Topic: Which USB hub to use with Block Erupters | NanoFury NF1 | BPMC Red Fury | Ant U1 - page 20. (Read 128592 times)

i actually use a cheapstake passive 7-portish hub with desoldered all vcc pins
was the better option as my powering hubs all have non replaceable cables

You should expect backfeeding and/or power draw on USB line-in as default. To be on the safe side, splice the USB cable and cut the red wire, as was suggested before.

I can at least say regarding my D-Links that they draw from input USB. Without power on the intermittent hub, they can run 5 BEs; with additional power they run 6.

@MonocleMan: You might want to rotate the images 180 degrees.

http://dearhusband.com/monoclemanhub1.JPG
http://dearhusband.com/monoclemanhub2.JPG

So my experiment based on the works of other in this thread payed off, I bought the power supply from ebay and hooked it up to 4 hubs using thise barrel connectors from both mcm and monoprice.

The hubs themselves were $6 each, the power supply was $20 and I have them all plugged into my aitech 3.0 USB hub. So Far so good, 42 BE's running pretty smoothly.

MM

guys, can you add an colum "backfeed y/n" please?
and hub owners should check and report

power backfeeding (vcc on uplink port connected to power input)
is a serious problem for some hardware, i nearly killed my netbook

also such hubs tend to steal current from each other when cascaded

SolidbitShop did you overclock some of your ASIC miners to 400Mh/s or did they just arrive like that? If you did overclock them, how is the heat production off of those ones?

That is an awesome setup man.

Visdude, which angled adapters do you use there? And which fans are those? USB-powered?
I've updated the OP with info on your setup.

This is an update on the MCM hubs.  As I've mentioned in my initial review, it supports seven miners.  There are only 46 miners on this setup; 1+2 rear ports on the last two hubs respectively are not populated (waiting for more miners to come in):



...and here they are in action:

http://s1330.photobucket.com/user/visdude/media/MVI_0112_zps64f2f52e.mp4.html

The hub stands/bases were originally affixed onto the desk (here) but I found it to be inflexible and inconvenient.  So, I got a cheapo clipboard and a roll of masking tape at the local 99-cent store and made a movable platform out of it to organize the hubs.  This setup is ideal with these hubs since one can just pull it from the base and work on it independently from the rest (modular).  Partly seen in the lower right hand corner of the image is another hub.  I have started to create another row of seven MCM-type generic hubs (all black this time) along the other side of the clipboard.  I'm pairing them with 4A bricks (much better alternative than wall warts in that it does not waste and occupy two outlets on the power strip).  It comes out a little cheaper than MCM's without being subjected to exorbitant shipping charges and applicable sales tax.  I would also have a bit of a headroom power wise (.5A more).

The setup is currently hosted through a single USB 2.0 port on an old netbook and draws 11W off the wall while mining.

Ok,learning curve here  

I bought these:

http://www.amazon.com/dp/B0058RLD9C/ref=pe_385040_30332200_pe_309540_26725410_item

Almost $10 with shipping for 10 pieces-5.5mm x 2.1mm,very cool device & works very well.These work on my old USB hubs only,due to the inside diameter being too small.

I picked up one these from ebay:

http://www.ebay.com/itm/110638231265?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Almost $25 with shipping-It too works very well,so far,if it dies or malfunctions,I'll report on it later  

So,now I needed to find that same barrel adapter but in a 5.5mm x 2.5mm size (I think thats the size,no way to measure but by eye) to fit these:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817659004

Works well with 4 BE's,not 5, (2.6 amps) but the wallwort gets very warm,not too hot to touch,but very warm...........

Found em !!!!!!!!!!!  

http://www.bixnet.com/cnt525m.html

I'll be ordering a few & review them after I get em  

WARNING,watch the polarity,get a volt meter & check + & - is in the correct position,center or outer posts,BEFORE you connect!!!!!!!!!!!!

I 'm glad I checked,I cut an end off a wallwort & one wire had a dash marked on it,thinking it was negative,I wired it up.When I checked it was positive    No idea why it wasn't maked with little +'s like most are  

So,double check your polarities BEFORE connecting to your hub/device's  

Hasn't arrived yet, I've been somewhat on edge but the fans come today.  I'll be running two of these: http://www.newegg.com/Product/Product.aspx?Item=N82E16835106140 and I already have a few Arctic usb fans on the powerstrips.

No cooling? You are a brave man.
It's my experience as well that Rosewill/SL-Lab hub smoothly handles 8 devices.

Currently running 48 erupters on 6 Rosewill RHB-500 with one for daisy chaining to a Raspberry Pi.

Smooth so far, and as to the amount of devices a raspberry pi can support it seems like it's a hardware limitation.  I plugged in a Jalapeno and it didn't like it too much, it ran for a while then started crashing a few hours later constantly, resulting in a pi reboot to get everything back up.

Ah, that one. I thought the name sounded familiar. Well, I haven't been able to find a single block, going from 300MHs last August to 20GHs this August. You, at least, found something.

Now, back on topic. Does anyone have any more USB hub experience to share.

on a pseudo related note, I found a 268 million hash on 1 of my 10 miners only for it to be stale

You have me at a loss: silly as in "inefficient" or as in "awesome"?  
All BEs can be touched without burning your fingers and the airflow between the rows is good, yet I can have them sitting compactly.
I was actually planning to have them on top of another newer PC and install 2x120mm exhaust vents on top (that machine runs pretty cool as it is). I might just go through with it.

Oh, and you can't live without floppy. How are you supposed to move data (yes, all 1.44MB of it) around?  

Edit: And just a thought: 60BEs pushing 20 GHs in the same amount of space as BFL Jalapeno pushing 7GHs  

that's one mighty silly looking setup, hope there's no fans on top of your computer

Also, props for the floppy drive.

Dipo Electronic also do this hub:
Not sure of the cost, take no notice of the website price.

 

cheers,
Kev

I'll add that one to the Special hubs table. And, yeah, I want that one!

Here is an update on my final setup for 60 BEs:



3 d-Links are connected to an old Mag screen's USB 1.1 hub, the remaining 7 + fan to ST-Lab 10-porter (so, there are 2 USB cables out). Everything is driven by Win7 machine. The fan pointing downwards moves air over the AC adapters. Everything runs with almost no HW errors, so the power distribution seems to be sufficient.

I tried connecting the whole setup to Rpi, running MinePeon 0.2.2 and cgminer 3.3.4. At first it recognised and started mining on 57 devices (on one of the D-Links only every second device got recognised). After a while it dropped to 56 devices and stayed there for about 20 minutes, when I aborted the experiment. Cgminer was reporting a lot of timeout and comm error messages and BEs were blinking prettily (much more and brighter than when connected to Win7 machine, where you hardly see any blinking). RPi CPU load from Cgminer was about 34%, so it must be bus-related. My conclusion is that RPi is good for a limited number of devices (<30 which gave no comm errors or timeouts). For larger rigs, use a PC.

(Some hub-related discussion on the MinePeon thread: https://bitcointalksearch.org/topic/m.2983042)

Get in touch with Jason in their sales department and strike your own deal.
Any price on the internet is just a guide price. They also do a 36 port hub.

When I was pricing hubs I got Juiced Systems in USA down to $40 per hub for bulk. Then found them from China manufacturer for $34.99 in bulk,. but the linear spacing on those is not so good. The reason I went with the 19 port hub is it is Industrial grade with 1A per port guaranteed. Not many hubs can boast that.

cheers,
kev

yeah, some people who develope things are terrible at pricing. What would anyone possibly buy that for at that price. Maybe sell to the Gov.