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Showing 20 of 23 results by duncangray
Post
Topic
Board Group buys
Re: [OPEN][EU]CXMining R1: Gridseed LA5U 5-chip Dual Miners 0.39 btc
by
duncangray
on 04/03/2014, 19:36:18 UTC
Can you cancel my two, I'll be getting them elsewhere.
Post
Topic
Board Computer hardware
Re: Avalon 60 GH for sale + 2 * U1 Antminer
by
duncangray
on 21/02/2014, 20:37:12 UTC
I've decide to stick it on ebay

http://m.ebay.co.uk/itm/360865842568

Starting at 99p

:-)
Post
Topic
Board Computer hardware
Topic OP
Avalon 60 GH for sale + 2 * U1 Antminer
by
duncangray
on 20/02/2014, 16:26:28 UTC
Sensible offers hopefully :-)
Can deliver next day delivery to mainland UK.
I've never go it to run at 60GTH eligius normally reports about 50th.
Alternativly its going on Ebay it was my first bit miner, I also have a couple of Antminer U1 that I might sell individually or include with the avalon if its a reasonable price.
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Topic OP
Antminer S1 - Temperature Cut off script
by
duncangray
on 20/02/2014, 13:59:49 UTC
Hi Guys,

I've written a temperature cut off script for the ANTMINER S1

It may not be perfect but I was trying to keep it as light weight as possible.

Try it yourself I have uploaded it to

https://github.com/DuncanGray/cgminer-tools

If you like it or have suggestions let me know.
If you really like it send me a tip :-)

14qF1hj3SxAzyWkCxrkgSYPikM7faKqKAV

All the best
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Re: 4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 17/02/2014, 10:47:56 UTC
I have one fan setup as they come out of the factory, But then I have another fan at the other end pulling air out.
It seems to work quite well at the moment between the 4 i'm getting around 800gh and they are running cooly.

I've added an extraction fan to the room which is then pumping the air into the coolest part of the warehouse, its a bit noisy but people are appreciating the extra heat.  The 4 ants are using about the same wattage as one of our electric heaters, so I'm basically getting paid for some of our heating bill.

Excellent today another difficulty increase :-)
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Re: 4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 15/02/2014, 12:35:58 UTC
I'm running this from a ware house so I have fitted a heat extractor for the room.
I am curious though do a lot of people run multiple units from home? As then I would see there be an issue with overloading your house supply?
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Re: 4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 15/02/2014, 12:29:21 UTC
Fortunately, its 240v and its a 30amp circuit.
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Re: 4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 14/02/2014, 18:57:30 UTC
Funnily enough I was taking some old servers apart yesterday to see what PSU were in them, I haven't managed to figure out the wiring on them yet though as they are hot swappable PSU's
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Re: 4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 14/02/2014, 18:27:19 UTC
I've had one of the stock fans fail.
Yes I had read they could cope with more then the 750 so they are within operating limits with the 4 ants.
I'm drawing 1680 Watts at the wall according to my monitor.

As they don't keep the ants cool enough even running at 190-200 gh they are only at about 34 with the new fans, I run two fans in case one cuts out, thus the ants don't cook them selves.
Also i'm not to sure how reliable they are, I've chosen a fan that I know is regularly used on servers and has a good reliability track record.
Post
Topic
Board CPU/GPU Bitcoin mining hardware
Topic OP
4 x Antminer S1 on 2 Corsair PSU with uprated fans.
by
duncangray
on 14/02/2014, 15:51:37 UTC
I thought it might be good to share my experience of what I feel is improving the design of the S1 Antminers.
This is my first parse, I'm already revising my design to mount both fans on the front.

At current they have a front and back mounted fan. 

The fans are Nidac 12v 2.7amp Beta V. I use two fans per ant miner to keep them nice and cool to add a level of redundancy in case of PSU failure I run the fans in two banks each powered of a cheapish PSU in my case some old cool masters that I had around.  I chose the p1 and p2 connectors that can supply enough amperage for the fans.  Thats the main thing with these just make sure they are attached to cables that can take the power 12v * 2.7amp * 4 = 129Watts per bank.

http://www.netring.co.uk/content/images/fans.JPG

My ants are running at around 190-205gh each and are staying around 33ish degrees which I class as a win.
Powering the fans direct off a separate PSU drops the drain on the main corsair 750 I'm using, this is what I believe allows me to run two ant miners off of one corsair 750 PSU.  At the wall they are drawing about 1600 Watts, which is a little over what the PSU are rated at but they are running cool.  Obviously try this at your own risk!

http://www.netring.co.uk/content/images/ants1.JPG

What I want to do is build an alert system in on fan failure, I'm probably going to do this with two parses, step one possibly a basic amp meter on the fans which switches of the related miners on a failure.  Long term I might rig this up to a raspberry PI so I can monitor them remotely and get alerts.

If anybody is interested or done anything similar I would love to know?

Also if any body wants to send me a tip because they think its a good idea they can to
14qF1hj3SxAzyWkCxrkgSYPikM7faKqKAV


Post
Topic
Board Service Discussion
Re: New Mt Gox Press Release - Feb 10 - they are claiming flaw in bitcoin protocol !
by
duncangray
on 10/02/2014, 11:13:48 UTC
I think people that get freaked out about the fluction of the bit coin have quite a lot to learn, all currency values fluctuate due to daily activities.
So there has been a bit of bad confidence but when the issues are sorted then confidence will improve and the bit coin will strengthen.
At the moment it gives people a chance to buy bit coin at a reduced rate.

I noticed another online electronics retailer(www.aria.co.uk) started accepting the bit coin today for payments so if anything I would say acceptance is gathering pace.
Post
Topic
Board Group buys
Re: [OPEN][EU]CXMining R1: Gridseed LA5U 5-chip Dual Miners 0.39 btc
by
duncangray
on 06/02/2014, 17:38:20 UTC
Where are you in the uk?
Post
Topic
Board Group buys
Re: [OPEN][EU]CXMining R1: Gridseed LA5U 5-chip Dual Miners 0.39 btc
by
duncangray
on 04/02/2014, 22:44:16 UTC
how many kh do these produce for script mining? if its reasonable I will start with 2.
Post
Topic
Board Hardware
Re: [ANN]ASICMiner Publicly Looking for Potential Customers/Partners for New Chips
by
duncangray
on 04/02/2014, 17:25:16 UTC
Same question, what is the smallest purchase size/quantity?
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 29/01/2014, 10:29:47 UTC
I just wanted to say thanks to Sushi!
My miners turned up Monday :-)
I sent a pm but one of the fans is quite noisy(I'm also getting HW errors 205 over a 1 day period) I'm not sure if you have any recommendations, at first it wouldn't spin, now it does I think possibly the bearings are a bit funny, not sure if you are able to send a new fan or possibly on my next order.



Thanks
Duncan.
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 23/01/2014, 22:47:52 UTC
I've created a myUPS account, I'm not sure what I an do to get the tracking.
From what I can tell they seem to want a reference or code?
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 23/01/2014, 22:38:52 UTC
I don't as of yet can you get one if you are i the UK?
Thanks
Dunc.
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 23/01/2014, 22:23:06 UTC
Hi,
Do you know anything about paying the customs fees etc?
It's being delivered to my office so i would like to pre pay the fees in case i'm not in as even thought there will be someone to take the delivery there may not be someone to pay the fees if I'm not about.
If i could get tracking beforehand maybe I could pay online?

Thanks :-)
Duncan.
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 21/01/2014, 20:52:20 UTC
so if I have ordered via sushi-review this will be on the 23rd shipping?
Post
Topic
Board Group buys
Re: [GROUP BUY 7 OPEN] Antminer 180GH @ 1.90 BTC - Chinese End of the Year Sale -
by
duncangray
on 21/01/2014, 20:01:23 UTC
Hi Sushi,
I've have PM'd you about my order a few times sorry.
Any chance of an update on shipping times etc?
It just says processing on sushi-review.com
Again apologies for being a pest I know you are busy :-)
Duncan.