POWER TO THE USB HUB (newb hobby style)
I had problems with this type of adapter in that it burnt out killing the usb hub (nasty smell) or it could
not supply the power needed for more than 2 red 5gh red bi-fury's on a 10 port usb hub.
http://i57.tinypic.com/308jn02.jpg
So more power was needed and this is my solution to the problem.
After reading many blogs and watching youtube posts which were all helpful i did this.
Thanks to all.
I got a 650w pc power unit to MOD.
http://i62.tinypic.com/2rr9pxy.jpg
I then soldered the green wire to one of the black wires this switches it on.
Secondly very important is to solder a 12v - 10w - 22ohm coil resister to a yellow 12v and black N wire.
It thinks its running a motherboard or it will make a high pitch whine and dies.
This leaves a bunch of black Neutral, red 5v yellow, 12v & orange 3.5v wires free.
Cap off any redundant wires i.e purple & grey
(Don't forget to insulate all bare wires)
https://i.imgur.com/QKAN3Ep.jpg
Then I striped the ends of the individual wires and soldered the wires to make single ends
and fitted them into a large terminal block I had hot glued to the side of the power pack.
Black Neutral, red 5v, yellow 12v & orange 3.5v and a spare N bridged from the main N
terminal to an end terminal just in case its needed for the 3.5v.
https://i.imgur.com/wC9Kpaj.jpg
https://i.imgur.com/fA6j5kU.jpg
I then Bridged three terminal blocks one 12v (yellow), one 5v (red), one black N (neutral) and fixed them to the board to
give more power outputs so I can add more usb hubs when needed
https://i.imgur.com/SRxyTxE.jpg
The next thing I did was bridge the fuse on a 4 port 5v powered usb hub at the moment
has its own power adapter but will be powered from the terminal.
https://i.imgur.com/2DIHLQO.jpg
Blue 10 port usb hub. this hub is the one to chose for the job.
Needing to get a good flow of power to the bi-fury's was next.
I directly soldered onto the power points on the blue 10 port hub and bridged the 5v points to each
port & bridged the trip fuse.
https://i.imgur.com/I8qpxcu.jpg
https://i.imgur.com/jMihKOQ.jpg
I am running minepeon on a raspberry pi so I also added heat sink to the Pi by sawing an old
pc heat sink to the right size and fixing with heat sink compound.
The raspberry pi has its own power adapter.
https://i.imgur.com/WjBMV5x.jpg
https://i.imgur.com/0LW4FAG.jpg
Fans are needed as bi-fury's get hot.
There are two fans for the bi-fury's, they have their own power supply
(an old 12v adapter for scanner) at the moment but will be powered from the power unit when i get a fan controller.
One is for cooling the pi and the other two are for the bi-fury's.
Plus there are three usb cables with the red wire snipped so there is no power passing through them.
An ether-net cable if you don't use Wi-Fi.
https://i.imgur.com/FtB2dKZ.jpg
8 red bi-fury's 5 ghs each 40gh total they don't all flash but they do hash.
I have zadiged them and tweezered to update firmware.
http://c-scape.nl/bi-fury/bifury_upgrade.pdf
https://i.imgur.com/6QPZelC.jpg
raspberry pi running minepeon BFGminer 3.10.0
the whole lot put together runs well 40 - 42 ghs
https://i.imgur.com/tL62Kvf.jpg
bfgminer version 3.10.0 - Started: [2014-09-24 15:13:29] - [ 3 days 23:48:40]
[M]anage devices [P]ool management
Connected to stratum-lb48.btcguild.com diff 32 with stratum as user /////////////////////
Block: ...a51d3b9d #322934 Diff:34.7G (248.1Ph/s) Started: [14:59:58]
ST:18 F:0 NB:578 AS:11 BW:[ 52/ 39 B/s] E:206.73 I:24.24uBTC/hr BS:5.7M
8/16 57.8C | 42.49/42.56/40.29Gh/s | A:102001 R:451+45(.40%) HW:127338/3.8%
--------------------------------------------------------------------------------
BIF 0: 53.1C | 5.37/ 5.42/ 5.24Gh/s | A: 13131 R: 55+ 5(.35%) HW: 8421/2.0%
BIF 1: 47.5C | 5.24/ 5.25/ 4.83Gh/s | A: 12332 R: 59+ 4(.40%) HW: 31511/7.5%
BIF 2: 46.5C | 5.34/ 5.35/ 4.95Gh/s | A: 12547 R: 57+ 7(.41%) HW: 18137/4.3%
BIF 3: 49.5C | 5.52/ 5.53/ 5.15Gh/s | A: 13148 R: 56+ 8(.40%) HW: 25041/5.7%
BIF 4: 48.6C | 5.17/ 5.17/ 4.89Gh/s | A: 12271 R: 57+ 7(.44%) HW: 17822/4.3%
BIF 5: 46.3C | 5.12/ 5.13/ 4.97Gh/s | A: 12575 R: 55+ 6(.41%) HW: 8507/2.1%
BIF 6: 57.8C | 5.28/ 5.30/ 5.16Gh/s | A: 13073 R: 58+ 5(.40%) HW: 5472/1.3%
BIF 7: 53.2C | 5.41/ 5.42/ 5.10Gh/s | A: 12924 R: 54+ 3(.39%) HW: 12427/2.9%
--------------------------------------------------------------------------------
I have a few errors I am trying to fix.
I have probably missed something being a bit of a newb, but its giving me the 40 gh that I wanted.
I hope this is helpful in solving the power problem with multi port usb hubs and their adapters
for powering ASIC block erupters .
Dave.
Any donations will be gratefully received. --> 1PWfcDuMKFvyKYNyC3Ka9F8We9tV9kg8NM