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Topic: Which USB hub to use with Block Erupters | NanoFury NF1 | BPMC Red Fury | Ant U1 - page 21. (Read 128592 times)

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The Last NXT Founder
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5V 20A supply = 5.26VA per port....   aaaaiiiight



cheers,
kev

*drool*  where can we det that?
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This is not good for my Chi... Yifu
5V 20A supply = 5.26VA per port....   aaaaiiiight



cheers,
kev
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The Tek Republic TUH-2700 is on sale at NewEgg for $13 for the next day or two. Linky.

Remember that it can run max 5 miners. In that respect D-Link with its 6 miner capacity is a better bargain.
Perhaps, but the tek republic plus a 5v4a supply from ebay for 8 bucks gives you 7 working ports for 21 dollars instead of 6 working ports for 35.

I have a couple of those hubs.  One tek republic from newegg and the other a cables unlimited rebrand.  The power plug looks to be 5.5od/2.5id but I will confirm next week when the 8 buck supply arrives.
An update on this experiment.  The plug on the 5v4a supply I bought off ebay does not fit the tek republic hub, nor does it fit a dlink dub-h7.  I have parts on order to make an adapter cable to avoid cutting the plug off the smaller supply that came with the hub and soldering it to the new supply.
legendary
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Oops. And no one caught it before Smiley I actually didn't see it at first when you pointed it out, and had to hunt for the typo letter-by-letter.  Grin
newbie
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Replacement AD adapters / adapter modifications

I would suggest that you change that to read, "Replacement AC adapters".

I'm sure it was just a typo.
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PogChamp
Raspberry PI resources
...Additionally, there seems to be a limit of 49 BEs that one Pi can control at once.

Any idea what this limit is caused by?  If possible I'd like to have one unit controlling everything and if the limit is due to processing power I could opt for a cubieboard 2 or another open aio.

I've noticed my utility rate is significantly higher when I run my BEs off one of my WIN7 rigs that is mining LTC at the moment.. I think the RPi is a cool piece of gear, but no matter what I tweak on it, doesn't seem to be "even" or better than my W7 setup.  (45 BEs at the moment awaiting a couple more hubs)

The thing to remember with the Pi is the low power consumption. If mutiple Pi's use less power than one PC, that may be the way to go.

Oh, concur.. and will perhaps look into it further in the future... but at this time I can piggy back off an already up and running LTC rig and draw no additional power since the hubs are powered..


Not only that, but the space requirements are far less.  For someone who isn't mining LTC these tiny all in one boards are the way to go.  If I find anything out about the limits I'll definitely post it here, I may pickup a cubieboard2 and test it.

Also I wasn't referring to it being any better than a desktop.  I was referring to how weak the soc of the pi is, wondering if that is the cause of the limit.
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Raspberry PI resources
...Additionally, there seems to be a limit of 49 BEs that one Pi can control at once.

Any idea what this limit is caused by?  If possible I'd like to have one unit controlling everything and if the limit is due to processing power I could opt for a cubieboard 2 or another open aio.

I've noticed my utility rate is significantly higher when I run my BEs off one of my WIN7 rigs that is mining LTC at the moment.. I think the RPi is a cool piece of gear, but no matter what I tweak on it, doesn't seem to be "even" or better than my W7 setup.  (45 BEs at the moment awaiting a couple more hubs)

The thing to remember with the Pi is the low power consumption. If mutiple Pi's use less power than one PC, that may be the way to go.

Oh, concur.. and will perhaps look into it further in the future... but at this time I can piggy back off an already up and running LTC rig and draw no additional power since the hubs are powered..
hero member
Activity: 490
Merit: 501
Raspberry PI resources
...Additionally, there seems to be a limit of 49 BEs that one Pi can control at once.

Any idea what this limit is caused by?  If possible I'd like to have one unit controlling everything and if the limit is due to processing power I could opt for a cubieboard 2 or another open aio.

I've noticed my utility rate is significantly higher when I run my BEs off one of my WIN7 rigs that is mining LTC at the moment.. I think the RPi is a cool piece of gear, but no matter what I tweak on it, doesn't seem to be "even" or better than my W7 setup.  (45 BEs at the moment awaiting a couple more hubs)

The thing to remember with the Pi is the low power consumption. If mutiple Pi's use less power than one PC, that may be the way to go.
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Just out of curiosity, I'm about to upgrade my farm to 450Mhz per BEE, therefor I got Custom heat sink.

https://bitcointalksearch.org/topic/m.2973460

Unfortunatelly I will have to use smaller 7port Hubs for it, with new heat sink they won't fit in 10's
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i ordered a white one from the amazon website and it came with the proper 4A power cord... mining 9 on the 3A, and 10 on the 4A, been fine for the last 24 hours.

I am glad you mentioned that because I was driving myself bonkers trying to figure out why only 9 would work, turns out I got the 3A Power supplies.

Any idea how to get 4A replacements?

legendary
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I am still waiting for 3 more hubs. Once I have them in hand, I'll try to max out my Pi and see how many it will handle at one.
It was running pretty solid with 30 BEs.
When I upped that number to 45, it started losing a Be here and there (a different BE, depending on hub connection order), so there might be something in that 49 limit...

I have the feeling that all 60 Bes are going to run off my Win7 machine in the end, while Pi will be used for other fun projects.
hero member
Activity: 742
Merit: 500
Raspberry PI resources
...Additionally, there seems to be a limit of 49 BEs that one Pi can control at once.

Any idea what this limit is caused by?  If possible I'd like to have one unit controlling everything and if the limit is due to processing power I could opt for a cubieboard 2 or another open aio.

I've noticed my utility rate is significantly higher when I run my BEs off one of my WIN7 rigs that is mining LTC at the moment.. I think the RPi is a cool piece of gear, but no matter what I tweak on it, doesn't seem to be "even" or better than my W7 setup.  (45 BEs at the moment awaiting a couple more hubs)
member
Activity: 74
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PogChamp
Raspberry PI resources
...Additionally, there seems to be a limit of 49 BEs that one Pi can control at once.

Any idea what this limit is caused by?  If possible I'd like to have one unit controlling everything and if the limit is due to processing power I could opt for a cubieboard 2 or another open aio.
member
Activity: 69
Merit: 10
Updated the OP. See if I overlooked any mods.

Oh and I saw this on MinePeon thread. Reposting:


Did you make or bought the power cables from PSU to the HUB's? I'm also using one of those 10 ports HUB (with 9 USB Gizmos), with a Velleman multivolt, that gives 7,5 Amperes @ 5 volts.
Originally I ordered some 2.1mm connectors but they haven't arrived, being impatient I cut the 5V lines out of the molex connectors of the atx psu (bottom of pic) and soldered the 5V wires straight to the hub.. and plugged the fans into the molex (which now only has 12V lines).

ATX PSU has 28A @ 5V  4X 20A @ 12V (Reserved for K16`s)
Your idea is great... i "invented" a cable, but I'm connecting the 10 ports HUB to the HD molex cable and 2 or 3 of the Gizmos were in error... perhaps not enaph current... Better to connect again to the Velleman 7,5 amperes PU.




Some said that problem with ATX power supply is that even if it says the current on +5V line is enough, You have to Load the PSU with all lines (like it is in PC) 12V3.3 +5-5 -12 etc etc, Only than the PSU ATX will work as it should be (dunno why). If done on a single 5V line there will be a hudge voltage drop, and below 4V on USB port Errupters won't work.
But I might be wrong, someone might have done something wrong while connecting.
Best choice is the industrial power supply cooled with a FAN, 2x30A with 100 BEE is working perfeclty as planed.

Now I'm planning toupgrades BEEs to 16Mhz crystal (450 Mhz), more power drained more heat, (new heat sinks should be here today You will love them), Disadvantage is that you probably can't run it on normal HUB due to more than 500mA of current (once its done I will make all measurments necessary and post them).



If its not for USB 3.0 HUB's which have 12VDC power input.... it will damage 5V Hubs.
hero member
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The Last NXT Founder
Where did you get those USB fans Noitev? They look much longer then the Antec ones and a bit more finger friendly with that plastic sleeve.
cheapest on ebay and it keeps em cool
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Where did you get those USB fans Noitev? They look much longer then the Antec ones and a bit more finger friendly with that plastic sleeve.
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I inadvertantly found that I have another hub to add to the list. This 7 port from Amazon has handled 5 Erupters in a suprisingly good fashion:

http://www.amazon.com/gp/product/B000KUQ8FG/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1

It looks like the generic version of Tek Republic TUH-2700.

As another update it has run since the last post with 6 BE's.

Also, I figured out the problem with the cheap 10-hub with the 5v 40a Regulated power supply, with the first hub I switched the ends and burned it out :-( I was able to get a second cheap 10-port to hum along swimmingly. This is similar to several others who have done the same thing, it is certainly the most economical option if you are brave.

MM
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