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81  Economy / Digital goods / WTB Eve Online Plex on: February 10, 2013, 02:20:22 AM
Want to buy eve online plex
Prefer escrow

Make me an offer via PM! Smiley
82  Bitcoin / Hardware / Re: Mobile car-based mining operation entirely possible on: December 26, 2012, 05:46:50 PM
I read a little while back that idling a modern car typically uses 0.2 gallons/hour.  So, if you consider that the minimum, then you're looking at at least $0.70/kwh.  It is possible to achieve full draw on an alternator at idle, so I think it is reasonable to assume you could get 700w out of the car at idle.  There would be a nearly negligible increase of load on the engine.  $0.70 / 700w = at least $1.00/kwh.

If you upgraded your alternator to allow for more load, then you might need to also increase the default idle speed to ensure the engine does not stall, which would mean more fuel usage.

EDIT:  Now if you're talking about running it on a car that is moving, I'd say the electricity is virtually free.

Extending on that, you don't want to run your car at idle for power generation - you want to run it at the peak torque RPM most probably, very often something like 1800RPM-2200RPM. Larger the engine, lower this is.
Also, the typical car here consumes more like 1.5L/hr, so more like 0.35gallons/hour, and at 1800RPM you are probably looking at 0.5-0.6gallons/hour.
Car engines are not designed for low load constant speed - you need to increase the load ie. alternator capacity and utilization dramatically to get the best out of the engine, even at 1800RPM low load you are running perhaps 2% efficiency, while a traditional, older car engine could reach 20%.

for thought experiment, let's think about a modified engine JUST for this purpose.
Turbocharged engine, with mild cams for lower RPM peak output (Where you want to run, or close to it), running lean -> slightly below stoichiometric value (Complete burn, slightly more air into engine than required for complete burn). This kind of engine could reach upto 30% efficiency.
Now we can calculate from energy content and alternator efficiency.

http://en.wikipedia.org/wiki/Gasoline#Energy_content_.28high_and_low_heating_value.29
13kWh/kg or 9.7kWh / liter.
Let's assume we tune this engine for 30kW load, this means we need to burn 100kW worth of electricity, dismissing alternator disefficiencies. After alternator efficiency we get perhaps 27kW of electricity.
That means just more than 10liters per hour.
Please note: I chose 30kW load as load is required for something of that displacement to get to good efficiency rates, even 30kW might be far too low, but let's give it a chance for being tuned for this usage.
At the gas rates like here 95E10 going for about 1.5€ per liter = 15€ per hour and we get under 0.5€/kWh efficiency.
The remaining 70kW could be used to heat your house, or alternative methods used to collect electricity from it. But even at 100% efficiency in all parts it would still cost 0.15€ kWh which is more than double what i'm paying locally right now.

When you are moving it's not free either, but small load disappears in to the existing inefficiencies, 20RPM lower idle RPM don't matter. Even if you are going highway, and trying to get best MPG possible, it will show up there, but it's marginal.


Teal: Big Diesel has higher efficiency than tiny 4 banger. Diesel as a fuel has higher efficiency from chemical to kinetic energy.
Reason tiny 4 bangers gets so high MPG is because they are lightweight and small surface area, not exceptional engine efficiency.
For a gasoline engine 25% is pretty much the norm efficiency rating, depending upon how modern it is.
Many of the tiny 4 bangers getting huge/good MPG (80s-90s Renault Clio, 80s Peugeot 205, Subaru Justy, 80s Nissan Cherry) actually has kind of low efficiency engines in them. They are simply lightweight cars. Subary Justy actually has 3 cylinder engine in it, 1.2l carburated, very peaky output, very low torque at low rpm, even normal driving requires some 3k rpm yet even 4WD on during winter you can achieve better MPG than many big cars. Summer and no 4WD it can achieve 50MPG.
83  Bitcoin / Hardware / Re: Mobile car-based mining operation entirely possible on: December 26, 2012, 05:30:46 PM
Can a car battery provide 120W constantly? Won't that burn out your alternator?

That's just 10A. Many modern cars need that for ignition alone, and performance cars may require double that for fuel pump. Racing cars might require 40A just for the fuel pumps!
Even 80's corollas have 55A alternators. Getting a alternator rewired for higher amperage is not even very costly, just make sure the alternator controller is able to work with the increased amperage.
Friend had 110 or 120A alternator on his M3 for the audio setup.
And that's just those cars which aren't especially power hungry ... Let's enter the SPL competition scene: These guys might be consuming 20kW ...

Hell, just last week i sold one amp with 4x30A fuses and rated RMS power of 5000W to 1Ohm (very short peak).
84  Economy / Securities / Re: ASICMINER: Entering the Future of ASIC Mining by Inventing It on: December 26, 2012, 04:56:00 PM
been away from bitcoin stuff for a few months, and lots happened Sad
GLBSE ... *sigh*
and some securities asking real life identifying informaiton - No, i'm not going to be sending a copy of my driver's license to some random person overseas. I don't like inviting up identify theft Smiley

Finally did like week ago to fill the information form @ GLBSE.

Hopefully everything gets sorted out for Asicminer. i purchased quite a bit of asicminer!
85  Other / Off-topic / Re: Upgrading jalapeno to little sc preorder? on: October 29, 2012, 06:24:55 AM
that is a long time, hopefully i now get a reply Smiley
i emailed them again about my order
86  Other / Off-topic / Upgrading jalapeno to little sc preorder? on: October 28, 2012, 12:05:44 PM
I asked them via e-mail on how to do this but yet to receive a reply - so how to proceed?
87  Bitcoin / Hardware / Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com on: October 13, 2012, 01:10:58 AM
what bad things?

I have used them for various things over the years and I have never had a problem with downtime. Godaddy used to be a pain with certain things because of their proprietary system makes certain types of web site setups difficult to setup - however they have improved it significantly over the years. Personally I have never had even one of my godaddy sites experience any kind of down time and I have several.



GoDaddy was supporter of SOPA, they only backed out of it because of the huge backlash.
As a hosting professional for 12-13 years now, GoDaddy is in my books one of "those trendy, fashion things", not necessarily good, but it's trendy "because everyone has it".
That being said, it's better than most of the large webhosts, like dreamhost and bluehost who oversell like crazy, provides practically no support.

If i were you i'd choose a cloud and operate a VM from there, which constantly, via secure tunnel, backups the DBs etc., maybe in a master<>master config.
Then again, i don't do that myself, i'm perfectly happy with simple DDoS protections etc. basic stuff for a dedicated server. almost no downtime during couple of years to speak of.

NEVER EVER go with bluehost or dreamhost.

Yes, i know, i'm again late to the party! grr
88  Other / Off-topic / Re: Now open: ##bflusers on freenode on: October 05, 2012, 02:19:03 AM
I use home server + irssi Smiley
but ZNC is better for many.
Since our chan is on freenode too, i guess i'll join to idle in ##bflusers as well Smiley
89  Other / Off-topic / Re: Butterfly Labs invests heavily in high speed production equipment on: October 05, 2012, 02:02:10 AM
you got the newsletter too Smiley
they sent it to me many times Sad

Cool looking equipment tho! and posting it all with the cool pictures and all is a cool marketing "gimmick" Smiley
90  Bitcoin / Hardware / Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com on: October 05, 2012, 01:34:01 AM

Domain btcfpga.com has exceeded the max emails per hour (23/20 (114%)) allowed.  Message will be reattempted later


Sounds like a major headache for you right now.
If you need to sort out your IT contact me and let's get it handled properly - the way you want it Smiley
Whether just getting you the e-mail server you need, or maybe you want a fully redundant setup for the shop too, i can help you.
/end shameless advertisement

You really should get those limits sorted out. Then again, even i don't send that much e-mail as we use ticketing Smiley
91  Bitcoin / Hardware / Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com on: October 02, 2012, 12:21:49 PM
The very first bASIC order is #266, the next one in line after that is #269 and then #273

273 being mine! Tongue
was wondering how high was my order, was hoping to be first to order bASIC Cheesy

EDIT: Yeah were a bit late to the party, i usually catch up now and then and just got angered by the continuous drama (AGAIN). I hate seeing it, i'm here for information, not drama Smiley
92  Bitcoin / Hardware / Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com on: October 02, 2012, 12:03:35 PM
FFS GUYS!
Stop the stupid drama already, that is so freakishly unprofessional it's unimaginable!

Makes me want to stay away from BTCFPGA Products, a little from BFL products too! Guys, time to grow up and even try to act like professionals. just try even.

Cablepair: If you feel that strongly, open a lawsuit for slander, or vice-versa but keep the drama off the public.

I'm sick and tired of seeing this drama wasting space in every 2nd thread, and makes me want to keep off the forums all together and just forget about products of EITHER company for being so unprofessional.

Inaba: You might be posting as Inaba, but we all know you work for BFL, you are *ALWAYS* representing BFL. Act like it. Otherwise you are going to loss significant business for BFL. We had this happen, we had a dramatic character in our team and we lost a deal which had a potential for more than 7k € PROFIT PER month as a direct result.

Both: Ignore each other completely if you must, or ignore the remarks. Just try to act professional.

*END OF RANT*
93  Bitcoin / Hardware / Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com on: September 30, 2012, 12:14:28 PM

Also I have some other really great news.

We originally commissioned to have two nearly identical boards designed, one with enough ASIC chips to equal 27Gh/s and another board with the same setup except to accommodate twice that number of ASIC chips or 54Gh/s


After going over the financials today I think it makes sense to change the 1069.99 unit to the 54Gh/s model and sell the design originally intended for 27Gh/s at 599.99

Which means if you currently have purchased a 27Gh/s model it is now a unit capable of a minimum of 54Gh/s


Wow! Immense Cheesy
Count me in for more orders soon Smiley

Now after you get the device finished if you guys could also design and mfg a case for it too as accessory, that would be sweet! Wink
Potentially someting which not only looks cool but allows good cooling as option, ie. adding a fan say 80x80 low rpm low wattage one.
94  Other / Off-topic / Re: [EDIT: NEVERMIND] First picture of BFL ASIC? on: September 22, 2012, 10:57:49 AM
well here you guys go:

95  Other / Off-topic / Re: BFL single - temp vs throttle on: September 18, 2012, 08:29:44 PM
mine are running at 54-56c oO;
the default 832 firmware.
96  Bitcoin / Hardware / Re: ModMiner Quad High Efficiency FPGA Bitcoin Mining Devices 840Mh/s BTCFPGA.com on: September 15, 2012, 11:53:49 AM
bASIC product details do not mention power supply, only DC barrel connector in the specs.
So do i need to acquire separately a power supply and connector?

Or is there even the barrel connector supplied with the device so i can easily hook it up to any power supply providing sufficient 12VDC?

It would be really nice if bASIC is just as finished product as BFLs are, ie. everything supplied in a case + fans, just plug it in.
97  Bitcoin / Mining speculation / Re: Is mining bound to be impossible once all BTC's are being circulated? on: September 13, 2012, 09:06:34 PM
My pool pays out transaction fees
recently the income from TXN fees has passed the income from the NMC side of merged mining
ppls still asking pools to MM, surprised there isn't more demand for TXN fees to be paid out
a whole Namecoin block is worth 0.0921BTC currently
in the last 24 hours we have had blocks with 0.0245 - 0.6110001 in txn fees with them and this is on an upward trend.

these are not "new fees" to be introduced, they already exist Smiley

and these fees will continue to increase as BTC gains value and smaller and smaller sums are being transmitted.
Besides, 0.611BTC is more than 6$ at this moment! Sure it's still farcry to the over 500$ value of whole block, but it's worth a small meal still!

Businesses like Paypal lives on transaction fees. We pay enough transaction fees each month that we could hire another person with the transaction fees alone.
98  Bitcoin / Hardware / Re: [DB.RCLMR] DeepBit "Reclaimer" ASICs on: September 11, 2012, 11:09:08 AM
1U and 2U rackmount case hardware is *EXPENSIVE*, with 3U you can still use standard heatsinks etc. Maybe with some luck some models on 2U.
A proper low height heatsink is going to easily cost 60$ alone.
Then add a properly sized PSU there, and your 750W Corsair is starting to look cheap.
Then for lower height you need to use smaller diameter fans which are by ORDER OF MAGNITUDE less efficient, infact, in modern 1U server the biggest electrical expense can be at times the fans!
Because adding depth to fan is not efficient, but a must do in small diameter, and to drive sufficient airflow you need to spin it at really high rpm these fans can  use considerable amount of electricy to even reach half of what an 230mm fan @ 2.5W can do. Some say these might use even upto 10-15W *EACH* and you need like 4 of them (that's why they are also RPM controlled)

Since depth of a rackmount chassis is not set you can make half depth chassis, and you can load any rack in standard setup DC from both sides, mount them from both sides and drive the hot air to the center of rack for gravitational dispension of heat by rack top ventilation hole, creating a natural rack zone hot and cold aisles Smiley
How well it works depends on the DC, some DCs don't have hot and cold aisles, others does. I would use one without hot + cold aisles for this setup other than which sucks hot air directly from top of the rack and keeps everything else cool Smiley

Ofc, to get it to work efficiently you need fill up the whole rack, which means that even on 42U rack you need 27 (1 slot for the switch) of these, or atleast near so putting separator plates makes sense Smiley
That's 75600$ investment per rack for a total of 2.16TH, at a operating cost of roughly 500€ a month depending upon location, electrical rates etc. plus network capacity. many DCs include 10-100mbps with the rack, not really free but "cheap", and backup connection probably will cost about 30-40€/mo for crossconnect + 50-150€ a month depending on provider, how low they are willing to go.

If someone wants a low cost location for several Us we should have spare capacity in near months
99  Other / Off-topic / Re: [Announcement] Butterfly Labs on: September 11, 2012, 10:43:35 AM
oh, so much useless drama
100  Bitcoin / Hardware / Re: ModMiner Quad High Efficiency FPGA Bitcoin Mining Devices 840Mh/s BTCFPGA.com on: September 03, 2012, 11:08:11 PM
I really don't understand how you can have faith in BFL, who are making highly doubtful claims, but are not believing a single word of what cablepair says. Really, if he never talked about having a prototype you would believe him?! But because he says he has one he has to show it?! Why? You don't get a single piece of information from BFL, yet you are ordering products from them.

+1 imaginary friggin' big number Smiley
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