USB hubs for ASICs

[Morblias]

In preparation for ASICs, what USB hubs do you have/are going to buy?

I am currently leaning towards http://www.manhattan-products.com/en-US/products/9583-mondohub

The ports are only 500mA, but I am assuming BFL Jalapenos will have something like dual usb inputs.

[1714865707]

1714865707

[1714865707]

1714865707

[squall1066]

Wow 28 ports!! someone has a lot of pre-orders! 
I will just be getting a 10 port powered USB hub

[kjlimo]

I think you might run into logistical issues of keeping all the units & power cords that close together even if you have 28 units.

I bought a $7 cheap 10 port powered USB and I'm regretting it.  It stops working and loses connection about 1-3 hours after starting...

So I'm looking to spend more like $30 for a decent one.

[Desolator]

The problem with USB hubs is there aren't any "good" ones.  There are only okay ones.  Newegg has 254 of them and none have significant numbers of high ratings.  If you want one that probably won't fail too soon, I'd go with basically anything without horrific ratings from:

Inland
Bytec
SIIG
Koutech
Belkin
Hawking
US Robotics
Kensington
TrendNet
Sabrent

A lot of those companies make some pretty bad ones but they also carry a couple that are pretty nice.
Ultra "makes" really bad products but their hubs I've had a lot of luck with too. (they don't make anything, they buy OEM and put their name on it).

if I had to buy one right this second, I'd say none of the above and get this beast:
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4621333&CatId=392
not a bad price either

[Mobius]

In preparation for ASICs, what USB hubs do you have/are going to buy?

I am currently leaning towards http://www.manhattan-products.com/en-US/products/9583-mondohub

The ports are only 500mA, but I am assuming BFL Jalapenos will have something like dual usb inputs.

You need to determine if redundancy is important, 1 large hub = single point of failure,  Multiple smaller hubs will spread out the risk and allow some margin of safety.  One fails and you can plug into the others. Also make the determination if you will need USB 3.0 ports before buying.

[freeAgent]

Instead of buying a ton of Jalapenos, why not buy Singles?  They presumably won't get their power from the USB anyway, so pretty much any hub should work.  You may also want to check out which hubs people are using for Raspberry Pi devices.  The Raspberry Pi is extremely picky when it comes to USB, so anything that works with it is pretty well designed.  You'd want to go with the ones with the highest power ratings: http://elinux.org/RPi_VerifiedPeripherals#Working_USB_Hubs

I use this one, but it sounds like you want more ports.  It's got a pretty good port:power ratio though (2.6 Amps and only 4 ports).  It should be good to power two Jalapenos: http://www.amazon.com/Belkin-Ultra-Slim-Series-4-Port-F4U040v/dp/B005A0B3FG/

Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub:  .9 * (number of Jalapenos) = Amperage output of USB hub.  That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports.  That also assumes the Jalapeno powers itself with two USB plugs.

[Morblias]

Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub:  .9 * (number of Jalapenos) = Amperage output of USB hub.  That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports.  That also assumes the Jalapeno powers itself with two USB plugs.

Wow I did not know this, I am an idiot when it comes to electrical stuff. I just plug it in and hope I don't start a fire. I did one of my single trade-ins for 8 Jalapenos just for the hell of it, so I will need a lot of usb ports for those plus the SCs and bASICs I ordered.

[freeAgent]

Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub:  .9 * (number of Jalapenos) = Amperage output of USB hub.  That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports.  That also assumes the Jalapeno powers itself with two USB plugs.

Wow I did not know this, I am an idiot when it comes to electrical stuff. I just plug it in and hope I don't start a fire. I did one of my single trade-ins for 8 Jalapenos just for the hell of it, so I will need a lot of usb ports for those plus the SCs and bASICs I ordered.

Yeah, given the prices, you'd be better off getting 4 of the Belkin USB hubs I linked to and using those.  They're $20 each and power 2 Jalapenos vs $60 each for 4 Jalapenos.  I hope you've got 4 open USB ports on your computer (or multiple computers)

[Unacceptable]

I asked this in this thread :

https://bitcointalk.org/index.php?topic=114428.0

And at BFL forum I posted some findings:

Heres a site with a great deal,never bought from them before,so use at your own risk.I will

13 port,5 volt-4 amp $35

http://www.synchrotech.com/product-u...b_13-port.html
 
Another 4 amp w/4 ports model $42.99
 
http://www.synchrotech.com/product-u...d-4-HU430.html
 
Each Jalapeno is 900ma,so 4 Jallies per hub,with 300ma left over.
 
But.....the ports I think only support 500ma each,so you'll need the dual USB cable too for each Jally

http://www.newegg.com/Product/Produc...82E16812270226
 
https://forums.butterflylabs.com/showthread.php/13-Lots-of-Jalapenos-on-one-PC

I'm still unsure,is USB 2.0 500ma & USB 3.0 1000ma?? Or do some 2.0 handle 1000ma??

[freeAgent]

No standard USB 2 port coming from a computer supports 1A.  There may be special ports or features on some motherboards that support 1A for quickly charging devices, but I wouldn't count on it.

[dankroxel]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182208

[Unacceptable]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182208

Good find 

Heres the full specs:

Model No.:RHB-500

Color:Black

Type:USB

Standards:USB 2.0/1.1

Ports :1 x Upstream, 10 x Downstream

Transfer Rate :1.5/12/480Mbps

Power Input :Self-power mode / BUS-power mode

Power adapter: DC 5V 4A

Hub Dimension:155 x 69 x 28 mm / 6.1" x 2.7" x 1.1" (not including power adapter)

Weight:Unit Weight (not including adapter): 145g / 0.32 Lbs
Power Adapter: 195g / 0.43 Lbs

Warranty:1 Year


http://www.rosewill.com/products/1543/ProductDetail_Specifications.htm

[mtbitcoin]

A lot of newer boards come with high powered usb devices that are designed to support charging from a USB port and these should be sufficient for running the Jallies. In addition a lot of board manufacturers such as gigabbyte, msi, etc also have released  software for high charging. The only exception I see is if you intend to run a large amount of the Jallies on a single machine, but if that was the case then getting a single would probably be a better idea

Cheers

[Berni]

I bought Exsys 1177, the Usb Hub has 7 Ports and a 4A Power Supply.
I will install the Hub inside a 4HE 19", and the Hub has Support for power Supply by floppy connector, so no Adapter is neccessaryto use the ATX power Supply.

[Desolator]

No standard USB 2 port coming from a computer supports 1A.  There may be special ports or features on some motherboards that support 1A for quickly charging devices, but I wouldn't count on it.

+1 and also most pairs of USB ports right next to each other on the front of the case or inline USB ports on the motherboard itself share an electrical circuit so they're 0.5A total between them, each being able to pull the entire 0.5 though.  So if Jalapenos need 1A via USB, A LOT of people are going to find that their system won't run them.

[Morblias]

Would something powered by a molex connector work to power 4 jalapenos? Like this?
http://www.ebay.com/itm/EEEKit-for-PC-4Port-USB-3-0-HUB-to-PCI-e-PCI-Superspeed-Card-Adapter-NEC-Chipset-/170859690702?pt=US_Internal_Port_Expansion_Cards&hash=item27c807face

[Unacceptable]

I emailed Gigabyte about my mobo:
 
Do the USB ports (either 2.0 or 3.0) allow 500 milliamp or 1000 milliamp as a max current draw? If yes, which ones ?
 
My motherboard model: GA-990FXA-UD3(rev. 1.0)
 
I'll be using them for several Bitcoin mining devices consuming 4.5 watts (900 milliamp each).
 

From Gigabyte:
 
Dear Customer,
 
All are the same and they can accept up to 1A
 *Whether to support 3X USB power design, it may vary by models*
 We are unable to verify your device as only iphone, ipad been verified for charging.
 
WooHoo!!!!!!!!!!!!!!!!!! I still may get the dual USB cables,just to be sure I don't fry my mobo.

[Desolator]

btw almost any Asus or MSI motherboard made recently has a phone charging smart 3x power feature and every one I've ever seen recently supports 1 amp power.  I guarantee no laptop on the planet under $800 does though.

[abbeytim]

well the small asics like the bfl jalepeno are usb powered

the bfl single sc and the bASIC have there own barrel connector for power

[MrTeal]

Just buy one of these and rewire a 12 port hub.
http://www.ebay.ca/itm/12A-5V-60W-Switching-DC-AC-Switch-Power-Supply-Driver-LED-Strip-CCTV-/260983585712?pt=LH_DefaultDomain_0&hash=item3cc3d57bb0

Alternately, if you have a newer PSU that uses a DC-DC converter for the lower voltage rails, just use the 5V rail from that. Most PSUs can put out way more 5V power than anyone uses.