Very cool !
I didn't go with the block erupters (a lot of them), because the ROI on them is not good.
I just bought one for the hell of it, just to play with it. We will see how it works out.
Topic: A case study in entry-level mining - page 14. (Read 53568 times)
Just for fun and giggles, do you have a kill-a-watt running for all those badboys? and if not, get one 
Big problem this morning: cgminer reported all 5 Block Eruptors hashing at 250MH/s, amd all five BEs had their green LED illuminated. This could be a heat issue; I'm not sure. I've unplugged everything for now to let it cool.
Ups, lets hope it's nothing big.
Big problem this morning: cgminer reported all 5 Block Eruptors hashing at 250MH/s, amd all five BEs had their green LED illuminated. This could be a heat issue; I'm not sure. I've unplugged everything for now to let it cool.
Congrats.....
Now all the info is clearly explained.... and nicely done too.
Now all the info is clearly explained.... and nicely done too.
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Current profitability is 60 mBTC per day. I was hoping for 70,
It is already a failure...
If you were smart you would have re-sold the BE's on Ebay, because they are not likely to mine with profit....
The rig is operating at 85% of what I estimated. With proper cooling this will increase, further improving the accuracy of my prediction.
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Profitability is something that is above and beyond your current expenses for a given endeavor.
If I spend $1000USD on setting up a business then find $10USD it is not profitability...
It is an offset against costs.
If I spend $1000USD on setting up a business then find $10USD it is not profitability...
It is an offset against costs.
You are technically correct on this one point of business. I will rephrase my statement: revenue is 60 mBTC per day
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Your costings are WAY off and do not give a true depiction of the situation.
(electrical/cooling costs)
(electrical/cooling costs)
The Raspberry Pi model B draws 700mA @ 5V. This is 3.5W of power. The 5 USB Eruptors each draw 500mA @ 5V. This is 12.5W of power. The USB fan will draw another 2.5W. This is 18.5W in total. This is slightly more than a modern light globe. My costings are accurate.
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This is why so many businesses fail in the first year....
Second point...
The hub is working 100% correctly, the USB standard CLEARLY defines that 500MA is the maximum current a device can draw.
The fact that this USB miner draws more, is a testament to the poor design in using the USB port beyond its spec.
Second point...
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Neither works. The eBay one only outputs 500mA @ 5V
The hub is working 100% correctly, the USB standard CLEARLY defines that 500MA is the maximum current a device can draw.
The fact that this USB miner draws more, is a testament to the poor design in using the USB port beyond its spec.
The cheapo ebay hub can draw 500mA for all seven USB ports. This is enough current to power one Block Eruptor, which does conform to the USB standard. The D-Link hub I am using can deliver 3A, enough to power six Block Eruptors.
Quote
Current profitability is 60 mBTC per day. I was hoping for 70,
It is already a failure...
If you were smart you would have re-sold the BE's on Ebay, because they are not likely to mine with profit....
Profitability is something that is above and beyond your current expenses for a given endeavor.
If I spend $1000USD on setting up a business then find $10USD it is not profitability...
It is an offset against costs.
Your costings are WAY off and do not give a true depiction of the situation.
(electrical/cooling costs)
This is why so many businesses fail in the first year....
Second point...
Quote
Neither works. The eBay one only outputs 500mA @ 5V
The hub is working 100% correctly, the USB standard CLEARLY defines that 500MA is the maximum current a device can draw.
The fact that this USB miner draws more, is a testament to the poor design in using the USB port beyond its spec.
Great documentation & thread idea!
btw - the 2 hi-power ports on the D-Link work as normal data ports as well, no?
btw - the 2 hi-power ports on the D-Link work as normal data ports as well, no?
Yes, absolutely -- just note the power supply delivers a max of 3A which is enough to power 6 Eruptors. You can use the 7th port to daisy-chain another hub!
Great documentation & thread idea!
btw - the 2 hi-power ports on the D-Link work as normal data ports as well, no?
btw - the 2 hi-power ports on the D-Link work as normal data ports as well, no?
Very interesting stuff presented very well. All the best and please keep us updated.
So I've been hashing for 24 hours, and everything is running smoothly. The hashrates have reduced slightly overnight. Yesterday they were in the 335.5-336.0 range, and now they're in the 335.0-335.5 range. The tiny divot on the daily graph at midnight is my donation time to Neil. Hardware errors are still high, so I really need the USB fan to arrive soon. Current profitability is 60 mBTC per day. I was hoping for 70, but maybe this will improve when the cooling is installed.
cgminer 3.2.1 stats
EDIT:
Better cgminer 3.2.1 stats (24 hours later)
EDIT:
Better cgminer 3.2.1 stats (24 hours later)
IT'S UP AND RUNNING!!
EDIT:
Better photo
This is a really awesome thread and I hope you keep up with it. Your transparency about personal progress is great to read and I'm sure would be an excellent resource for new miners.
Truly great idea I can't wait to see how this turns out. Hopefully I can learn something, all the best.
Fun thread. After my Jaly's arrive (very soon) and I've mined sufficient capital, I plan to invest in Erupters as well. Thanks for the step by step!
For the USB hub you need to get the DLINK DUB-H7. It can power your Pi, plus 5 USB erupters and still have room to power a fan.
Yep, I've got one on order.
EDIT: It's been shipped.
For the USB hub you need to get the DLINK DUB-H7. It can power your Pi, plus 5 USB erupters and still have room to power a fan.
Hey congrats on your success so far in only a couple months. Everything aside, you have a good amount of BTC PLUS a nice Mining setup. 
I've always liked MineForeman since he joined up. He's been a stand-up guy.
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