30 days 12.93686804 LTC 0.35149470 BTC 34.18 USD
Am I missing something? (using 330 kH/s)
Your hashrate estimate for Block Eruptor mining scrypt is slightly off. Its not 330 KH/s . More like 0 KH/s. Using this more accurate estimate, i would assume your litecoin calculator should say. 30 days 0 LTC 0 BTC 0 USD |
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Famous moment in the history of Bitcoin: BKKCoins hopping around his workbench. Makes me think of Archimedes running down the street naked.
Maybe in the history books BKKCoins will have been hopping in the nude.
thats exactly what i thought when i read his post. |
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According to this 4. is true. since all he does is bundle up wires of same color into a single connector. He specifically states that bundling up wires from different rails is fine. 4. Doesn't matter. You can join up any wire from anywhere as long as its same color. |
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1) and 3) are true.
What are you trying to power that uses more than the ATX standard? A 6-pin is rated for 75W, and an 8-pin is rated for 150W. The only difference between the two? A 6-pin has 3x 12V lines, and 3 grounds. A 8-pin has 3x 12V lines, and 5 grounds.
So if you're using an 8 pin, all 12A are split over 3 of the 8 cables, giving you 4+A on each wire. They can handle that no problem, so what are you doing that pulls 4+A per wire?
Say if I want to power 9 50W devices which need 12v. My PSU has a single 12v/40A rail. In this case the 6/8 pin connectors are not enough since i need 9 of them... I would need to use up all the cables... Just me procrastinating for future use, when i get some klondike boards to mine with. The options are either use ATX PSU that way I can run raspberry pi and usb hubs off the 5v supply also. OR get a 12v only power supply (ive seen many 12V 50A supplies on the net), and figure out the 5V separately. |
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Say i need to power a 12V device using ATX PSU. And i have doubts that the wire will be able to support the current needed (i am sure that the PSU/rail can). Can i join in multiple +12v and ground wires into bundles to distribute resistance?
i.e. strip 2 yellow cables, and join them both to the +12v connector on my device, and 2 black cables to the ground lead on the device.
Which of following is true.
1. You dont know what ur talking abt ur gonna burn your house.
2. Its fine as long as you bundle up wires from the same bunch of cables. (Usually PSU has like 4 or 5 bundles of cables coming out)
3. Its fine as long as you bundle up wires from same ATX rail.
4. Doesn't matter. You can join up any wire from anywhere as long as its same color.
In other words, is it safe to join all the black cables to one place, and all the yellow cables to another place and distribute from there without needed any capacitors, resistors, etc ...
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@tiros
somme of us are planning to watercool our XX bitSUPERBurnner.
we just need opurtunity to OC. You can choose, do it or not.
That is OK, but will burnin implement such a solution. These chips are not sophisticated or even tested like GPU and CPU's are. They were just marked as passed, and no extensive testing was made. I am skeptic about durability of those chips, and assume that chips life span would be shorten drastically if we would overclocked them or increased voltage. Of course this is not my field of expertise and feel free to correct me anytime you want. 1 GH/s today is probably worth a lot more than 1.1 GH/s a week from now... So factor that when talking about shortened lifespan. I am probably fine with 10% increase in hashrate which halves the lifespan... Didnt do the math yet... The rate of increase of wear to the OC'd capacity needs to be measured and can only be done with prolonged testing... I guess if you can cool it fast enough, it should be fine. |
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If its a rack case, take out the guts, put in a raspberrypi or something. fill em up with ASICs and host it at a datacenter.
For an old server, especially if its rackable one, the only thing of value is the case (and fans and maybe PSU).
I have a 1U dell poweredge collecting dust...Too noisy to be put near living humans. Will probably re-use the case...
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Low priority feature request: Have some kind of identify command. Issue this command to a running/idle K16 to make its led blink in some pattern. I think cgminer has some provision for this.
There is already an Identify command, and all commands trigger an LED blink, though not in some pattern - just about a 1/4 sec flash. perfect |
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Low priority feature request: Have some kind of identify command. Issue this command to a running/idle K16 to make its led blink in some pattern. I think cgminer has some provision for this.
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If it's a standard 0402 cap, if one specific manufacturer part on one vendor runs low or out, there are 5-10x other vendors with the same part, and probably another 10x manufactuer parts (each listed on the vendor sites) that will work
Derp. Thanks. I feel a bit silly now. :-p In the case of caps and resistors I put part #s mostly just as example. For the most part I didn't select specific ones based on extended criteria, other than sometimes choosing low ESR, or appropriate voltage rating. The inductors tend to be more specific since the DCR is directly linked to efficiency. The ICs obviously tend to be very specific, though maybe some parts have second sources that would work. some updates from the i2c front (a little bit technical):
...
I will forward the i2c code now to bkkcoins.
Thanks! Awesome. Nice! where does the serial number come from?
Each PIC is programmed with a serial#. This can be automated with the Microchip Hexmate utility. Since there will be multiple vendors I'd suggest something like taking the high 8 bits as a vendor id and maybe I'll keep a register so that serial # ranges don't overlap. The only real use of the serial# is so that I2C slave arbitration is ensured that any slave has a priority when enumerating so that each one gets a unique address. Question: Is the PIC firmware flashing possible at runtime? I.e. using the USB connector? Or would it require un-soddering the PIC and hooking it to a programmer? The reason to ask is i would ideally like to be able to change the serial# to include information about the boards position in the cluster. |
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Since when is a heatsink not part of a PCB assembly design?
Sure but a heatsink is kinda useless without a working circuit to generate the heat, this thread is focused on the first step, comparatively the heatsink is easy. You seem to expect more than R&D in an R&D thread, there is nothing for sale yet here. Most assemblers are offering heatsinks, if you want to assemble yourself try to buy from one of the assemblers. Heatsink : https://bitcointalk.org/index.php?topic=208381.0It's not the design, it's the sourcing. Of course getting all the circuity going is critical. But if you find out you can't get a heatsink for 2 months, you're screwed I'll work on it this weekend, maybe even setup a group buy or something this is supposed to be a DIY project, (saying a critical component has to be bought from an assembler?) The heatsink doesn't need much specifications. Just get a heatsink of about the same size (or bigger) . Look earlier in the thread for positioning of the mounting holes. Goto some workshop with CNC machine, and have them drill the mounting holes needed. Buy thermal pad 10cm x 10cm seems to be a common size perfect for K16. Mount, screw,  , profit. |
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turtle83;15;1.29;14ru6sM4aHxeJ3PicewsMvaJpSpAHb7vyq "I hereby announce my endorsement of Zefir for president of United States" - Paid for by Turtles for Zefir IO/Q7OtbvPbhnsfSwETcBKMknH0iMoN4y8fXwrFoxbXB0nZOvDKs0GWJQwyHFrQHp4EzD2N5DCpkN4i0akf5hLU= |
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Thinking about posting a picture of the test rig, but it is a truly horrible mess of wires.
I don't want any of you to think the end-product could look even remotely similar to that thing.
Porn hardly ever looks like the real thing  Yeah. just post it already, im ready to fap. |
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*****
K16 took me 6 hours to populate by hand and is about to go into the oven after I run a couple oven tests. Jeez, there is a lot of caps on that board.
Good Luck BKK we anxiously await your results!!! All the best! |
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The 6 pin PCIE cables use 3 x 12V lines, providing 6.25A and a a maximum wattage of 75W. That should allow 2 devices to be powered per cable using a splitter.
Also, how many amps does a K16 use?
You should expect around 40W (3.3A) . It probably will use less. Using the max ratings for regulators, under a condition of over clocking, you could probably draw up to 55W (4.6A) beyond which it would be dicey and shut down should occur if the regs are doing their job. Off hand, I didn't go check at what rating the shutdown kicks in. This is allowing an approximate 75% for regulator inefficiency but actually hope we get better. The PCIe connectors are actually rated at 13A per pin by Molex and I guess the PCIe spec takes a pretty conservative approach. If you used sufficient wire thickness to avoid heating I think whatever your PSU is capable of could be split onto multiple boards. Most PSU have pretty hefty 12V rails available between PCIe and Molex. You can likely even find 24pin mainboard adapters letting you use that source as well. I think I've seen something like that on ebay. The cheap Molex-PCIe adapters tend to use wire that is a bit thin so you wouldn't want to split twice with those. I have a single rail 650 watt OCZ PSU ( http://ocz.com/consumer/psu/zt-series-550w-750w-power-supply/specifications). It only has 2 PCIe outputs. Using the proper guage wire, can't I just chain splitters to run multiple K16 boards? How many boards do you think I could run off each PCIe output? 8??? I'm trying to figure out how this can be done and what gauge wire I need to use. Your wire should be able to handle 3.3A times the number of K16s u feed off it. So to feed 2 K16 the wire should allow for 6.6A . There are many resources online which gives conservative estimates of how much current can be safely pushed. I particularly like this one - http://bit.ly/183bHf4Also, in spite of having single rail, it is possible that the PSU is not designed to push all the power thru one connector... As long as the wires are not the limiting factor, if you overdraw then modern PSUs would auto-shutdown to avoid damage. |
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How long would a Block Erupter last at 100% uptime ? (without cooling)
Been 4 days continuous since my last cgminer restart. Even before that the restarts were not due to errupters. 3 units. ~3% error rate. No fans. 2 of them are one above the other, very close. Those 2 have slightly higher error rate than the other one. |
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ziplock the usb and chuck it into the freezer, get a cheap laptop and connect it via cable  Nah risk of condensation. Mineral oil emersion! and run the oil the thru a heat exchanger which is placed inside the freezer... |
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Nobody has found a way to overclock these things. Atleast publicly. Also i think thats not possible without hardware modifications.
The only thing better cooling does is reduce hardware errors, this increasing the effective hashrate... Your error rate is already below 1%. I doubt you can get significant gains by running it cooler. The only advantage of such heatsink mods is they potentially increase the life of these devices. Also the geek factor.
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