[ANN] Bitfury is looking for alpha-testers of first chips! FREE MONEY HERE!

[cscape]

Power regulator is the APTS050A0X3-SRPHZ module. And the junk around the module is not heat stress, but flux residue.

Most of the board is reflowed, but I decided to hand solder to power module later. This turned out to be quite a messy deal. The pins of the module are hard to reach underneath the PCB, and the solid copper pours around the module make it hard to get the temperature up.

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[intron]

Power regulator is the APTS050A0X3-SRPHZ module. And the junk around the module is not heat stress, but flux residue.

Most of the board is reflowed, but I decided to hand solder to power module later. This turned out to be quite a messy deal. The pins of the module are hard to reach underneath the PCB, and the solid copper pours around the module make it hard to get the temperature up.

I'll drop of a bottle of flux remover if needed:)

intron

[Dexter770221]

Thanks cscape for answer. Later I was looking at code and found an answer myself
Another question. What is CPU load at your board? If it's not to big you may consider to place expansion port on your board and split SPI to more simpler boards (only with DC/DC regulator). I think that good switcher can be this part http://www.digikey.com/product-detail/en/SN74CBTLV3251PWR/296-9129-1-ND/378104.

[cscape]

Another question. What is CPU load at your board? If it's not to big you may consider to place expansion port on your board and split SPI to more simpler boards (only with DC/DC regulator). I think that good switcher can be this part http://www.digikey.com/product-detail/en/SN74CBTLV3251PWR/296-9129-1-ND/378104.

CPU load is less than 10%, so it could easily drive a lot more chips. However, most of the cost is in the DC/DC regulator and the ASICs, so it wouldn't actually save that much money.

[Dexter770221]

Another question. What is CPU load at your board? If it's not to big you may consider to place expansion port on your board and split SPI to more simpler boards (only with DC/DC regulator). I think that good switcher can be this part http://www.digikey.com/product-detail/en/SN74CBTLV3251PWR/296-9129-1-ND/378104.

CPU load is less than 10%, so it could easily drive a lot more chips. However, most of the cost is in the DC/DC regulator and the ASICs, so it wouldn't actually save that much money.

3 multiplexers (2$) and you can hook up 8 boards. Without LPC, ethernet it wiil be somwhere 150$ cheaper that's propably half a board for free
Not to mention one 8 port router less and 8 ethernet cables (less cable mess, less power needed).

[cscape]

The LPC + Ethernet is more like $15. That's less than a single ASIC. For a complete system with fan, heatsink, maybe a case, 12V power supply, the difference in cost is hardly worth the effort of having two types of PCBs and a new interconnect.

For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.

[intron]

For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.

Yes, let's make that one! Can be done over the weekend...

intron

[Dexter770221]

The LPC + Ethernet is more like $15. That's less than a single ASIC. For a complete system with fan, heatsink, maybe a case, 12V power supply, the difference in cost is hardly worth the effort of having two types of PCBs and a new interconnect.

For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.

If properly designed you need only one type of board. One populated fully, other 8 just with regulator. And this also opens perspective to make other communication solutions like USB to SPI bridge and control via PC (or RPi).

[jspielberg]

For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.

Yes, let's make that one! Can be done over the weekend...

intron

Right now m-boards are effectively 800 bucks.  Would really prefer cheaper sourcing in case we need to replace one.  I would have thought with no asics that board would be dirt cheap.  A clone board with built in Ethernet higher power capacity etc I think would be great.

[Tad3j]

It is any option to get board drawings, CAM, PDF, information of components used?

I am looking to take advantage of one manufacturer near by me.

[turtle83]

The LPC + Ethernet is more like $15. That's less than a single ASIC. For a complete system with fan, heatsink, maybe a case, 12V power supply, the difference in cost is hardly worth the effort of having two types of PCBs and a new interconnect.

For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.

The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on..

In an ideal world cgminer would act as proxy ( https://bitcointalk.org/index.php?topic=251224.0 ) . Run 2 instances of each on real computers (or pi) and use these 2 proxies as pools in the embedded device.

[cscape]

If properly designed you need only one type of board. One populated fully, other 8 just with regulator. And this also opens perspective to make other communication solutions like USB to SPI bridge and control via PC (or RPi).

Yes, you could make the same board, and populate one partly. It still means you have to interconnect them some way. Suppose someone makes a case for it, that case will also need an extra opening for the interconnect, and then you'll have unprotected 3.3V CMOS level signals going from one board to another, with potential ESD and EMI problems.

The board already has an option for RS-485 interconnect (it's on the unpopulated 3 pin connector along the side). That would be more suitable for board-to-board communication. Of course, that would still require the CPU, but that's only $5 @ qty 1000. I'm not too convinced the RS-485 is so great either. This board, with 16 chips, is targeted towards the small home miner with a limited budget. Put it in a nice case with power supply, and you have a neat little standalone unit.

[cscape]

The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on..

The firmware already supports stratum and 4 different pools with automatic switching if a pool is non-responsive. The only limitation is the 4KB memory set aside for the coinbase data, which may be too small in some cases.

[turtle83]

The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on..

The firmware already supports stratum and 4 different pools with automatic switching if a pool is non-responsive. The only limitation is the 4KB memory set aside for the coinbase data, which may be too small in some cases.

Awesome. I guess im stating the obvious, but have http api as well to configure pools, restart, monitor, etc. I wouldnt mind paying slightly higher for one controler per 16-chip board since its a lot more scalable/durable and each unit individually has value.

[Dexter770221]

This board, with 16 chips, is targeted towards the small home miner with a limited budget. Put it in a nice case with power supply, and you have a neat little standalone unit.

Here I have to agree that this solution is better for small miners.

[buzzdave]

It is any option to get board drawings, CAM, PDF, information of components used?

I am looking to take advantage of one manufacturer near by me.

Email sales@megabigpower.com for this

[buzzdave]

Tytus brings up the first 100Gh/s for 100TH project: https://bitcointalk.org/index.php?topic=140366.msg2811496#msg2811496

[yuchuanzhen]

Tytus brings up the first 100Gh/s for 100TH project: https://bitcointalk.org/index.php?topic=140366.msg2811496#msg2811496

Awesome!
So,where is the other 99.9TH?
ETA,please.

[tom99]

100Th/s about 250 400Gh/s miner full kit that alot of work.

[spiccioli]

The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on..

The firmware already supports stratum and 4 different pools with automatic switching if a pool is non-responsive. The only limitation is the 4KB memory set aside for the coinbase data, which may be too small in some cases.

cscape, so p2pool does not work, does it?

can you try it?

spiccioli