[Work in progess] Burnins Avalon Chip to mining board service

[dddbtc]

I paid for 20 batch 1 zefir chips and had them sent to you and paid assembly.  Order #824 I've sent you an email as well.  Please answer my questions when you have the time. Thanks!

contact: dddbtc (at) gmail (dot) com

burninmining.comm account name: dddbtc (at) lavabit (dot) com

[Coiner.de]

I wonder what would be the risk when a psu has for example 400W at one 12A line and i would power one board directly and 3 others with cables? I could use 3mm speaker cables if that helps...

You risk that the weakest part melts.
The power for the 3 others has to go through the PCB from the direct connection to the green terminal then.
burnin already recommended to only connect two boards and use solid wires. I would just follow his recommendations.

[alexuk]

order 737, no tracking or email yet, status still showing up as processing on the account page

Was with Zefir's batch 1...

anyone else in the same predicament?

[Fizban]

order 737, no tracking or email yet, status still showing up as processing on the account page

Was with Zefir's batch 1...

anyone else in the same predicament?

But you was late claiming your chips from Zefir and so you probably have to wait for batch 2, as your chips was given to ppl from batch 2.

[alexuk]

order 737, no tracking or email yet, status still showing up as processing on the account page

Was with Zefir's batch 1...

anyone else in the same predicament?

But you was late claiming your chips from Zefir and so you probably have to wait for batch 2, as your chips was given to ppl from batch 2.

Zefir confirmed I'm in batch 1, I made it in time

[paul3]

I could use 3mm speaker cables if that helps...

speaker cables are not solid. Non solid cables are not allow in lustre terminal.

You can get solid copper 1.5mm2 cables  in every hardware store (Baumarkt) very cheap.

I ordered this one from amazon.de: H&G Erdkabel 3 X 1,5 10m

[g83]

Das kannst Du dann schälen :-)

[burnin]

I wonder what would be the risk when a psu has for example 400W at one 12A line and i would power one board directly and 3 others with cables? I could use 3mm speaker cables if that helps...

You risk that the weakest part melts.
The power for the 3 others has to go through the PCB from the direct connection to the green terminal then.
burnin already recommended to only connect two boards and use solid wires. I would just follow his recommendations.

I wrote it in red and bold, USE SOLID COPPER WIRES

updated status of all orders shipped now.

@BenTuras were you able to get the CAN to work now?
you have to state the number of miners in cgminer correctly.
It must be maximum number of boards in cluster x2.
And i would also suggest setting the fan control target temperature to 45°C.
This is for a stack of 8:

Code:

--avalon-options 115200:16:10:50:256 --avalon-temp 45

[alexuk]

got my confirmation - units on their way! yay!

[maxmint]

What's the meaning of the different colours of the blinking LEDs?

[nekonos]

Hello,

when it is expected that the project will be open source?

Cheers

[BenTuras]

@BenTuras were you able to get the CAN to work now?
you have to state the number of miners in cgminer correctly.
It must be maximum number of boards in cluster x2.
And i would also suggest setting the fan control target temperature to 45°C.
This is for a stack of 8:

Code:

--avalon-options 115200:16:10:50:256 --avalon-temp 45

Yes, I got the can-bus working with the termination installed on both ends of the bus.
I am running cgminer 3.3.2 without any options.
All board are blinking red/green/orange and are hashing like never before ;-)
Temp is 47/48 degrees C on cgminer.
8 boards produce around 42GH/s.

:-)

[kano]

I wonder what would be the risk when a psu has for example 400W at one 12A line and i would power one board directly and 3 others with cables? I could use 3mm speaker cables if that helps...

You risk that the weakest part melts.
The power for the 3 others has to go through the PCB from the direct connection to the green terminal then.
burnin already recommended to only connect two boards and use solid wires. I would just follow his recommendations.

I wrote it in red and bold, USE SOLID COPPER WIRES
...

Question regarding that, that hasn't been mentioned.
If you are powering more than 2 of them through one power source, you are also running that current through the input voltage section of each of the boards.
Thus I imagine that could damage the boards also ... ?
i.e. really, don't do it with more than 2 ... ever ... for that reason also?

[fasmax]

I would only connect one board with the solid copper wire.
So one of every 2 boards has the main power connected.
Also make sure the connections are tight.
Lose wires could cause the connector to melt.

[burnin]

Now that the boards are for sale is the schematic going to be released? I know it was mentioned previously in the thread but haven't seen them yet. I think having them to look at may answer a lot of questions.

I cant quote burnin directly right now, but his statement towards this question was that he will release them after a reasonable profit was made.
Burnin surely had a lot of work done and needed to invest which should at first returned bevor releasing those data.

I will send out BOM, Stencil-Gerber, drawings and Pick and Place data out to those who have ordered blank PCBs next week, under NDA.
That NDA basically reads: do not redistribute until i open source the project on delivery of the first BitBurners. (5th to 6th of august.)
Unfortunately only a few will get PCBs from the very first batch since i received more chips from Zefir then anticipated.
More PCBs are on their way but will take at least one week longer then the first. (12th to 16th)

Have you send? Nothing in my Inbox.

Did you pay that order?

Question regarding that, that hasn't been mentioned.
If you are powering more than 2 of them through one power source, you are also running that current through the input voltage section of each of the boards.
Thus I imagine that could damage the boards also ... ?
i.e. really, don't do it with more than 2 ... ever ... for that reason also?

The tracks between the 6Pin connector and the screw-terminal are rated for the current of two boards. 

[northcape]

My batch #1 order is still processing even though you stated that all batch 1 and some batch 2 orders have shipped.
Could you please look into my order?

[Fizban]

My batch #1 order is still processing even though you stated that all batch 1 and some batch 2 orders have shipped.
Could you please look into my order?

Did you fill out Zefir's website with information about you chip order?

[SebastianJu]

I wonder what would be the risk when a psu has for example 400W at one 12A line and i would power one board directly and 3 others with cables? I could use 3mm speaker cables if that helps...

You risk that the weakest part melts.
The power for the 3 others has to go through the PCB from the direct connection to the green terminal then.
burnin already recommended to only connect two boards and use solid wires. I would just follow his recommendations.

I took solid as stable and not static and i still wonder whats the difference. In theory the size of the copper inside tells how easy the electrons can wander inside. So i cant see what difference would there be.

When i think about the setup with the cables... connecting a second board this way would mean that the power would flow completely through the first board until it goes to the second one. In case i overclock the first board would have to take up to 200W and the second 100W. Burnin mentioned that some parts regarding the voltage already is at its limit with such high overclocking/overvolting. So would this setup not be possible for overclocking or are there no parts involved that get at their limits with that overclocking?

[fasmax]

I think it's solid core vs stranded wire. Its just a recommendation by burnin.
I think you are much more likely to get a good connection using solid core wire.
If it were me I would try and use 12 or 14 gauge solid core copper wire if it would fit into the connectors.

[m5]

When i think about the setup with the cables... connecting a second board this way would mean that the power would flow completely through the first board until it goes to the second one.

No, it doesn't flow through the entire PCB and its power conveter circuits. It will flow just through the PCB traces between the PCI-E connector and the green power connector. As burnin states, these few cm of traces between those 2 connectors are rated for the current of 2 boards (1 non-overclocked board about 40W, so the traces are rated probably for 80-100 W at 12V, which would mean 6-7 A).