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Author Topic: X6500 Custom FPGA Miner  (Read 207986 times)
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August 30, 2011, 07:00:44 PM
 #21

sorry, am i missing something? who would pay $600+ for 180MH???

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August 30, 2011, 07:34:27 PM
 #22

we are putting a 5.5mmx2.1mm barrel plug on our boards.
As well, not instead? Please say it's as well.

who would pay $600+ for 180MH???
Me, for one.
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August 30, 2011, 07:37:39 PM
 #23

we are putting a 5.5mmx2.1mm barrel plug on our boards.
As well, not instead? Please say it's as well.

I am sure it is as well.

who would pay $600+ for 180MH???
Me, for one.

Me too.
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August 30, 2011, 08:11:16 PM
 #24

I should point out that a little overhead on the current output of the AC adapter you use is a good thing. Voltage should be between 5-12V. And, important one here, the adapter should be center positive, usually with a little picture like this:



I was going to say that using anything different would void the warranty.... but, there is no warranty! Void away, hackers! We aren't gonna fix it when you blow it up!

And, yes, we will keep the Molex, so you can choose. Although, please don't plug in both at the same time.

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August 30, 2011, 08:15:29 PM
 #25

sorry, am i missing something? who would pay $600+ for 180MH???
Well you can hook it up to a 30W solar panel which costs another $200...  and you get free bitcoins forever? Well 0.1 BTC per day...
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August 30, 2011, 08:31:57 PM
 #26

A nice feature would be a IDC connector with some I/Os from FPGA (somwhere on edge of the board) Let's say 16 I/Os plus 2 VCCIO and 2 GND pins. It's shouldn't be a problem to route since you use 4 layer board. It may help to connect some push buttons and some LED's. Just an idea... If someone would like to modify a code and add some functionality like RESET switch. The more I/Os the better but of course if you find sufficient space on board to do that...

Edit: or to connect LCD display, it could show stats, so quick "throw of an eye" and you know that's everything is ok (or not)...

Under development Modular UPGRADEABLE Miner (MUM). Looking for investors.
Changing one PCB with screwdriver and you have brand new miner in hand... Plug&Play, scalable from one module to thousands.
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August 30, 2011, 08:52:35 PM
 #27

Quote
Could you fill us in on what sort of regulator you're using to go from 5V to 1.2V?  The LMZ's aren't rated for this, so it looks like the scheme has changed.

Trade secret! It is not the original LMZ regulators that were on the first gen, however, you are right about that.

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August 31, 2011, 12:50:09 AM
 #28

sorry, am i missing something? who would pay $600+ for 180MH???
Well you can hook it up to a 30W solar panel which costs another $200...  and you get free bitcoins forever? Well 0.1 BTC per day...

Well, not "forever" ...the sun will eventually run out of power.  Roll Eyes
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August 31, 2011, 01:38:32 AM
 #29

sorry, am i missing something? who would pay $600+ for 180MH???
Somebody whose mom no longer pays for his electricity.
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August 31, 2011, 02:15:43 AM
 #30

sorry, am i missing something? who would pay $600+ for 180MH???
Somebody whose mom no longer pays for his electricity.

lol

If you like this tread consider to donate some to https://bitcointalk.org/donate.html
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August 31, 2011, 02:24:12 AM
 #31

This is awesome!

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August 31, 2011, 02:38:39 AM
 #32

sorry, am i missing something? who would pay $600+ for 180MH???

Somebody who has an aversion to big power bills.
Somebody who still wants to do cost effective mining after GPU's have run their course.
Somebody who doesn't want to have to use a motherboard requiring video slots, configuration etc.. etc.. Just USB.
Somebody who is smart.  Tongue
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August 31, 2011, 03:30:53 AM
 #33

After a lot of quotes, spreadsheets, and Digikey scouring, we were finally able to settle on a price point for this round of pre-orders. Unfortunately, 20 of those orders backed out this morning because the buyer thought $50 was the final price, so we're left with 49 X6500s and 2 X6000s. At that quantity, we're able to get the prices down to $610 (X6500) and $410 (X6000).

We learned some hard lessons about estimating prices based on back of the envelope calculations. We also learned how much Paypal charges in fees and that only about 1/3 of the pre-order deposits were paid with BTC!

We still need to get the prototype built, so we won't start accepting full payments until after that's up and running. Once we get that in our hands and everything looks good, we'll set a due date for the final payment and an estimated lead time. Then the orders go out!

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August 31, 2011, 03:44:26 AM
 #34

After a lot of quotes, spreadsheets, and Digikey scouring, we were finally able to settle on a price point for this round of pre-orders. Unfortunately, 20 of those orders backed out this morning because the buyer thought $50 was the final price, so we're left with 49 X6500s and 2 X6000s. At that quantity, we're able to get the prices down to $610 (X6500) and $410 (X6000).

We learned some hard lessons about estimating prices based on back of the envelope calculations. We also learned how much Paypal charges in fees and that only about 1/3 of the pre-order deposits were paid with BTC!

We still need to get the prototype built, so we won't start accepting full payments until after that's up and running. Once we get that in our hands and everything looks good, we'll set a due date for the final payment and an estimated lead time. Then the orders go out!

Why dont you sell those 20 orders who backed out, im sure you could find 20 people fairly quickly.
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August 31, 2011, 03:48:04 AM
 #35

Why dont you sell those 20 orders who backed out, im sure you could find 20 people fairly quickly.

Yeah, we're considering it. The difference in price will only be a few dollars, tops, so it might not really be worth it. PM one of us if you really want to get an order in. If the price has come down, we'll announce a new one before we start accepting payments.

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August 31, 2011, 04:59:13 AM
 #36

Why dont you sell those 20 orders who backed out, im sure you could find 20 people fairly quickly.

Yeah, we're considering it. The difference in price will only be a few dollars, tops, so it might not really be worth it. PM one of us if you really want to get an order in. If the price has come down, we'll announce a new one before we start accepting payments.

I PM'd you, Re: getting an extra 3. Have full payment for total of 4 ready to go.  Smiley
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August 31, 2011, 05:03:34 AM
 #37


EDIT: Actually, I realized since posting this, that I'd only have to buy half the FGPA's while using half the wattage to charge a battery for night time use. Still, 720 MH/s is nice for ZERO running costs. At under $3500 total investment that runs out to breaking even after about 2.7 years, solar panel extra hardware and all. The beauty is, after paying for itself, it's all money for (no)jam. Who wouldn't buy a $3500 (retail) FPGA solar mining kit, knowing the sun's gonna shine and FPGA will last and dominate for probably another decade? Those are conservative figures BTW and don't account for the rapid disappearance of GPUs after the next difficulty increase, nor the steady rise in value of the BTC.


Not to rain on your parade, but be realistic:

1-Don't count on a 30w consumer solar panel to still power your devices in 3 years, and your batteries will need to be replaced several times over that stretch. 15w for 14 hours is an expensive battery and will deteriorate quickly from frequent deep cycling.
2-Unless it's extremely well-placed and on a heliostat, your panel will operate at 100% for a grand total of 0% of the time and will only approach 100% for a small part of the day.
3-Regardless of where you live, it is not sunny 100% of the time. Find out your longitude and latitude and google a solar calculator, enter your info and see what kind of realistic production you can expect.
4-You still gotta run a computer.

Small scale solar is cost prohibitive.

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August 31, 2011, 05:20:30 AM
 #38

I PM'd you, Re: getting an extra 3. Have full payment for total of 4 ready to go.  Smiley

No problem, Karmicads. Consider it done!

How about this, we'll be much more willing to accept new orders if you're planning to pay with BTC! Smiley

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August 31, 2011, 05:38:52 AM
 #39

You should give a small discount for paying by bitcoins. Basically transfer the paypal savings to the buyer. Plus there's no chance of chargeback. So it's win-win. What do you think?

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August 31, 2011, 06:33:36 AM
 #40

sorry, am i missing something? who would pay $600+ for 180MH???
Well you can hook it up to a 30W solar panel which costs another $200...  and you get free bitcoins forever? Well 0.1 BTC per day...
Cool, so you will pay it off in 2.5 years.
You should give a small discount for paying by bitcoins. Basically transfer the paypal savings to the buyer. Plus there's no chance of chargeback. So it's win-win. What do you think?
They still have to pay to withdraw from Mt.Gox/Dwolla to practical currency. Once you factor in conversion costs, it really saves nothing. The only free, major service is AmazonPayments.
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