Topic: Which USB hub to use with Block Erupters | NanoFury NF1 | BPMC Red Fury | Ant U1 - page 25. (Read 128592 times)

Thanks!

Great review!

A work in progress:



These are the 7-port hubs from MCM.  As you may have already noticed, these are just the generic hubs from China that's all over the Bay and sold dirt cheap albeit with less capable AC adapters. All MCM did was couple the hubs with better power units and marketed them.  I could have done better and further reduced the per port cost if I had put them together myself but I was in a jam as I was expecting more miners to arrive in a couple of days and I only have so much USB ports on my rigs.  I had to pony up for a 2-day shipping and for the applicable sales tax though which added a little to the per port cost but it's OK because I already ROI'd those extra expenses.  

MCM's site specified that the AC adapters are 5V 2.5A.  I then called tech support to verify the specs.  The gentleman literally called their warehouse while putting me on hold and came back on with the good news that it is in fact, a 5V 3.5A.  Here's a confirmation:



It supports seven miners with no issues; tested it for a few hours.  With all seven BEs hashing, the power units get very warm (an optimistically good indication that the internal heatsinks are doing their job of dissipating heat through the case) but one could still touch them for the longest time and not experience any burning discomfort.

The seven BEs registered 21W AC off the wall on a Kill-A-Watt while mining (100% load or thereabouts).  That's 3W AC for each miner.  Based on the BE's specified rating of 2.5W DC, that puts the AC adapters' efficiency at around 83% at 100% load; at 50% load (peak) it would probably be at least 85% efficient.  That's impressive for a wall wart.  If I'm not mistaken, this falls within the 80 Plus Bronze category.

I'm expecting a few more miners coming in on Monday and I intend to max them out and populate the two rear ports on each of them.  Here they are in action:

http://s1330.photobucket.com/user/visdude/media/MVI_0076_zps911be64e.mp4.html

i thought 30 was ok.... pi was supposed to be good to about 42 or so. how many are you guys running per pi/pc for the bigger farms?

You have too many running at once,take one out try it,repeat until they run.Be it the USB hub or what I have no idea,but thats how I find out....................

Try BFGminer,follow these instructions:

https://www.btcguild.com/index.php?page=support§ion=blockerupter

anybody using open case psu's can you give me some advice?

i have a 5v 20a psu with generic 10 port ebay hubs. they all light up with BE's but wont all launch the mining program. right now i have 35 connected, all lit up, but only 8 launches on bitminter with the uart com drivers. i had them all running using the zadiag drivers and 3.2.0 & 3.3.2 but they run for about an hour then lock my pc up. on the pi sometime most would launch but then start dropping out. when i swapped to brand name hubs on the pi they all worked. so something in my setup.
i dont have the 5v wire cut going to the computer. also i'm using probably 18-20 gauge wire going to the hubs and lamp cord going to the 120v.
also do you guys daisy chain these hubs one to another to another, or do you use a central hub with a bunch of hubs connected into it.

Thanks for pointing me to the link. Looks like it's not going to beat the market in terms of $/port

Fire marshall bill would be proud!

awesome

Thanks guys.

You mean something like this:
https://bitcointalksearch.org/topic/m.2863038

@sunsofdust: I am adding your find to the table.

Also, I will pull some hubs, which got negative reviews into a separate "Beware" table.

And here is my contribution to the review/images. 30BEs running of 5 D-Link DUB-7 hubs. They are currently hosted by a PC. Once I am done playing with setting up my newly-acquired Pi, I will host them off it.

how about doing a custom design of,  say, a 49 port usb 2.0 hub? Besides power, is there a data rate requirement?

What would be a reasonable $/hub to make a custom design attractive?

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?

Soo, what soldering do you have to do?

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.

How do we get this thread pinned? too many people starting new threads about HUBs.

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.