay.com/itm/Universal-Power-Supply-Adapter-110V-240V-AC-8A-40W-for-LED-Strip-Christmas-Light-/160909587091

These are the hubs I have and working on R-Pi

10 PORT HUBS:

http://www.ebay.com/itm/10-Port-USB-2-0-External-HUB-W-Power-Adapter-For-PC-Mac-W-Cable-Silver-New-/370872939627

http://www.ebay.com/itm/Hot-Sale-JHRS-High-Speed-10-Port-USB-2-0-Hub-Multi-Outlet-Power-Strip-Type-/200948954914
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August 09, 2013, 08:28:07 AM
 #284

Well, I don't need no stinking hubs to hash...while waiting for them to arrive anyway.  Time's a-wastin'.  MacGyver would be proud.  Smiley















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August 09, 2013, 08:40:27 AM
Last edit: August 09, 2013, 09:09:23 AM by Nemo1024
 #285

@visdude: Awesome  Cheesy

the ports on the USB hub above look too close together, probably only good to get 4 USB erupters going.

Yes, they seem to be a bit too cose. The distance between ports should be a little wider than the width of the USB port: 12+mm

This might be slightly more promising:

http://www.amazon.co.uk/TeckNet%C2%AE-Power-Adapter-Cable-Chipset/dp/B00DCO9XV8/ref=pd_sim_sbs_computers_5

But the spacing uncertainty is the reason why I did not add any of them to the list. Has anyone tied them? Please report. Wink

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August 09, 2013, 10:25:36 AM
 #286

@ visdude,you are more clever than MacGyver  Cool  He would have made a really big messy looking contraption,that all looks like some kind of "picasso" art   Cheesy

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August 09, 2013, 11:44:49 AM
 #287

I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?
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August 09, 2013, 11:49:23 AM
 #288

Well, I don't need no stinking hubs to hash...while waiting for them to arrive anyway.  Time's a-wastin'.  MacGyver would be proud.  Smiley

















Aren't they just connected to the ports of his computers?
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August 09, 2013, 12:00:19 PM
 #289

I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?

I tested with two Erupters. One runs without any air moving around it, the other lies flat on P4-grade heatsink with copper core and as much contact surface as I could get. The first one hashes at 280~310, the other one at 338, and the uncooled one gets twice as many HW errors. Switching which one gets cooled, switches performance figures as well. So yes, cooling plays some role. However, a bank of closely sitting 18 Erupters (in 3 D-Link hubs, which lie one on top of the other), which get cooled by one Acrctic Breeze fan blowing strait at them, all run at 335 and 1-7 HW errors each (after 10 hours).

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August 09, 2013, 12:03:34 PM
 #290

Very good to know that. Thanks!
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August 09, 2013, 03:40:50 PM
 #291

I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?

I tested with two Erupters. One runs without any air moving around it, the other lies flat on P4-grade heatsink with copper core and as much contact surface as I could get. The first one hashes at 280~310, the other one at 338, and the uncooled one gets twice as many HW errors. Switching which one gets cooled, switches performance figures as well. So yes, cooling plays some role. However, a bank of closely sitting 18 Erupters (in 3 D-Link hubs, which lie one on top of the other), which get cooled by one Acrctic Breeze fan blowing strait at them, all run at 335 and 1-7 HW errors each (after 10 hours).

I found that without any cooling, they run around 335Mhash and about 1.3-1.8% HW errors. minimal cooling or airflow improves it to about 335.5mhash and 0.9-1.3% HW errors. (i have a usb fan in the mail because i hate how hot these get in proximity to my fingers (laptop))

24" PCI-E cables with 16AWG wires and stripped ends - great for server PSU mods, best prices https://bitcointalk.org/index.php?topic=563461
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August 09, 2013, 03:51:00 PM
 #292

pic with new 90 amp power supplies, brought price per port to less than $2

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August 09, 2013, 03:59:57 PM
 #293

wow samha1n that is a very pretty sight. Can you tell us where you got the 90 amp psu's from?

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August 09, 2013, 04:45:54 PM
 #294

pic with new 90 amp power supplies, brought price per port to less than $2
http://i.imgur.com/YQDq0zP.jpg

 Very nice setup !
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August 09, 2013, 05:57:12 PM
 #295

I wonder if this is what he got?

http://www.cdiweb.com/ProductDetail/HRPG4505-Mean-Well-USA/402881/pid=568?gclid=CLzbnvf38LgCFZKi4Aod8x4AZg

or this:

http://store.bravoelectro.com/powersuppliesinternalpowersuppliesenclosedwithcover-hrpg4505bracdcruggedpowersupply450watt5voltenclosedchassis-p-1808.html

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August 09, 2013, 07:48:32 PM
 #296

Just tried one that does not work even though it says it has a 5V 2.5A AC adapter:
Only was able to get one erupter hashing.

Ativa Mobil IT 7-port 2.0 usb Hub.
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August 09, 2013, 09:28:39 PM
 #297

How do we get this thread pinned? too many people starting new threads about HUBs. Undecided
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August 09, 2013, 10:03:16 PM
 #298

The 10 Port USB 3.0 Hub with a 12V 3A power adapter from Gearmo has been working exceptionally well for me using all 10 ports, especially @ $49.99 on Amazon.

http://www.amazon.com/gp/product/B00BZABGWK/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00BZABGWK&linkCode=as2&tag=pin-im-suns-20

I bought 4 of these and they have been stable for well over a week now.  Not a single issue.   The only drawback is they are USB 3.0 which probably won't work with a raspberry pi.


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August 09, 2013, 11:12:14 PM
 #299

I'm running hundreds of them, for weeks now, with cheapest hubs I could find on amazon, at sauna level ambient temps that make bfl devices cower in perpetual throttle down. Per port cost ~$3 per port, including the power source. 5 minutes or less of soldering per hub.

Soo, what soldering do you have to do?
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August 10, 2013, 03:35:32 AM
 #300

pic with new 90 amp power supplies, brought price per port to less than $2
http://i.imgur.com/YQDq0zP.jpg

 Very nice setup !

From your picture, I count ~150 BEs so you 've probably hit the USB 127 devices per bus limit.

Care to share your experience on that?

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