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Toolhead
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June 12, 2013, 08:25:28 AM
Last edit: June 12, 2013, 10:17:50 AM by Toolhead |
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The leadtime depends on the delivery of the Avalon chips. As soon as burnin gets them, he can start producing the miners. Capacity will be around 1000 PCBs per week, but can be increased by burnin if necessary.
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tarmi
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Activity: 1218
Merit: 1010
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June 12, 2013, 09:10:04 AM |
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about the cooling system...
can we order only heat sinks, and not fans? will that be cheaper?
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Schrankwand
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June 12, 2013, 10:16:32 AM |
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The lead times there are guesstimates by the author. They have no representation in reality other than guess work. Even if all chips in Zefir's and Sebastians group by were sent to burnin, he could finish the machines, if they were all 20 chip boards in around 6 weeks. That would be 110.000 Chips and 5500 boards. Why? Because he subcontracts manufacturing to a bigger, well equipped company. He designs, builds and redirects to the company. Burnin, you read Tim Ferriss, didn't you? Awesome job on that, actually. So he could just hire a student for shipping and after the design phase be done with it. |
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SebastianJu
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June 12, 2013, 11:09:53 AM |
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I have i question about this image
It shows that the AVALON chips are at the top of the board and radiator is on the bottom. It is correct or a mistake or am I missing something?
The chips put the heat at the bottom. They are designed this way. The pcb itself is a bad heat transporter so in the pcb are vias included that transport the heat through the pcb. Then on the other side the heatsink takes the heat and is cooling the chip. Learned in BKKCoins-Thread...  |
Please ALWAYS contact me through bitcointalk pm before sending someone coins.
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driksson
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June 12, 2013, 12:49:30 PM |
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I have i question about this image
It shows that the AVALON chips are at the top of the board and radiator is on the bottom. It is correct or a mistake or am I missing something?
The chips put the heat at the bottom. They are designed this way. The pcb itself is a bad heat transporter so in the pcb are vias included that transport the heat through the pcb. Then on the other side the heatsink takes the heat and is cooling the chip. Learned in BKKCoins-Thread... Makes perfect sense to me. Imagine replacing one faulty chip, with all that sticky paste to get rid of. This way, they are all easy accessible. One thing i thought of, why dont you have these snapmounts put on the boards? that way we can all mount the chips with our thumbs in each socket. Or will it induce cooling problems raising the chip from the board? |
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jlsminingcorp
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June 12, 2013, 02:39:30 PM |
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I have i question about this image  It shows that the AVALON chips are at the top of the board and radiator is on the bottom. It is correct or a mistake or am I missing something? It's correct. I'm not very familiar with PCBs and how cooling is achieved, but I think the chip will disspipate more heat through the copper/whatev-layer of the pcb to the back instead through the chip (which is mostly plastic/ceramic, I don't really know). Please correct me if im wrong Apologies if this is a silly question, but why not flip the whole board upside down so that the heatsink is facing upwards? This way heat rises away from the board/chips and is taken away by cool air from the fan. As shown, will the heat from the heatsink not naturally rise towards the chips resulting in poorer cooling? |
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flohlie
Newbie
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June 12, 2013, 02:46:58 PM |
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The advantage of heatsinks is, that the heat can spread through the aluminium and then be cooled by the airflow of the fan, and therefore does not have to "rise" upwards ;-)
So i think the effect you mean should be minimal.
The "rising upward" does only appear, when air is heated. It does not occur, when heat is spreading in a soldid material.
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villex
Full Member
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Activity: 154
Merit: 100
Mining hardware assembler and administrator.
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June 12, 2013, 03:29:10 PM |
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Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
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Foofighter
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June 12, 2013, 03:33:33 PM |
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Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
just read OP? |
ex official Canaan Distributor (Cryptouniverse)
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villex
Full Member
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Activity: 154
Merit: 100
Mining hardware assembler and administrator.
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June 12, 2013, 03:36:22 PM |
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Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
just read OP? I should be more specific, I was thinking about possible prices. Thanks for the quick reply. |
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Kiders
Member
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Activity: 98
Merit: 10
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June 12, 2013, 03:36:48 PM |
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still not selling  wasnt end of may the wonder date? |
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Foofighter
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June 12, 2013, 03:45:39 PM |
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still not selling wasnt end of may the wonder date? no hesitation here, he isnt selling until he has a working board. |
ex official Canaan Distributor (Cryptouniverse)
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Lgetty17
Member
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Activity: 98
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June 12, 2013, 04:02:57 PM |
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What's the timeframe looking like these days??
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SebastianJu
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June 12, 2013, 04:04:51 PM |
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Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
Check out my sig... there you can see all options and prices burnin is offering. I believe he sells the pcb only too. |
Please ALWAYS contact me through bitcointalk pm before sending someone coins.
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SebastianJu
Legendary
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Activity: 2674
Merit: 1082
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June 12, 2013, 04:05:53 PM |
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@burnin... i shipped 20 sample chips to you... Ill send you a pm with the trackingcode. 30 samples were delivered... 20 samples are on its way to burnin... Unfortunately i was 2 minutes too late at the post counter so it will be taken tomorrow from that branch. This way sending via express didnt make sense anymore... so it should be with burnin the day after tomorrow... I worked with antistatic workspace and pincette. I really hope i did everything correctly. Ill post later some pictures of the chips. They are really awful tiny. The other chips i will package today after checking back with zefir. |
Please ALWAYS contact me through bitcointalk pm before sending someone coins.
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alexuk
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June 12, 2013, 04:15:19 PM |
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excellent!
please give us updates burnin - i hope all goes well!
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CumpsD
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June 12, 2013, 07:04:38 PM |
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Looking forward to the first tests!
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g83
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June 12, 2013, 07:05:34 PM |
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Hopefully burnin can give us news next week
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jlsminingcorp
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June 12, 2013, 07:46:31 PM |
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The advantage of heatsinks is, that the heat can spread through the aluminium and then be cooled by the airflow of the fan, and therefore does not have to "rise" upwards ;-)
So i think the effect you mean should be minimal.
The "rising upward" does only appear, when air is heated. It does not occur, when heat is spreading in a soldid material.
Sure, I understand the role that the heatsink plays ;-), I just explained myself poorly! The heatsink still needs to heat the air around it in order for this warm air to be carried away by the airflow from the fan. Since the airflow wont be perfect, why fight any natural convection by having the heatsink upside down? I'm sure that you're right, it's not going to be a problem with 40W of power per board, but every little helps right? |
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