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41  Local / Market / Re: GRATIS 2 placi de c1/s3 on: February 01, 2016, 03:52:26 PM
le iau eu
42  Economy / Computer hardware / Re: [WTS] Technobit HEX4M BitCoin ASIC on: January 31, 2016, 08:09:48 PM
would you consider sending board only to europe?
thanks.
43  Economy / Computer hardware / Re: (WTS) Bunch Of Old Mining and Networking Equipment, Accessories, and Other on: January 31, 2016, 08:45:28 AM
is the bitfury stuff sold?
thanks
44  Local / Market / Re: [VAND] Prisma 1.4 Ths on: January 26, 2016, 09:23:29 AM
Din Deva, daca le iei pe amandoua pretul scade cu 100 de lei.
45  Local / Market / [VAND] Prisma 1.4 Ths on: January 10, 2016, 07:02:19 PM
Vand 2 buc Prisma 1.4Ths, racire custom pe ambele parti

Pret fara sursa 400 RON sau 0.20 BTC
Pret cu sursa 600 RON sau 0.35 BTC

Controlere UART-USB incluse

2 buc disponibile
Accept si schimburi gen S5...SP35...Avalon pentru amandoua.

46  Economy / Computer hardware / Re: ALL of my mining gear is for sale on: November 24, 2015, 08:59:33 AM
Would you do 2 boards for 0,5 btc shipped to EU?
If you have other options let me know, thanks.
47  Economy / Computer hardware / Re: [WTS] S5 - S7 - Habanero on: November 24, 2015, 08:57:19 AM
Id be intrested in the habanero, board only, shipped to EU.
Offering 0,3 btc shipped, tell me if you have other options.

Thanks.
48  Economy / Computer hardware / Re: Would like to buy 2 A1 Coincraft Desk Blades on: October 30, 2015, 09:07:05 AM
Yes, sorry, some medical problems.
I have two blades, one, the connector is missing, i really dont know if it works.
The oher has the connector but one chip i desoldered because it was malfuctioning.

The last one most probably works.
if you gine me an address, il send them on monday.

postage i think its about 20~25$. non tracked, may be less.
49  Economy / Computer hardware / Re: Would like to buy 2 A1 Coincraft Desk Blades on: October 27, 2015, 09:29:54 PM
I think i have one or two, dont know if it works, was keeping it as spare.
Postage+whatever you think is fare and its yours.
Im from EU.
Ill tell you tomorrow how many i have.
50  Economy / Computer hardware / Re: [WTS] 5 KNC November Jupiter Boards - For Parts on: October 11, 2015, 06:55:51 PM
Any Chance you have the controller, too?
51  Bitcoin / Hardware / Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) on: October 08, 2015, 12:55:58 PM
Latest build of cgminer, ran them from 100 to 270.

Even at 270 the TPS VRMs have a hard time keeping up @250~260W, also i added a top side heatsink
The blade should be run @200W
Seems like these are build on the limit of everything...chips...vrms...

730mV is still better than 800mV, what is you power consumption @wall? and hashrate?
You could try swaping the 20mhz oscillator with a 10mhz one from a prisma maybe it will help lowering the start of the chips...i dunno.

Ill have more time in the weekend to tinker with the resistors and frequencies.

I dont think error reporting is even in the code.
52  Bitcoin / Hardware / Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) on: October 08, 2015, 09:16:27 AM
I'm not sure what undervolting has been done on Tubes (or BE200 in general) but I was just playing with my Tube test rig a bit and had trouble getting it to see chips reliably below 730mV with a clock at 20MHz. Not sure where the limitation is and I'll keep playing with it until I have a Prisma setup to mess with.

EDIT - of course, it's also possible that it got set to 200MHz instead of 20MHz, given I was seeing 10x% expected hashrate... Let's see where 100MHz starts dropping out.

you have to change the driver-blockerupter.c on line 193
from if (!opt_bet_clk || opt_bet_clk< 19 || opt_bet_clk > 31)
to if (!opt_bet_clk || opt_bet_clk< 9 || opt_bet_clk > 31)
or even 0 if you want to be able to go lower than 20(200Mhz) on the chip.

as described in the driver info->clock = (opt_bet_clk + 1) * 10;
so 20 is 200 mhz on the chip
53  Economy / Auctions / Re: 16 x bitfury H-CARD v1.2, bitfury m-card v2.3, and Lancelot Dual Spartan6 Dev on: October 02, 2015, 10:20:18 AM
0.05 btc for the 2x10 lot of bf cards+mboards.
54  Bitcoin / Hardware / Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) on: September 26, 2015, 07:58:27 PM
If you plan to get rid of the blades(without heatsinks), let me know Smiley
Also let me know what power supply youll be using

For me these come to mind
DPS-1570AB(BB)
NPS-700AB
They are voltage adjustable and hoping they go all the way down to 10V
55  Bitcoin / Hardware / Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) on: September 26, 2015, 07:13:08 PM
Well i didnt have a prisma until recently and never saw a post that gave some undeclocking/undervolting solutions.
The tube is easy to undervolt....Prisma..not so much.

Thought i should share the info, i think there are enough in the wild to be saved Smiley
Ill be presenting the Prisma tower when it arrives and if i succeed in building it.

If anyoane has or knows about a server PSU capable of voltage adjusment to 10.5v let me know Smiley
56  Bitcoin / Hardware / Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) on: September 26, 2015, 07:19:04 AM
Hy, i want to share some opinions i have discussed with intron regarding the undervolting of the prismas.

What he told me is that being a one string design meaning that each row has 16 chips @12V that is 0.75V.

In order to undervolt you would have to come down from 12V to 9...10V that would give 0.65V to each chip.
Also those D15NF10 mosfets act as a shunt when a chip in the string goes bad, alowing the string to keep going,
but here comes the bad news, if a shunt is activated there are 15 chips in the string, that equals to 0.8v/chip...more amps being drawn...

From the pictures and calculations and after doing some numbers, those mosfet are working @20~22A, maximum amperage is 23A
If im right then in all the cases a board caught fire was because of a bad chip going wrong, shunt working and the mosfet exploding because it was to its limit.

Its a good design but poorely equiped.

A question to the ones the board caught fire: Were they powered from Server PSUs?
Server PSUs are known to be more stable on the 12V line, normal ATX would go down to 11.8v or so no resulting in such a bad avalanche heating disasters.

What could work is modding a server PSU to 9...10.5V and powering one blade to see what is the maximum clock it would go and power consumption.
It will make the blade safer and power consumption will go down.
OR
A rectifier 30A diode with a 2.6...2.8V voltage drop on it in series with the whole blade in order for the blade to work undervolted with a standard 12V.
The goal is to make them safer in the rectifier diode situation. Power consumption will not go down so much as the rectifier will dissipate about 50W of heat.


All i said is theory, until my blades arrive and i can send one to intron or test myself.
None of this has been tested or we could be dead wrong about the design.
Please test at your own risk.
57  Economy / Computer hardware / [WTS]Two BeagleBone for Bitmain controllers(EU prefered) on: September 24, 2015, 07:54:46 AM
I have two BeagleBones from S2 controllers.
I have no need for them as they can only be used as Bitmain Controllers or Linux Servers.
They are the stripped down version from Bitmain.

Asking 20$(each) + shipping, im from EU and i prefer EU shipping but i will send overseas if you pay shipping.

Picture below.
58  Economy / Computer hardware / Re: WTS iPhone 4s 16GB Verizon White on: September 19, 2015, 04:53:07 PM
Do you have any on GSM?
59  Economy / Computer hardware / Re: [WTS] Antminer S2, Antminer S3 hashing board V1.4 - EU on: September 16, 2015, 05:30:17 PM
also intrested in the S3 board.
60  Bitcoin / Hardware / Re: [DIY] - Reward $100 | Antminer S1/S3 Blade on Raspberry Pi on: September 14, 2015, 12:59:16 PM
As i said in the post im using these for regulators:
http://www.ebay.co.uk/itm/2pcs-lot-S2-DC-DC-StepDown-Adjustable-Power-Supply-Module-LM2596-/252088850843?hash=item3ab1aa999b
they fit in the squares where you see 12v in ...3.3v out..etc

I saw 3.3v on the pads on the S3 blade, figured it need 3.3v too, didnt think it was a actuall loopback.

Only one side because it will be Home made/self made pcb.

Any suggestions are welcome Smiley
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