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Author Topic: Largest Effective USB Hub for Block Erupters?  (Read 8148 times)
ssateneth
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August 01, 2013, 12:04:01 AM
 #21

I dont find that list of hubs useful ... there is plenty of cheaper hubs on ebay, .... maybe they can break down but ... everything is made in china

http://www.ebay.com/itm/10-Port-Hi-Speed-USB-2-0-Hub-Power-Adapter-for-PC-Laptop-Black-5V-DC-2A-N4U8-/350840818287?pt=US_USB_Cables_Hubs_Adapters&hash=item51afbe0a6f

0.7 usd/1usb port

Absoloutely not. These are garbage. Only supports 2 USB miners without AC adapter, and 4 miners with AC adapter. If you directly wire in a high current power source, such as a computer power supply to barrel adapter, the most you can expect to work is 4-8. I bought 5 and returns them all for a full refund. Dont bother with these.

What are you using now?

I am using these instead. They work without a hitch and come with a powerful 60 watt power adapter. http://www.juicedsystems.com/product/10-port-usb-3-0-hub/

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flipper
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August 01, 2013, 05:07:20 AM
 #22

When modifying USB hubs for higher current capacity, you must open the housing and desolder the passthrough diodes for the USB host and short out the diodes to the PSU input. This will make pretty much any cheapo hub capable of running at full power on all the ports (in theory)

I modified a Rosewill 7 port hub from Newegg. It came with a 2A adapter which would've only been enough for 3 erupters or so, but I removed the host diode and shorted the DC input diodes. It had four 1A schottky diodes, one on the host side and three on the DC jack. They will be easily overloaded and will burn out or cause problems past 3A of current.

After the mod it happily runs four AMUs, a Raspberry pi and a BFL Jalapeno. YMMV, happy hacking.








Good job. Nice to hear the system is working. One question, Instead of shorting out the three diodes, would it not be safer to replace them with 3 amp ones?
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August 01, 2013, 05:17:10 AM
 #23

Yes you could certainly do that, but the diodes are mainly so the wall wart supply couldn't backfeed power into your PC's usb port and vice versa. Since I removed the PC power passthrough diode it can't run as an unpowered hub anymore which removes that issue. Also you lose a bit of efficiency from the forward voltage drop of the diodes.
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August 02, 2013, 04:47:34 AM
 #24

Yes you could certainly do that, but the diodes are mainly so the wall wart supply couldn't backfeed power into your PC's usb port and vice versa. Since I removed the PC power passthrough diode it can't run as an unpowered hub anymore which removes that issue. Also you lose a bit of efficiency from the forward voltage drop of the diodes.
Thank you for the reply. I'm planning on modifying a hub myself soon.
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August 04, 2013, 01:21:18 AM
 #25

I modified a Rosewill 7 port hub from Newegg. It came with a 2A adapter which would've only been enough for 3 erupters or so, but I removed the host diode and shorted the DC input diodes. It had four 1A schottky diodes, one on the host side and three on the DC jack. They will be easily overloaded and will burn out or cause problems past 3A of current.
Great picture!  Leaves little doubt that the three plugs on the right are one hop away from the input but the four on the left are two hops.  Very important if you are going to cascade hubs.

One minor nit.  The diodes also protect against hooking up the power backwards.  It wouldn't be hard to pigyback a couple of extra 1 amp diodes to increase capacity if one wanted to increase capacity without removing that protection.
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August 08, 2013, 08:16:11 AM
 #26



Or maybe this one if it provided enough oomf...
http://www.ipadcarts.com/solutions/DS-IP-SC-49.htm

http://www.ipadcarts.com/images/49-2_%20large.jpg


All of them are pretty pricey though.  Probably better off with multiple Anker USB3 hubs.

That's the 2nd Gen unit of my setup pictured above.  It does have enough oomph if you "upgrade" the power supply to something with 35A+ on the 5v.  I swapped in an ancient antec on mine.

Their pricing is atrocious.  Nothing like fleecing schools.

Has anybody considered trying to contact ipadcarts for a group buy?
kmtan
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August 08, 2013, 10:07:10 AM
 #27


where to purchase this hub?

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August 08, 2013, 02:42:58 PM
 #28


http://www.ipadcarts.com/solutions/DS-IP-SC-49.htm
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August 08, 2013, 03:09:47 PM
 #29

I sold one of the notorious 20-port hubs to a friend of mine for about $90 USD.. He actually got all 20-ports working. So that may be one of the more cost-effective solutions at that volume. Allegedly (and I need to confirm this with him - but it all seems legit) that the key is that you have to use 2 USB cables to your PC, and it works just fine.
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August 09, 2013, 06:25:45 PM
 #30

Running 49 Eruptors on that board would net him ฿6.67 a month.

Just 10 Eruptors cost about ฿6.
 Sad
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August 09, 2013, 06:45:31 PM
 #31



Or maybe this one if it provided enough oomf...
http://www.ipadcarts.com/solutions/DS-IP-SC-49.htm




All of them are pretty pricey though.  Probably better off with multiple Anker USB3 hubs.

That's the 2nd Gen unit of my setup pictured above.  It does have enough oomph if you "upgrade" the power supply to something with 35A+ on the 5v.  I swapped in an ancient antec on mine.

Their pricing is atrocious.  Nothing like fleecing schools.

Has anybody considered trying to contact ipadcarts for a group buy?
Cambronix the supplier of ipadcarts is charging $1200 for each of those hubs wholesale.

Message me if you have any problems
xjack
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August 10, 2013, 01:01:33 AM
 #32

Running 49 Eruptors on that board would net him ฿6.67 a month.

Just 10 Eruptors cost about ฿6.
 Sad

Close - about BTC7.75 and counting, for now.


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dairy100
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August 10, 2013, 05:00:23 PM
 #33

what about the orico 10 port usb 3 units? those have good reviews
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October 02, 2013, 03:19:32 PM
 #34

what about the orico 10 port usb 3 units? those have good reviews

Well, I've been running a pair of those and have been running them with ten erupters each in them 24/7 for just over a month. Only earlier tonight one of the psu's failed. I was pushing it though, the rule of thumb seems to be 5 amps per ten erupters and the psu is rated at 4 amps, so I expected a diminished operating life, but I expected it to last more than a month. I'm now trying to hunt down another psu that pushes perhaps 6 amps or more and will be compatible with the hub, I found this thread while scouting for recommendations, so if anyone has any thoughts, please let me know.

Other than the psu issue (which was really my fault) the hubs have been running flawlessly. I hear stories of people with other hubs who have trouble with some ports not working intermittently, having to turn the power off and on regularly to get all ports talking with their miner and other annoying issues that slow down mining output and generally just irritate and consume time. Not so with these hubs, at least, not in my short experience with them so far, they've hardly missed a beat and if aesthetics are your thing, they have fantastic blue LEDs that beam up the edge of each erupter for a clean futuristic look:



I took this pic when I first got them and I used each alternate port initially to see how they ran, when they ran fine, I filled up the hub with the maximum ten erupters, which of course doubled the power consumption stressing the psu. In fact, I liked the hubs so much that I bought another pair of them as I've got some BPMC Fury's arriving soon, so at least I had a spare psu when it died on me earlier. However, I need to be realistic, I need more power to run them more efficiently, so any recommendations anyone has will be greatly appreciated.

Smiley


philipma1957
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October 02, 2013, 04:11:15 PM
 #35

I have a link from amazon great psu brick  wait a minute

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October 02, 2013, 04:12:56 PM
 #36

http://www.amazon.com/gp/product/B000VE7GQQ/ref=oh_details_o04_s01_i00?ie=UTF8&psc=1  


 works with all 10 port solid aluminum  hubs  

  anker orico    if you have the newer plastic 10 port orico or anker it will also work

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notlist3d
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October 02, 2013, 04:17:38 PM
 #37

I love my anker (and off brands of it).  They look great in a row 10 up in air.  But right now nothing competes with MCM as far as cost per port.  Only thing is they are slow shipping, and amazon normally is out at decent price so have to do direct.
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October 02, 2013, 05:13:17 PM
 #38

http://www.amazon.com/gp/product/B000VE7GQQ/ref=oh_details_o04_s01_i00?ie=UTF8&psc=1  


 works with all 10 port solid aluminum  hubs  

  anker orico    if you have the newer plastic 10 port orico or anker it will also work


Thanks for the link. I actually looked at that psu on Amazon but did you look at the customer reviews down below the listing? They are some of the worst I have seen for any product, so I just will not buy that item. If it works well for you, that's fine, I'm looking for a well-built, compliant psu that drives the full ten erupters and gives me a little 'sleep-easy' at night.


I love my anker (and off brands of it).  They look great in a row 10 up in air.  But right now nothing competes with MCM as far as cost per port.  Only thing is they are slow shipping, and amazon normally is out at decent price so have to do direct.


Thanks for mentioning that company, I am assuming this is the link to them? -

http://www.mcmelectronics.com/browse/USB-Hubs-Switches/0000000641

I probably need a 12V 6A regulated psu, that should be more than sufficient to work with the Orico hubs... by the looks of it, could be tricky to find. Hard to believe really, you'd have thought there would be loads of different types available. Maybe I'm just looking in the wrong place?

Thanks for your comments guys, I really appreciate them.

Smiley

rnaodm
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October 02, 2013, 06:48:59 PM
 #39

What do you guys think of this.

http://dx.com/p/10-port-usb-2-0-hub-with-external-power-source-100-240v-ac-adapter-33189

Can you run a different but simple power supply, something with 5 volts but with 4amps, That should let you comfortably run 7 ea.
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October 02, 2013, 10:44:38 PM
 #40

What do you guys think of this.

http://dx.com/p/10-port-usb-2-0-hub-with-external-power-source-100-240v-ac-adapter-33189

Can you run a different but simple power supply, something with 5 volts but with 4amps, That should let you comfortably run 7 ea.


Hmm, not sure, sorry. I can't quite see a brand name to properly identify the hub, it could just be a generic Chinese hub that doesn't carry a brand, I cannot say.

What I do suggest is, that you take a look at this thread here, as far as I know, there is a continually updated list of usb hubs on the OP and a whole bunch of knowledgeable folks willing to offer suggestions:

https://bitcointalk.org/index.php?topic=253749.0

Good luck with it.

Smiley

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