wasnt end of may the wonder date? 
Topic: [Work in progess] Burnins Avalon Chip to mining board service - page 152. (Read 624205 times)
still not selling wasnt end of may the wonder date?
wasnt end of may the wonder date? 
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.
Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
just read OP?
Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
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.
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.
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 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?
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 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?
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 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...
The table in the first post of the thread linked below shows "November" as lead time for BitBurners.
https://bitcointalksearch.org/topic/mining-equipment-manufacturers-209750
It's a mistake, isn't it?
https://bitcointalksearch.org/topic/mining-equipment-manufacturers-209750
It's a mistake, isn't it?
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.
about the cooling system...
can we order only heat sinks, and not fans? will that be cheaper?
can we order only heat sinks, and not fans? will that be cheaper?
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.
The table in the first post of the thread linked below shows "November" as lead time for BitBurners.
https://bitcointalksearch.org/topic/mining-equipment-manufacturers-209750
It's a mistake, isn't it?
https://bitcointalksearch.org/topic/mining-equipment-manufacturers-209750
It's a mistake, isn't it?
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 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
It is correct.
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 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?
Burnin is there a way for you to create a stencil for this PCB for us DIY guys so we can apply solder paste through the stencil. This would make it much easier for those that want to assemble there PCB's themselves. I have 750 or so chips coming in and this would make it much easier.
My manufacturer doesn't use stencils for the solder paste.
But there are a ton of laser-stencil services out there where you could order your stencils online and locally.
The pad count is close to 2000, its not going to be cheap.
And 341 Parts per board is not for the faint of the heart either.
I'll see if I can find a stencil maker that gives discounts on larger quantities, but don't get your hopes up.
So when one orders a couple of miners and supports the needed chips one will get a miner with cooling solution. What exactly has to be provided on top to make it work? Cables to stack the miner? PSU? Notebook/Raspberry Pi? What exactly do i have to buy on top to make this work?
I'll include one micro-usb cable per 16 boards, the stacking cable has to be bought separately though.
(But I recommend to just DIY, its easy)
Whats needed:
- Power supply that provides 12V (Standard-ATX, Brick, other)
- something that can run cgminer. (Computer, RaspPi, Wifi-Router, NAS, Laptop)
- Stacking cable, if using more then 1 board
- Cool place to put the boards, where no one runs into or steps on them (would hurt more then lego!)
I am thinking about an optimal solution right to build these.
With 16 pieces, it will be impractible to use a single PSU concerning cables. Will there a solution using a Power Supply Board? I was thinking about a Board similar to enterpoints one?
I was thinking about this:
http://enterpoint.co.uk/wp-content/uploads/2012/07/Power-Distribution-Board-650x404.jpg
In fact, you could probably use exactly that one, if I am not mistaken. However, for custoemrs from Germany like me, it would be nice to have a board like this prebuilt. The other solution is in fact getting a PSU that has a very high number of modular slots or daisy chaining the 12v. I am careful about daisy chaining 12v cables nowadays
Im using these for my ztex boards : http://www.cardreaderfactory.com/shop/atx-to-lancelot-power-adapter.html
Basically u hook in atx to it and you have 20 pairs of 12v contacts, and bonus some 5v ones which i currently dont use, but will use to power USB hubs, raspberry pi.
Yeah, getting a german version would be easier for me though. I know blackarrow delivers, but it is a pain in the ass for me to buy in China.
If someone has a blackarrow order open in Germany, let me know, I want one of the power boards.
SebastianJu check this one: https://bitcointalksearch.org/topic/m.2424435 burnin didn't updated OP.
Looks good this way...
I was thinking it would be better to flip them upside down from the rendering since heat rises. Not sure how much it would matter though.
SebastianJu check this one: https://bitcointalksearch.org/topic/m.2424435 burnin didn't updated OP.
When i see the first picture in first thread: https://bitcointalksearch.org/topic/m.1875862 it looks to me like the cooling isnt very effective. I mean the fan is pushing air into one heatsink and the other space is free air. That means the air will go mostly the easiest way and that isnt the heatsink. Wouldnt it be better to stack 2 miner together so that their heatsinks are together. A pack of 2 miners. This way the air could be forced into the heatsink and the air dissipation would be ideal. All air has to go through the heatsink then. Of course between the 2 of those stacked miners the pcb shouldnt contact then.
Another plus for doing so would be that only one fan for 2 miners is needed.
Am i wrong anywhere?
Another plus for doing so would be that only one fan for 2 miners is needed.
Am i wrong anywhere?
I was considering the same concept just a little while ago. Except I thought 4 miners configured "box" style all heatsinks facing "inside" with 1 fan, or 2 (push/pull 1 on each end).
See here:
https://github.com/bitcoiner49er/Bitburner_Quad
Heatsinks are obviously customized
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