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Topic: [ANN] Twinfury USB miner - page 3. (Read 30177 times)

member
Activity: 110
Merit: 10
December 16, 2013, 04:53:45 AM
The hub looks well.
Does it use USB2 with much more power or support it USB3?

Price and delivery time plz Wink

I have to buy a new hub, so i can buy it from you and report.
It is just an USB 2.0 compatible hub (only supports low speed and full speed USB transfers). I have just got 5 prototypes working without a case or something like that. I will probably produce some of it the next year.

At the moment, I'm not able to tell you the exact price of the hub. But foremost the USB connectors are a bit pricey. I have to see if my fab is able to get the price down.

can the hub handle 7 overclocked twinfurys? (>6,3Amps) ??

Yes the hub can handle this. The power supply is able to deliver around 8Amps for the 7 ports (can also be improved to 10Amps for 7 ports).

sr. member
Activity: 280
Merit: 250
December 16, 2013, 12:50:02 AM
Link ?? ;-)
legendary
Activity: 1050
Merit: 1000
December 15, 2013, 10:25:57 PM
Mine's already up on ebay, see what I get Smiley
newbie
Activity: 16
Merit: 0
December 15, 2013, 05:48:17 PM
I have some other interesting news for you:
The other news is that I got a prototype of my 7 port USB hub which is the perfect accessory for the Twinfury miner. The port spacing is wide enough for the big heatsink of the Twinfurys. So, no port gets unused. Have a look at the pictures below. Furthermore, the hub is working with the Raspberry Pi.
can the hub handle 7 overclocked twinfurys? (>6,3Amps) ??
newbie
Activity: 26
Merit: 0
December 14, 2013, 05:38:39 PM
The hub looks well.
Does it use USB2 with much more power or support it USB3?

Price and delivery time plz Wink

I have to buy a new hub, so i can buy it from you and report.
member
Activity: 110
Merit: 10
December 14, 2013, 02:45:42 PM
About 70 Twinfury miner are still available from the first batch but only 30 pieces of them are tested and working at the specified hash rate.

I have some other interesting news for you:
  • First of all. Thanks to luke-jr for merging my voltage scaling patch into the Twinfury driver of bfgminer. This means that I will post a firmware update the next days with some instructions to do the update. So, you can use the voltage scaling feature of bfgminer with your Twinfury.
  • The other news is that I got a prototype of my 7 port USB hub which is the perfect accessory for the Twinfury miner. The port spacing is wide enough for the big heatsink of the Twinfurys. So, no port gets unused. Have a look at the pictures below. Furthermore, the hub is working with the Raspberry Pi.



sr. member
Activity: 280
Merit: 250
December 14, 2013, 11:33:08 AM
I do have a arctic breeze pro fan running on about 50% speed. The temperature right now is 27°C & 32°C.
So it stays pretty cool WITH the fan.

For the RaPi: That is 43°C with 0.11 CPU load the last 15 min.
newbie
Activity: 26
Merit: 0
December 14, 2013, 11:26:48 AM
next time i will take express, send last monday and runs upto 10 days Wink

I'm happy to see, that the overclocking works fine. Can you touch the heatsink and did you have a fan to them?
sr. member
Activity: 280
Merit: 250
December 14, 2013, 09:59:32 AM
Right now there are 30 in stock !!

http://minecoin.net/product/twin-bitfury-usb-miner/
member
Activity: 112
Merit: 10
December 14, 2013, 09:47:54 AM
Are Twin Bitfury USB miners still in stock ? If not, when the next batch ?
sr. member
Activity: 280
Merit: 250
December 14, 2013, 09:02:45 AM
Cool !! Thank's for the Explanation !

That's what I thought. I probably replace the 6.8k resistor with 8.2k one.

legendary
Activity: 1513
Merit: 1040
December 14, 2013, 08:51:48 AM
just percentages.

10% error rate means 10% of your nominal speed are erros -> nominal speed*0.9 is your real hashing speed.
5.4% error rate means nominal speed*0.944

whats better -> all depends on nominal speed to error rate
due to power consumption lower speed + lower error rate is better than higher speed + higher error rate.

in your case both are allmost the same, twinfury 0 is the slightly better one.
sr. member
Activity: 280
Merit: 250
December 14, 2013, 08:07:37 AM
Huh Sorry. Don't get it. What are you calculating ??

And the question is still: What's better; more Mh/s OR less error ??
legendary
Activity: 1513
Merit: 1040
December 14, 2013, 07:25:07 AM
0: 5371*0.944= 5070 MH/s
1: 5567*0.9= 5010 MH/s
-> Both are working at about the same speed.
sr. member
Activity: 280
Merit: 250
December 14, 2013, 01:06:48 AM
OK. Here we go with the stats:

Uptime: 15 Hr



Big question now: What's better; more Mh/s OR less error Huh
On one of the Twin's I have to change the resistor....
member
Activity: 110
Merit: 10
December 13, 2013, 12:40:55 PM
For all of you, who are interested in tuning the Twinfury, I posted one method on the minecoin.net website. This is the kind of tuning atomar has successfully tested.
member
Activity: 110
Merit: 10
December 13, 2013, 10:56:32 AM
OK. So after 40 Minutes the stats are:

TBF 0 28.2°C 5375.106 Mh/s
TBF 1 32.4°C 5581.668 Mh/s

You probably can tell which Twin has the 6.8k resistor Wink
Think, I have to do the second one also with an 6.8k ....

Good Job aauer1 !!! Looking forwar to do the Software modd!

That looks really good. TBF 1 is the one with the 6.8k resistor Smiley.

Thanks for testing! Will post a small tuning howto on the http://minecoin.net website.
legendary
Activity: 1513
Merit: 1040
December 13, 2013, 10:31:43 AM
always post hw error rate too please (after several hours hashing).
sr. member
Activity: 280
Merit: 250
December 13, 2013, 10:27:15 AM
OK. So after 40 Minutes the stats are:

TBF 0 28.2°C 5375.106 Mh/s
TBF 1 32.4°C 5581.668 Mh/s

You probably can tell which Twin has the 6.8k resistor Wink
Think, I have to do the second one also with an 6.8k ....

Good Job aauer1 !!! Looking forwar to do the Software modd!
sr. member
Activity: 280
Merit: 250
December 13, 2013, 09:49:01 AM
Just pluged in the 2 modded Twin's to the RaPi.
One with 8.2k the other with 6.8k resistor.

Will Report later how they do ...
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