Not sure I like this idea.  Lots of cheap board places offer fixed sizes, once we exceed 10x10 the price will go up.

eg. http://imall.iteadstudio.com/open-pcb/pcb-prototyping/im120418009.html

Actually I think it would be smart to fund a run of two layer sample boards so that the assembly can be tested early.  This would allow us to build mechanical prototypes to check the heatsink attachement etc.  Bkk send me a PM if you want me to help with this.

Is this Colin Fitzgerald you're talking about?   I emailed with him a few weeks back about a small personal run of these boards.  He'll be at Vancouver Mini Maker Faire in early June, seems to know his stuff.

Great progress, thanks!

Perhaps you should consider taking on a partner for the software work so you can focus on the electronics?

I haven't seen much on heatsink selection recently.  I'm wondering about the hole pattern and which heatsink it is designed for?

If possible, it might be worth putting 5 holes per quad (outside corners and center).  Those of us using heat pads will benefit from the compression. This would also allow people to use 4 heatsinks instead of 1.

You might also consider taking the design to a fab shop and getting DFM feedback on stuff like component clearances etc.

*edit* actually, thinking aloud, it is worth buying some other random chip in the same package as the avalon and having a run done to check on issues like this?

Vancouver BC hère, 32 chips am interested.

Border should be easy but don't DIY commercially.

http://blog.openbeamusa.com/tag/stuck-in-customs/

"Free DWG Viewing with DWG TrueView"

Not open source but free (windows only).

http://usa.autodesk.com/adsk/servlet/pc/item?siteID=123112&id=9078813

Me too, all workers running, I could see the estimated rewards struggling to recover after the reset.

18001   2013-05-12 16:34:10   2:41:01   23191072   17134   0.01073682   none   235854   25.41062002    94 confirmations left
18000   2013-05-12 13:53:09   2:05:17   17988057   13340   0.01655230   none   235838   25.26280000    78 confirmations left
17999   2013-05-12 11:47:52   1:42:00   14425095   10472   0.01925067   none   235829   25.39689175    69 confirmations left

To make these posts useful, please post which stratum server you're using.  I was on stratum2, am moving to stratum3.

Cheers,
Tom

There's been quite a lot of talk about the reset being busted before.  Seems to me dividing by a factor would be fairer (and still prevent overflow).

(a bit off topic here)

A lot of the open source FPGA designs have this "feature" too.  It's really dumb - I added stop on end of range to my FPGA code - if my work fifo is empty they stop working, this drops the power consumption and the temperature (and eliminates the wasted bandwidth of reporting duplicate results).

Perhaps the next generation of Avalon chips will improve this.

I think eleuthria has a good point.  It has to start with the code, if the software is stale and not being maintained then I can see why people don't want to build systems that use it.


ps. I'm also down on 17925/235160 (mining at same rate all night PST).  As above, Slush will look after us.

17926    2013-05-08 16:05:44    1:52:00    15071549    12776    0.02157108    235165    25.59585000    97 confirmations left
17925    2013-05-08 14:13:44    1:27:14    11634278    9694     0.00000270    235160    25.21733124    92 confirmations left
17924    2013-05-08 12:46:30    0:01:55    251435      192      0.01888573    235151    25.08370000    83 confirmations left

In for 32.

Final post to escape!!  bye!

Posting to see if this is true

I have 24 FPGAs, each at about 250 M/hash, slush pool currently reports 5816 Mh/s.

Is home built, cost me about $US200 all up but I've only been mining for 6 weeks and the difficulty is killing us all.

Sigh, also stuck...  Been reading anon for a few months, should have posted....

Tom from Canada.

Managed to build a 6000Mh/s system from scrapped FPGA boards, is eating electricity (600W) but I'm working on that.

Cheers,
Tom