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1161
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Local / Other languages/locations / Re: Wanna help with Bitcoin in Africa?
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on: June 24, 2013, 07:09:15 PM
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Bitcoins in africa.. Uhh shouldnt we work on getting them food first?
It's not "this OR that", it's "let's do all that we can at the same time!". A widespread use of Bitcoin in Africa will help solve some of the problems. Not all. It will, by the way, help with several problems associated with "getting them food there" too ;-) Ente |
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1162
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Bitcoin / Hardware / Re: Klondike - 16 chip ASIC Open Source Board - Preliminary
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on: June 24, 2013, 12:12:49 PM
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Any additional work on overclocking makes no sense in the circumstances where difficulty increases 20% every 2 weeks. All your overclocking gain will be immediately negated by difficulty rise.
Also, any component price increase, gaining their larger availability, is more than welcomed. Think about how much you will lose if you have to wait for any of the non-mass available component, or ship them from a far source. This is a real danger with a K16 PIC.
Just my 0.00000002
Huh? Even when we have a 20% diff increase every 2 weeks, we still have those 20% gain on hashingrate *forever*! As long as we start hashing at the same time, ideally shortly after receiving chips, we gain. If we were to wait 2 weeks longer because of implementing the overclocking, it equals out for the output . But still raises the resale-value of the miner. As I said, I believe OC-capability will be a major deciding factor, quicker than we assume! Ente |
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1163
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Bitcoin / Hardware / Re: Klondike - 16 chip ASIC Open Source Board - Preliminary
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on: June 24, 2013, 08:22:24 AM
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I am an engineer with a background in aerodynamics/fluids and am capable of performing Heat/CFD simulations. Is there any way I can contribute to the heat sink/dissipation design. I can't promise anything but I can try if I had more understanding of what the goals/design are.
Awesome! :-) Quick question about watercooling: How about building a simple aluminum "box" from 5mm aluminum, no fins or similar, and screwing the K16s on that? We could use both sides of the cooler and it would be pretty easy to build. I guess even with a low waterstream it should cool the board enough? Cooling the water with a big radiator and a fan, outside, 35°C outside-temp worstcase. With a few dozen watt per 100cm² this should be a piece of cake for the actual cooler? Your gut-feeling is enough for me now :-) (Else we might migrate to the K16 DIY thread) Ente |
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1164
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Bitcoin / Hardware / Re: [REFERENCE] Klondike DIYers Thread
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on: June 24, 2013, 07:08:41 AM
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I'm not sure how this would be faster or more accurate than hand-placing with tweezers.. This "just" kind of removes one of the axis when placing the parts, but looks so much slower? But then I never placed lots of tiny SMT parts on a board. Ente |
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1165
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Bitcoin / Hardware / Re: Klondike - 16 chip ASIC Open Source Board - Preliminary
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on: June 23, 2013, 10:43:51 AM
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My personal oppinion is that you should consider the overclocking in this stage of development and change some elements on the fly if needed for K16
I agree to look at overclocking headroom early. I believe the most important factor in deciding which avalon platform to use is which one is available first. Then, immediately, comes which platform can overclock. This would even be more of a priority than the price for the board, as the chips are a lot mor expensive and the platform will cost in the same ballpark. You people know how fast time runs in bitcointalk. I don't think a lot of avalon-miners with no overclock option will be sold just one month after first shipment. BKKCoins, many people would go insane in your position. Hats off to you for staying sane! :-) Ente |
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1167
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Local / Biete / Re: [Sammelbestellung] Shirtoshi
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on: June 21, 2013, 01:45:09 PM
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Nach so langer Bedenkzeit eine kleine Änderung:
yossarian/runbtc/L/1
(Also nur noch ein Shirt).
Fand den Badger eh bescheuert. Honey badger don't give a shit. Ente |
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1169
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Bitcoin / Hardware / Re: [Klondike] Case design thread for K16
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on: June 20, 2013, 11:20:13 AM
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I am surprised to see so many push pull fan setups in a closed case. If the pull fan sucks out more air than the push fan pushes in, the air pressure will be low in the case and there will be less air molecules to pickup and transport the heat.
I expect a push only fan setup to be much better, there will be lots of air molecules to pick up the heat and the air has no way to go except out.
Maybe even forcing a high pressure in the case by limiting the outgoing openings of the case. For example a 12cm fan blowing towards a 8x8 cm opening with smooth transition. I would like to use 12cm, so the board is 1cm away from the housing, creating some airflow over the remaining electronics on top of the board too.
In theory, you are right - a gas will have less molecules per volume at less pressure, and we need as many molecules to transport that heat away as possible. However, the kinds of fans we are talking about have very, very low "pressure" or "pull". We are not talking "vacuum cleaner" here, we are talking "to fan with a sheet of paper". Which means that 1) the "pressure-reduction" *any* fan-setup can archieve is very small. I would guess less than 1% reduction in pressure, molecules, heatcapacity. 2) The volume throughput will go down very quick, as soon as there is the slightest resistance for the fan. Meaning if the fan-datasheet states 100 cubic-something per minute, it will be reduced to 90 by just blowing into an empty case with a large hole at the opposite side. I would guess in real setups you have anything between 80% and 25% of the stated "free-running" air-throughput. Now you can have more throughput with two fans. And push-pull helps more with the resistance-issue than it eats through the molecule-density-issue. By some magnitudes. Also, there are axial and radial fans, the latter with way higher pressure. Ente |
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1170
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Bitcoin / Hardware / Re: [Klondike] Case design thread for K16
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on: June 20, 2013, 10:53:22 AM
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Need some help, When i downloaded the files from https://github.com/bkkcoins/klondike i converted the KiCad file to vrml and later to sldprt(Solidworks part) and that looks like this http://imgur.com/Fg3O9kn which look good but there is two problems, the file is close to 100MB which is very large for a CAD file and it is laggy to work with it, and i can´t edit it or measure it. From the pictures I´ve seen in this thread it has been very few of the components on the PCB, where did you get these "more simple" files, could someone send it to me(i would prefer a sldprt file) or give me the measure of the PCB on some of the components. PCB card, 100mmx100mm height=? Diameter of holes and how far the holes is from the edge of PCB? The length,height,width and position of the rest of components(chips etc) Another question, How do i connect/power the Klondike to a computer, could it be USB, and which software does it use(is it just plug it in and mine or do I need to configure something?) VMRL import in SolidWorks is okay for basic components, but doesn't manage complex assemblies well. You may have better luck with the scanto3D plugin (which is what I used). You'll need a ton of RAM to import the full K16 model, I think I topped off at ~6GB. Here's a link to the sldprt file of the bare board with no components: https://www.dropbox.com/s/ks2hh709gpppx5d/K16-PCB-bare.SLDPRTI believe the part is actually 1.6mm, rather than 2mm as marto stated - at least as per the VRML file that Bkk provided. It makes little difference either way. Do I understand this right that the PCB is 1.6mm thick? Ente |
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1171
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Bitcoin / Hardware / Re: [CLOSED] Avalon ASIC chip distribution
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on: June 20, 2013, 09:21:52 AM
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lumix1991;-100;-8.60;12drGmcWLMCyiSetQUaMMddwY6QGDBoGVp
HHAhuMeUwY9goSYOiDDBkB5nocsj2aBEGny0Gg+ZHD4kDNaIbviRdmxeusavCll/OSSpjtuel48gkFuTFgxFWc0=
Thanks!
..if you try to buy chips: Groupbuy is closed since May.. Ente |
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1172
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Local / Deutsch (German) / Re: Raub bei Tauschaktion Cash gegen BTC, User "Tallos" überfallen
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on: June 20, 2013, 06:57:20 AM
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+1 zu so ziemlich allem gesagten!
..Sowohl von den "unglücklichen Einzelfällen" in den Mühlen der Exekutive, als auch zu +1000 Udo Vetter, als auch zu "warum so viele da auftauchen".
Völlig OT, aber völlig richtig.
Tallos hat sich seit seinem Post zu seinem Überfall nicht mehr blicken lassen, vor 9 Tagen *schulternzuck*
Schade, der "3 Avalons aus Holland"-Thread hat länger gehalten! :-)
Ente
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1173
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Local / Biete / Re: [Gruppenkauf] Avalon ASIC Chips (SebastianJu) Batch 6: 863 ASICs weg 50863 sold
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on: June 19, 2013, 01:58:16 PM
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Heute war ich praktisch nicht im Forum/Thread. Ursache war dass ich durch halb Deutschland nach Bayern fahren musste und erst jetzt wiedergekommen bin. Ich habe dort die Firma besucht die die Chips importieren wird, habe mir angeschaut dass alles passt und einen Vertrag gemacht um alles abzusichern. Außerdem habe ich mir vorher vom Avalon Support die Erlaubnis eingeholt die Adressen für die Batch-Bestellungen nachträglich zu ändern. Das macht der Support jetzt auch hoffentlich schnell. Damit wird der Import jetzt schneller und ohne Probleme von Statten gehen. Außerdem wurde mit der Firma ausgemacht dass, für den Fall dass die Einfuhrumsatzsteuer entsprechend hoch wird, die Firma Rechnungen über die zu zahlende Einfuhrumsatzsteuer an die einzelnen Käufer schickt. Der Fall tritt aber, wie gesagt, nur ein wenn die zu zahlende Einfuhrumsatzsteuer entsprechend hoch ist. Für den Fall mit einzelnen Rechnungen für die EUSt würde ich noch Rechnungsadressen und eine Emailadresse zum zuschicken der Rechnung von allen Teilnehmern im Gruppenkauf einsammeln. Momentan 268 Teilnehmer. Erstmal wird das aber noch nicht nötig sein da ich bei avalon ein ticket offen habe in dem ich dahingehend nach genaueren Details frage. Sollte Avalon nicht reagieren werde ich Yifu noch einmal anrufen, falls das auch nicht helfen sollte würde ich vorsorglich Adressen einsammeln, nur für den Fall. Besser so als unnötig hinterher warten zu müssen. Es geht also voran...  Klingt super! :-) Ja, so eine Lösung finde ich um welten besser als es "auf eigene Faust" als Privatmann zu versuchen. - D.h. ich kann weiterhin vorab schon dir Euros zukommen lassen, um alle zusätzlichen Kosten (Zoll, Versand etc) abzudecken? - Wenn meine Vorab-Zahlung reicht, bekomme ich demnach sofort die Chips, ohne "Anschrift, Mail, Rechnung" von der Importfirma? - Warten alle so lange, bis der Letzte seine Euro-Rechnung bezahlt hat? - Auf welchem Wege kann ich dir Euros zukommen lassen? Gehen auch Bitcoin? Dankeschön, und weiter so! :-) Ente |
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1174
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Local / Biete / Re: [Sammelbestellung] Shirtoshi
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on: June 17, 2013, 05:43:41 PM
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Ente / runbtc / S / 1
Ente / badger / S / 1
Ente / BTC / S / 1
Hooray, Klamotten ohne Klamotten kaufen gehen zu müssen, bezahlt mit Bitcoins, abgeholt zu lecker Burger!
Ente
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1175
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Bitcoin / Hardware wallets / Re: [PREORDER] Trezor: Bitcoin hardware wallet
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on: June 17, 2013, 01:50:17 PM
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*edit* maybe the next step for you guys is a hardware devise for merchants which they can use to protect them selves from devises that look like trezors but are actually not.
It would be a second computer, with a limited interface to the main/cash/online computer. This second computer does nothing than create a transaction, let the Trezor sign it, verifies the signature, and sends it to the main computer. Sounds totally 'spy vs spy', and indeed makes sense! Could be a tablet phone/computer with USB-OTG, and a softwaresolution. Throw NFC and a QR-receipt-printer at it for good measure. I like! Ente bitpop: You are spreading FUD. |
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1177
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Bitcoin / Hardware / Re: AVALON DIY, ASSEMBLERS AND RETAILERS
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on: June 16, 2013, 10:34:03 AM
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After all the scams, drama and fights I saw in the bitcoin community, you people and BKKCoins restored a lot of my hope in humanity.
The work BKKCoins is doing is astonishing. He works for weeks and months in *all* of his available time on this project. The demand for this is crazy, and still he publishes everything in public. Even before producing the first device himself.
Only few people would be capable of providing the quantity and quality of his work. Only few people would be brave and visionary enough to gift all of this work to the community right from the beginning.
I have no words to formulate my respect and gratutude to BKKCoins.
I see a large commitment from the community in this project as well. Many are helping out in the development thread, be it with ideas and wishes, proofreading and bughunting, sending parts and equipment.
There are a lot of donations.
Producers and distributors are publicly stating how they will share profit with BKKCoins.
No, not every single person will give back enough to BKKCoins. But I am sure the gratitude of the community will put a smile on a lot of faces.
This is going down in history, gentlemen. BKKCoins already is a hero.
And we, all together, will make this story one of the biggest success stories of Bitcoin so far, period!
Let's do this right! I want to see a storm of donations, chips and postcards flooding BKKCoins!
Thank you! :-)
Ente
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1179
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Bitcoin / Hardware / Re: Klondike - 16 chip ASIC Open Source Board - Preliminary
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on: June 16, 2013, 10:09:49 AM
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I currently have about 6mm space along top and bottom because the corner holes are there.
The first metal exposed on the holes is at 2.8mm from edge.
Stacking/mounting hole centers from each corner are at 5mm, 5mm and dia. currently 3mm.
Holes centered between ASICs are at 18.5mm, 22.5mm same 3mm dia.
See diagram posted further up for layout.
You could probably use a VGA heat sink mounted under each quadrant of 4 ASICs. The total size covering 4 ASICs is 28mm x 25mm.
The Mask gerber was the one I needed. Tried using Kicad first, but it didn't have any export options. Got it now. 100 x 100mm board, 90 x 90mm mounting holes spaced 5mm off board edge and 55 x 62mm heat sink mounting. Perfect!
I am toying with the idea of a quad mounting bracket.
Uhm, if the ancient post from BKK is still right, I come up with 55x 63mm.. Does this look right?  Ente |
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1180
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Bitcoin / Armory / Re: Armory - Discussion Thread
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on: June 14, 2013, 03:42:54 PM
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Ah yes. Armory doesn't support compressed keys, yet. They were going to be supported with the new wallet format, but that got put on hold for obvious reasons. Once RAM-reduction is done, maybe I'll finally be able to finish that.
Until then, Armory can't handle compressed keys. At all.
Good, it's no news then! Maybe put some hint into the error message? "Error importing.. invalid.. maybe compressed?" So people don't throw away good keys or similar. Nah, probably not important at all. Cheers! Ente If you look at the code, I do have a condition that warns about compressed keys... but I guess the "This number is too big" warning somehow takes precedence. So I had thought about it... I guess I just didn't do a good job https://github.com/etotheipi/BitcoinArmory/blob/master/qtdialogs.py#L2427..one of the things I love about how you work - you look forward and solve possible obstacles before anyone comes up with them! :-) Ente |
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