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Topic: The Chili – 30+GH/s BFL based Bitcoin Miner Assembly - page 28. (Read 137986 times)

legendary
Activity: 1274
Merit: 1004
Alright, time for the last auction. Let's get these all in homes before Christmas.
https://bitcointalksearch.org/topic/30ghs-chili-miners-fast-auction-50-available-375995
donator
Activity: 686
Merit: 519
It's for the children!
Chili Christmas ornaments.


sr. member
Activity: 280
Merit: 250
Helperizer
An earlier poster was quite right - these are fun and easy to run!

I'm already looking to pick up more.  Any idea if you're going to do another batch, MrTeal?
member
Activity: 67
Merit: 10
News on the Queso Cases...

I'm getting 12 sheets of Acrylic to make my 10 cases (overage for "learning") today... By Thursday or Friday I should be able to show the system and prove that the backer-plate works... (I am waiting for my thermal pad which is in the mail now).  As soon as I can build a chili with the backerplate and get it hashing I'll post pictures and provide more detail.

Until I laser a few out I won't know my laser costs.. but I am targeting $15USD (in BTC) per Clear Acrylic Queso with free shipping in the US and then $22.50USD (in BTC) shipping anywhere else..

Everything will ship first class mail as that's about 1/4 the cost of shipping priority mail.

Anyways, those are estimated pricings.. I'll know more by the end of the week.

(I'll need to order the acrylic on mass so I may see if MrTeal & ChipGeek are cool with me running a group buy for the cases rather than trying to guess how much acrylic to buy and then having left over material).


legendary
Activity: 2450
Merit: 1002
Any idea when firmware will be opensource?!? =)
legendary
Activity: 2450
Merit: 1002
Awesome, thanks for the pic, which heatsinks would well for those areas? links to any would be awesome =)
When I was prototyping I just used these ones since I could get them next day.
http://www.digikey.com/product-search/en?x=0&y=0&lang=en&site=us&KeyWords=294-1100-ND
Two of them are enough to cover all 4 phases.

You can get heatsinks cheaper than that if you don't mind waiting though. I bought these guys as well, and just cut them in half and put both halves on the board.
http://www.ebay.com/itm/Aluminum-Heat-Sink-10pcs-lot-x-150-20-6mm-for-LED-Power-IC-PBC-Module-Transistor-/181132035289?ssPageName=ADME:L:OC:US:3160

Thanks man =)
sr. member
Activity: 267
Merit: 250
Awesome, thanks for the pic, which heatsinks would well for those areas? links to any would be awesome =)
When I was prototyping I just used these ones since I could get them next day.
http://www.digikey.com/product-search/en?x=0&y=0&lang=en&site=us&KeyWords=294-1100-ND
Two of them are enough to cover all 4 phases.

You can get heatsinks cheaper than that if you don't mind waiting though. I bought these guys as well, and just cut them in half and put both halves on the board.
http://www.ebay.com/itm/Aluminum-Heat-Sink-10pcs-lot-x-150-20-6mm-for-LED-Power-IC-PBC-Module-Transistor-/181132035289?ssPageName=ADME:L:OC:US:3160

How important is it to get heatsinks. I realize it's up to the person who is using the devices, but I am getting between 33 and 36+ ghs on my Chilis.  How much of an improvement can I expect?
newbie
Activity: 29
Merit: 0
Thanks PhDminer!
Be careful!! Power supply passed away few minutes ago!! LoL 39GHs may draw lots of W.  Cry
sr. member
Activity: 262
Merit: 250
Thanks PhDminer!
newbie
Activity: 29
Merit: 0
My cooling solution!!

1. Backplate: http://www.amazon.com/gp/product/B004W8AOK2/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
http://ecx.images-amazon.com/images/I/312-Z8M8bZL.jpg
The black rubber looks like shadow. It is rubber sheet for insulation. The steel backplate is very thick and sturdy.

2. Cooler: http://www.amazon.com/gp/product/B005SEZBXY/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
http://ecx.images-amazon.com/images/I/41Un70yxiNL.jpg
This horizontal cooler may be good to chill down MOSFETs.

3. MOSFET Heatsink: http://www.amazon.com/gp/product/B004CLDIHK/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
http://ecx.images-amazon.com/images/I/41py58WVcGL._SY300_.jpg
3M thermal tape is included.

4. Raspberry Pi
No need to describe

No need to buy additional screws. I could attach both of the backplate and the cooler just with screws provided by Cooler Master.

I put all these in my garage, and for the internet connection, installed a WiFi multi-bridge, which transparently connects the Raspberry Pi in the garage to the Verizon WiFi router in the living room. My garage is crazy cold these days so my chilis show about 38GHs at below 60 Celsius degree.


PhDminer, this is cool. Can you show us pics of it assembled? Where the parts go with pics?
5 chilis in my garage.
http://i40.tinypic.com/2m29kev.jpg

One of them
http://oi41.tinypic.com/308ay34.jpg

How to assemble: 1. black rubber pad, 2. 2mm steel backplate, 3. one more backplate provided by cooler master, 4. tightening only with bolt&nuts provided by cooler master
http://i43.tinypic.com/iqlxz6.jpg

You can see MOSFET heatsink in this pic.
http://i39.tinypic.com/154c9sm.jpg

Mining status. The max is more than 39GHs. Awesome!!
http://i42.tinypic.com/14vie00.png
legendary
Activity: 1274
Merit: 1004
Awesome, thanks for the pic, which heatsinks would well for those areas? links to any would be awesome =)
When I was prototyping I just used these ones since I could get them next day.
http://www.digikey.com/product-search/en?x=0&y=0&lang=en&site=us&KeyWords=294-1100-ND
Two of them are enough to cover all 4 phases.

You can get heatsinks cheaper than that if you don't mind waiting though. I bought these guys as well, and just cut them in half and put both halves on the board.
http://www.ebay.com/itm/Aluminum-Heat-Sink-10pcs-lot-x-150-20-6mm-for-LED-Power-IC-PBC-Module-Transistor-/181132035289?ssPageName=ADME:L:OC:US:3160
legendary
Activity: 2450
Merit: 1002
can someone tell me which parts of the VRM are most important to cool w/ little heatsinks?
It's best to just add heatsinks to the back of the board.  However, the parts you are cooling are the black plastic transistors between the large aluminum cylinders (the filter capacitors) and the large black cubes of metal (the inductors). 

The reason the back is better to cool than the parts directly is that the parts are mounted with a metal pad in the middle that is designed to conduct the heat into the board.  On the other hand, the top of the part is plastic and does not conduct heat as well.  Thus, cooling the back of the board is best.  Also, when you add heatsinks on the top of the parts, you risk shorting out some of the other small capacitors near the devices you are cooling.

To repeat: It is best to heatsink and cool the back of the board under the VRM, and NOT heatsink any of the individual parts.
can you take a pic of what area on the back to add heatsinks to?
The copper around the fets is pretty efficient at transmitting heat, so using a bigger heatsink interface is always better than a small one since the thermal resistance of the solder mask and whatever adhesive you use is actually quite high. As a bonus, there's a couple areas that you can use to help cool the inductors if your HS is big enough to cover them.



Awesome, thanks for the pic, which heatsinks would well for those areas? links to any would be awesome =)
sr. member
Activity: 262
Merit: 250
My cooling solution!!

1. Backplate: http://www.amazon.com/gp/product/B004W8AOK2/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1

The black rubber looks like shadow. It is rubber sheet for insulation. The steel backplate is very thick and sturdy.

2. Cooler: http://www.amazon.com/gp/product/B005SEZBXY/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1

This horizontal cooler may be good to chill down MOSFETs.

3. MOSFET Heatsink: http://www.amazon.com/gp/product/B004CLDIHK/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1

3M thermal tape is included.

4. Raspberry Pi
No need to describe

No need to buy additional screws. I could attach both of the backplate and the cooler just with screws provided by Cooler Master.

I put all these in my garage, and for the internet connection, installed a WiFi multi-bridge, which transparently connects the Raspberry Pi in the garage to the Verizon WiFi router in the living room. My garage is crazy cold these days so my chilis show about 38GHs at below 60 Celsius degree.


PhDminer, this is cool. Can you show us pics of it assembled? Where the parts go with pics?
legendary
Activity: 1274
Merit: 1004
can someone tell me which parts of the VRM are most important to cool w/ little heatsinks?
It's best to just add heatsinks to the back of the board.  However, the parts you are cooling are the black plastic transistors between the large aluminum cylinders (the filter capacitors) and the large black cubes of metal (the inductors). 

The reason the back is better to cool than the parts directly is that the parts are mounted with a metal pad in the middle that is designed to conduct the heat into the board.  On the other hand, the top of the part is plastic and does not conduct heat as well.  Thus, cooling the back of the board is best.  Also, when you add heatsinks on the top of the parts, you risk shorting out some of the other small capacitors near the devices you are cooling.

To repeat: It is best to heatsink and cool the back of the board under the VRM, and NOT heatsink any of the individual parts.
can you take a pic of what area on the back to add heatsinks to?
The copper around the fets is pretty efficient at transmitting heat, so using a bigger heatsink interface is always better than a small one since the thermal resistance of the solder mask and whatever adhesive you use is actually quite high. As a bonus, there's a couple areas that you can use to help cool the inductors if your HS is big enough to cover them.

legendary
Activity: 2450
Merit: 1002
can someone tell me which parts of the VRM are most important to cool w/ little heatsinks?
It's best to just add heatsinks to the back of the board.  However, the parts you are cooling are the black plastic transistors between the large aluminum cylinders (the filter capacitors) and the large black cubes of metal (the inductors). 

The reason the back is better to cool than the parts directly is that the parts are mounted with a metal pad in the middle that is designed to conduct the heat into the board.  On the other hand, the top of the part is plastic and does not conduct heat as well.  Thus, cooling the back of the board is best.  Also, when you add heatsinks on the top of the parts, you risk shorting out some of the other small capacitors near the devices you are cooling.

To repeat: It is best to heatsink and cool the back of the board under the VRM, and NOT heatsink any of the individual parts.
can you take a pic of what area on the back to add heatsinks to?
member
Activity: 67
Merit: 10
What is the estimated cost... really like this concept.


I'm working on getting the first one cut out now.. I don't want to give a number until I can stick to it... But right now the cut files look like they will need about 2 ~ 2 1/2sf of acrylic per case and that's around $3.50 ~ $5.00 sf depending on color and supplier.  

Also, once I have final "v1" cut files done, I'll post them to github so that if anyone else have access to a laser and acrylic or has a way to make it better we can collaborate :-).


--- Edit: Beyond the acrylic cost there is, setup time, laser run time, cleanup time and shipping to account for so its not straight material cost calculation...  I won't know laser run time until I get a few cut and know how long it actually takes me and the machine to setup the cut, run the cut, inspect etc....


full member
Activity: 198
Merit: 100
can someone tell me which parts of the VRM are most important to cool w/ little heatsinks?
It's best to just add heatsinks to the back of the board.  However, the parts you are cooling are the black plastic transistors between the large aluminum cylinders (the filter capacitors) and the large black cubes of metal (the inductors). 

The reason the back is better to cool than the parts directly is that the parts are mounted with a metal pad in the middle that is designed to conduct the heat into the board.  On the other hand, the top of the part is plastic and does not conduct heat as well.  Thus, cooling the back of the board is best.  Also, when you add heatsinks on the top of the parts, you risk shorting out some of the other small capacitors near the devices you are cooling.

To repeat: It is best to heatsink and cool the back of the board under the VRM, and NOT heatsink any of the individual parts.
legendary
Activity: 2450
Merit: 1002
can someone tell me which parts of the VRM are most important to cool w/ little heatsinks?
hero member
Activity: 630
Merit: 500
Can they be screwed together or must they be glued?
How many Chilis can an enclosure hold?

The design is all tabs and slots as such there aren't really any thing to screw into. (keep in mind the fan & chili board will be screwed on not glued down).. That would be weird :-P) I'm going to cut them to be pretty tight so you might be able to just pressure fit them.   I suppose with a few strategically placed L brackets you could change it to screw together, but that's not in the design.. trying to keep it as simple as possible to make.  And being acrylic, a bit of acrylic cement and it will practically (and in some cases actually) be a single piece of plastic.

As for how many.. because I want to provide airflow to the mosfet's and people have soo many different cooling chooses the Queso holds 1 chili (two chili's in a small bowl like that would just be too hot :-P ).   If there is enough interest, I could be convinced to design a mult-chili rig.  Granted I have 10 chili's myself to setup.. I wanted something that if a chili has an issues can be worked on (away from the "rig") without taking everything else offline.



What is the estimated cost... really like this concept.
member
Activity: 67
Merit: 10
Can they be screwed together or must they be glued?
How many Chilis can an enclosure hold?

The design is all tabs and slots as such there aren't really any thing to screw into. (keep in mind the fan & chili board will be screwed on not glued down).. That would be weird :-P) I'm going to cut them to be pretty tight so you might be able to just pressure fit them.   I suppose with a few strategically placed L brackets you could change it to screw together, but that's not in the design.. trying to keep it as simple as possible to make.  And being acrylic, a bit of acrylic cement and it will practically (and in some cases actually) be a single piece of plastic.

As for how many.. because I want to provide airflow to the mosfet's and people have soo many different cooling chooses the Queso holds 1 chili (two chili's in a small bowl like that would just be too hot :-P ).   If there is enough interest, I could be convinced to design a mult-chili rig.  Granted I have 10 chili's myself to setup.. I wanted something that if a chili has an issues can be worked on (away from the "rig") without taking everything else offline.

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