Topic: Klondike - 16 chip ASIC Open Source Board - Preliminary - page 166. (Read 435369 times)

http://www.hammondmfg.com/dwg25.htm  


Key Features:

Shipped knocked down - for handling ease and protection.

Easy assembly & dis-assembly

Uses all machine screw & PEM nut construction, perfect for applications where repetitive assembly and disassembly are required.

Light weight design - all aluminum, type 5050 H32 for easy modification. Example: the 19" rack mountable enclosure (RMCS190313BK1) - weighs only 5 pounds (2.3 Kg).


Strong design construction using:

0.125" (3.2 mm) thick - side panels & rack mount brackets
0.064" (1.6 mm) thick - front & rear panels
0.062" (1.6 mm) thick - top and bottom panels

Can be used with or without rack mounting "ears" or brackets (included).
For replacement panels link here to our RMCP series
Enclosure is finished in rugged, satin texture, black powder paint
Includes top, bottom, side panels, front & rear panels, rubber self adhesive feet, rack mount brackets and all hardware
Link below for more information on our chrome pull handles (not included with unit)
Easy access to inside, only 4 screws need to be removed from any of the 6 panels for internal access.
Internal aluminum chassis panel is optional (see below)
For an extruded aluminum version of rack mount enclosures - link here to our RM series. http://www.hammondmfg.com/RM_U.htm

Even if you are not in Asia, but you want your chips sent to someone in Asia to be assembled, then you save on shipping costs. It's a long way from China, to Europe or the United States, then to Indonesia or Thailand, then finally to you.

Of course, you could get the chips sent to yourself, then order the boards and other parts separately to be also shipped directly to you. You'd do the assembly. That would be the most economical (not counting the value of your time.)

Board mostly designed, waiting on docs for data protocol info and pin outs. Expect a couple days after docs for first version to factory - hope to verify power before ordering first main board. I'm doing small tweaks each day as I find things to improve. Will throw up a revised 3d render soon.

Firmware started. Have set up and compiled the USB stack and I'm adding cmd protocol code. Temporary hold there while I do this power board.

No samples known to have been shipped.

I have some test stuff ordered and have almost finished a small test power board for seeing how the power supply functions alone (same layout) before using it in the main board. Will order that soon and put in an initial order for prototype parts. That means I can't program and debug a chip for at least another week or so (shipping time).

Thank you to those who have sent me donations.
I sold some of the bitcoins and I'm ordering some more stuff today.

Very interested!!!,

How much work is still outstanding on getting this board fully designed and tested?

Are you still waiting on Avalon to make available documentation and reference board? They said beginning May it would be released?

Avalon also promised that the sample chips will be available 4 weeks after order. Zefir (for one) ordered a batch in April, has anyone been able to get their hands on these chips yet?

What did you have in mind here? I have the PIC with temp sensor inside and was planning to add an external thermistor near one of the ASICs. I haven't placed it yet because I'm waiting on Avalon docs to sort the pins I'll use for it, and then one left over will go to sensing the thermistor. Also, one more to disable the clock or 1.2V power, unsure which method yet.

http://www.aliexpress.com/item/Genuine-licensed-Oc3-ice-copper-ram-heatsink-box-graphics-card-ram-heatsink/683305103.html

Would these be practical possible for heatsinks?

Small quantities are always expensive because you're eating a fixed setup cost across a tiny # of boards.  Usually for digikey/mouser component i provide them a BOM and they order the parts and roll it into their quote.  For other parts (like the Avalon chips) you just provide them with them

I will get a tiered quote after avalon releases their specs and a PCB design is good to go, but assuming 16chips per board, I'll be getting a few dozen boards just myself, i expect the setup costs will not be a significant per-PCB-assembly cost.

For someone like me grouping up to get the boards assemblied isn't a significant cost savings, but it absolutely is for someone trying to get, say, 3 boards made for 48 chips.  You may end up paying more for the fixed costs than for the Avalon chips.

I'm only getting 38 chips so just 2 k16 boards and 5 kNanos(BUMMs) for me
[I'll keep one chip as a mememto]


Whenever we are ready to buy the boards from Bkk I am in.
And I will jump in with anyone in the states that gets a fab group order going too


I forget if Bkk wants chips or BTC as tips, I can go either way with that too

Any ideas how much they charge to build 1-3 boards?
Does your local manufacture supply parts for the build?

I don't plan on organizing anything on the forum or any shipping, but I will very likely having this PCB assembly (or one 99% similar but perhaps with a small design change to add parts for temp monitoring/etc)  pick & place / reflowed with a local manufacture in WI that i've worked with in the past with good results.  My goal is to get them up and running ASAP after receiving chips.

 Just throwing it out if anyone in the region would be interested in doing a local group order to save money.

It's a good idea in general, communicate and meet up locally and get the boards built.  You could easily spend more downtime on shipping everything there and back then on the actual assembly itself, and it always introduces more risk and middlemen.

And with a local place you can always ask them to build up 1-3 boards, test them, make sure it's all good, then do the rest.

Ya... I think that larger solution be cheaper right?

I think something for everyone here. Straight up aluminum extruded passive heat sinks with fans at the ends like Avalons is one idea... maybe when packing these boards together the VGA idea might also be better depending on the heat generated with so many boards so close raising the ambient around them. I just think the VGA heatsinks are available already in large quantities and proven.

Be good for people to post up ideas for this and drawings so we can bounce ideas of each other as we have so much time to work this out. We might find some great solutions for various configurations.

Better we support BKKcoins rather than go off with someone like that right... basically just sponging or scamming. If we are all working together to help BKKcoins get his board made, tested then again at the right time we can all group buy to lower the production run and kick in for BKKcoin for his design and work etc if he is interested in that. I think there are many of us here all willing to trust in BKKcoins so if we do this all as one large group buy we are likely going to get the best price possible anywhere.

We should all be looking locally to scrounge up facilities to fab the completed boards I think. So find a reputable reflow / smt shop. I for one would like to see that BKKcoin is compensated fairly for all this work so that we as a group kick back every-time we use his board design. I don't the guys running that page above are interested in doing that or they would be here at least contributing to the discussion.

Being open source is the best thing for the community but that doesn't mean it is free or something we should just go alone on as a group we can really lower our costs and probably beat competition out there. Thanks again BKKcoins for doing this and everyone else contributing to this. If we keep supporting this project I have little doubt it will work. This is how a real community should work not trying to profit off others work but rather supporting the developer and working out how we can best help all of us get a working rig in as many hands as possible.

I'm working on a solution to modify 4u racks to hold 8 boards with intake/exhaust fans. 90x90 heat sinks would be ideal, but 4 smaller ones would work as well.

yes very likely

https://bitcointalksearch.org/topic/cheap-chinese-vga-coolers-ftw-70043 VGA Coolers... if anyone finds a good heatsinks sized right with fan enclosed it might be the ideal solution. Low profile and it can move the heat.

What would we need?

Extruded passive / forced air Al heat sink design no fan
http://www.meccal.com/en/pdf.php?id=148
http://www.conrad.com/ce/en/product/188557/Extruded-heatsink-100-X-100-mm/0205043

Bonded copper fin vga heat sink forced air with pipes with fan
http://www.frozencpu.com/products/image/6324/vid-95_2.jpg/c

Extruded forced air heat sink with fan.
http://www.generalnanosystems.com/fan-vt-hdc-502a-bl.html

Specs:

Footprint: 100mm x 100mm contact plate or less?
Profile: Embedded fan countersunk to the heat sink profile?
Airflow: 45cfm?
Noise: 18dBA, ±10%?
Fan speed: 2000rpm, ±10% x 2?
Fan size: 9cm?
Lifespan: 30,000 hours
Fan connector: 3-pin?
Color: GOLD of course?

Thoughts?

Seeing that we might even be able to find older configured VGA heatsinks with fans for this purpose it might be the ideal profile for mounting in a rack configuration.

I've seen that.
I have been contacted by them but I have no idea who they are or if it's a scam or real.
I don't mind if they want to sell my stuff, but I have no connection with them and at this time there is nothing to sell. Yet.

DABS? If you are in ASIA?

Or can you start your own group buy? I might be interested in helping you with that.

AKA BUMM's oh you know that is gonna stick.

SCAM possibly.

terrahash looks dodgy
I hear alarm bells going off. the site is shit slow as well