[ANN] Twinfury USB miner - page 3. | Bitcointalksearch.org

aauer1

member

Activity: 110

Merit: 10

Quote from: Blackwolve on 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.

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.

Quote from: cryptobal on December 15, 2013, 05:48:17 PM

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).

Atomar

sr. member

Activity: 280

Merit: 250

Link ?? ;-)

takagari

legendary

Activity: 1050

Merit: 1000

Mine's already up on ebay, see what I get

cryptobal

newbie

Activity: 16

Merit: 0

Quote from: aauer1 on December 14, 2013, 02:45:42 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) ??

Blackwolve

newbie

Activity: 26

Merit: 0

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.

aauer1

member

Activity: 110

Merit: 10

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.

Atomar

sr. member

Activity: 280

Merit: 250

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.

Blackwolve

newbie

Activity: 26

Merit: 0

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?

Atomar

sr. member

Activity: 280

Merit: 250

Right now there are 30 in stock !!

http://minecoin.net/product/twin-bitfury-usb-miner/

MassimoJee

member

Activity: 112

Merit: 10

Are Twin Bitfury USB miners still in stock ? If not, when the next batch ?

Atomar

sr. member

Activity: 280

Merit: 250

Cool !! Thank's for the Explanation !

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

eneloop

legendary

Activity: 1513

Merit: 1040

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.

Atomar

sr. member

Activity: 280

Merit: 250

Sorry. Don't get it. What are you calculating ??

And the question is still: What's better; more Mh/s OR less error ??

eneloop

legendary

Activity: 1513

Merit: 1040

0: 5371*0.944= 5070 MH/s
1: 5567*0.9= 5010 MH/s
-> Both are working at about the same speed.

Atomar

sr. member

Activity: 280

Merit: 250

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....

aauer1

member

Activity: 110

Merit: 10

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.

aauer1

member

Activity: 110

Merit: 10

Quote from: Atomar on 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!

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

.

Thanks for testing! Will post a small tuning howto on the http://minecoin.net website.

eneloop

legendary

Activity: 1513

Merit: 1040

always post hw error rate too please (after several hours hashing).

Atomar

sr. member

Activity: 280

Merit: 250

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!

Atomar

sr. member

Activity: 280

Merit: 250

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 ...

Topic: [ANN] Twinfury USB miner - page 3. (Read 30167 times)