Bitcoin Forum

Hello Community,

I would like to annouce my latest development. It is a "Twin Bitfury Chip USB Miner". It is the further development of the Blue-/Redfury miners I developed some month ago. I'm posting this because a very limited number of 200 devices are manufactured right now. They will be available soon for sale.


Some specs of the device:

• Rated hashrate: 4.5-5GH/s (Prototypes are currently hashing stable at 4+GH/s on an USB 2.0 port)
• Power usage: ~3.25W@4GH/s (~0.8125W/GH)
• Dimension: L55mm x W35mm x H37mm (including the heatsink and the components on the PCB, USB connector excluded)
• Powered from the USB port. No external power supply needed
• Temperature sensor to measure the device temperature
• Software controlled voltage scaling

Compared to the Blue-/Redfurys, the Twin Bitfury Miner is about 5mm wider and 10mm shorter. The heatsink is bigger to cope with the generated heat of both Bitfury chips. An additional temperature sensor is used to track the temperature of the device. Currently, the device is running with a modified version of bfgminer 3.6.0. The device is supported by bfgminer 3.7.0 and higher. The Twinfury miner is tested on Windows, Linux and Mac OS. The Raspberry Pi can also be used to use the Twinfury. But you definitely need a USB hub.

For Mac OS, nwoolls has written a blog post about the Twinfury: http://blog.nwoolls.com/2013/12/28/bitcoin-mining-on-mac-os-x-twinfury-asics/

My prototypes are hashing stable at 4+GH/s on an USB 2.0 port. I guess most of the USB 2.0 ports are able to source a bit more current than the rated 500mA. However, to be on the safe side, the device should better be used on an USB 3.0 port or on an USB hub which is rated for a higher current. The devices comes with a preloaded USB bootloader for updating the device firmware if necessary.

Updates

26.11.2013:	bfgminer 3.7.0 is supporting the Twinfury!
27.11.2013:	Price fixed (see above)
29.11.2013:	I got the assembled PCBs from the fab and they are looking so good.
04.12.2013:	Online shop will be available soon: http://minecoin.net (http://minecoin.net). Register with your mail address to get notified when the shop opens.
06.12.2013:	First units are available in our online shop.
13.12.2013:	One tuning method published on http://minecoin.net (http://minecoin.net).
18.12.2013:	We reduced the price to 250 EUR per unit as a Christmas special.
02.01.2014:	We wish everyone a happy new year. We are again ready to accept your orders. All the units we ship from now on support the voltage scaling feature.
20.02.2014:	SOLD OUT

How much € Is it ? And you from America or europ?

The price depends on a number of things I have to consider. So, can't tell you a price at the moment.
I'm from Europe.

Another solid product Andreas, Good Luck!

Curious why not go for USB 3.0 spec standard for more power? The Bi-fury usb supposedly can hit 5.3 gh/s stable.

You recommend USB 3.0 for increased current but will it actually draw a full 900 mA?

Nice they look sweet! reserved!
Is there a discount for buying in bulk?

Awesome, looking forward to this product! Can we reserve them?

If it is drawing 900mA, on a 20 port usb hub that would be almost 20 amps. Is there any risk in running that much power through the hub. Won't it burn out the hub internal tracks? I mean are standard usb hubs designed to take this much current?

very interested

The power consumption isn't depending on your will. The consumed power depends mostly on the Bitfury chips and how they are used. These are the power hungry parts on the miner. But you cannot tell the chips they should use a specific amount of current. The power depends basically on two things:
1. supply voltage of the chip and
2. frequency of the internal oscillator (this is a software thing)

I designed the board to be stable. Doesn't want to get them all back because the specified hash rate is hardly met. For the final hash rate, I have to test the miners when I get them from the fab.

To come back to your original question. I tested my boards on USB 2.0 ports. And they are working stable for days and they are not hashing faster on an USB 3.0 port. But I know that the cosumed current is higher then specified for USB 2.0. So, I have to tell you that it is better to run them on USB 3.0 ports to be within the specs of the USB. But there are also some USB 2.0 hubs which can cope with the higher current.
Furthermore, I think my prototypes have some bad performing Bitfury chips on it. So, I hope the final product will perform better.

Some notes for the engineers out there: The Twin Bitfury Miner can be modified to support scaling the supply voltage of the Bitfury chip. But therefore some resistors have to be changed and the firmware has to be modified to support this feature.

If they are specified for this amount of current, it should be working. Depends probably on the quality of the product.

Looks really good, when are you planning to finalize the price and ship it out?

Also, have you tested it on a USB 3.0?

Yes, I tried one of my prototype on a USB 3.0 port. But wasn't hashing with a higher rate. But I think the prototypes have some bad performing chips on it. Final hash rate will be tested when I get the devices from the fab.

The plan is to finalize the price until next week. Hopefully, the production finishes also this week and I have the devices in hand next week. Thats the plan.

I see. Are you planning to ship the product overseas or only in land?

It's a really nice product: if the price is nice too I'll buy some

That's a neat miner there. Saves space and easier cooling I guess. Please let us know the price as soon as you have them all checked.

Looks interesting, will be following this thread  ;D

put me down for 2 to 5 depending on price...

hey do you intend to produce boards? since you have access to fab i figured you might as well start assembling bigger miners...

Watching and waiting for price.

very interested, watching, if possible would like to reserve ~2

put me down for 5 to 10 depending on price...

Waiting for the final price and shipping cost to EU...

I'm very interested would also like to buy at least one depending on the price, a lot more if they are cheap and affordable

Looking good,
best of luck with that Andreas

cheers,
kev

Looks interesting, will keep an eye out for the price

Can we reserve some of them? If yes I take 10. Depending on price.
thanks

I see that there is some interest. That's very nice!
I will do my best to come up with a price for it as soon as possible. What I can say right now is, I would like to sell them for BTC only. But the price will probably be based on EUR and converted to Bitcoin during checkout.

Keep watching!

waiting for price would like 2

Excellent work!  I will be interested in a couple, too.  Do you know if you will have a US distributor yet?

Very interested in this.  Can't wait to see some specs and some pricing.  Might be interested in a bulk of the 200.

I'm interested, count me in for 5!

Put me down for 50-100 if your price is good. Thanks.

Got some updates from my fab. They have assembled the first 12 Twinfurys. Have a look:

Zexy boards...

Put me down for a few

The initial batch is for 200, correct?  Maybe you could sign them...

Interested - I'll take 15 if price is good.

That's a good idea ;-). I could sign them on the heatsink...

if had a good price sign me for 100 or more

Have to tell you some good news. Twinfury is now supported by bfgminer 3.6.0. luke-jr merged my driver code into his repository. Thank you luke!

price?

keeping my eye on this.  Will want a few for sure.

watching as well

I'll be in for 3 if the price isn't ludacris.

Price is fixed now (see the original post).

$~120/GH?  Seriously?

Good luck on sales.

Well your price sucks to be frank... myabe if your priced them at 0.14 I will buy 100 of them.

0.14 is insane. That's not possible.

.. price is included VAT?
what's the Price for outside EC?
shipment included?

How have you calculated this price per GH?
If you buy 10 pieces you get them for 246,5 Euro. This is about $75/GH.

WTF? 290€ ?


No interest!  ???

This is the price for end users. At the moment, I'm not able to make a price without VAT.

290 eur? insane guys. ahahahahha

for me you guys stay with all stock of twinfury ;)

I remember when those block erupters was priced at .95 BTC each. EACH. That's basically ~$850-$950 for 333 mh/s! Or ~$2550-$2850 per gh/s! (But those buyers DID ROI so maybe it didn't matter in the end).

Anyway I am interested but only if you would be able to accept cash (no BTC at the moment). If it takes the releases after the prototypes to sell them for cash then I'm willing to wait as well. Also it wouldn't hurt to have lowered the prices a bit too.

Can you guarantee they will all get 4.5 gh/s with proper power supplied?

I never owned any red/blue furies but I read a lot of people saying they were only getting about 2 gh/s on those when many were advertising 2.3-2.7 gh/s

Looking over your listing you say they are hashing stable at 4 gh/s but in your signature, and in the listing itself, you also quote 4.5 gh/s. I'm just wondering which I can expect. It makes a big difference when you start deploying in quantity...

My RedFury was hashing at 2.1 GHs before I applied the pencil mod. It now mines with about 2.6 GHs.

Right now, I cannot guarantee it. But I'm expecting that they will hash with 4.5+GH/s. Currently, I have only 4 prototypes running and they are hashing stable at 4.15-4.35 GH/s. For the final version, I'm expecting that they are doing a bit better. This is why I announced it with 4.5GH/s.

When I get the devices from the fab, I will have to program and test each device. After that, I will know the real hashrate and I will update the specification accordingly. And then the sale will start. So, you will know the real hashrate when you are able to buy the devices.

I don't want to make promises which I cannot keep.

It's really a bit expensive, but do you know shipping costs for Italy and delivery date?

Shipping cost to Italy will be around 20 Euro. I estimate that I have the devices ready for shipping in the next two weeks.

BFGMiner 3.7.0 released with Twinfury support (http://bfgminer.com)

I'm sorry but I'm out: there will be 2 retarget of difficulty before they arrive, so probably the new difficulty will be near 800M.
At that difficulty there will be pratically no ROI at 600€ for 2 even if bitcoin price rise of 10% a month (that's means 3000$ by the end of next year) and difficulty slows down from 110% to 30% a month.

watching

Appreciate the response. You are definitely more accessible than most board designers. I've been watching your competition, the Bi-fury, and saying that felipeo is difficult to deal with is a huge understatement...

Keep it up :)

Today, I got my assembled PCBs from the fab. Actually I tested 4 of them on USB 2.0 ports and they are hashing with 4.5 - 4.7 GH/s. I also measured the supply voltage of the Bitfury chip and I think they will do even better on USB 3.0 ports. Will order a USB 3.0 hub to test it.

Can anyone recommend a USB 3.0 hub?

Both I tried so far (Aitech and Orico) suck :(

price is expensive

Do you know Anker USpeed USB 3.0 Hub (9 Port + 1 Charge Port)?

No. Please let me know if it works reliably (and with a power switch..)

A bit pricey considering your competition. Hopefully you can figure out a way to lower your costs. Will be following this project!

nice development, I think lots of modern mobos can support 1.5A through bios or software anyway (through usb 2.0?) for the casual miner anyway, not sure how many you could run....

I'm using Plugable 7 Port USB 3.0 Hub because it's compatible with my RPi...

any updates?

I can only tell you that the heatsinks are on their way and should arrive tomorrow. When I have tested the first 20 devices I will start selling them. So, keep your BTC ready for spending  ;).

I have something more interesting for you. Got a screenshot of bfgminer with 3 Twinfurys attached.
They are mining with 4.62 - 4.87 Gh/s after 10 hours. So, the announced hashrate of 4.5+Gh/s still holds.

Hi there.

We decided to make a small online shop to handle all the requests when the miners are ready for sale. We are working hard to get the shop in place as soon as possible.
Until then, you are able to register yourself with your email address to get notified when the online shop opens its virtual doors.  :)

And in the meantime, I have some other good news for you guys. Finally, I got the heatsinks and the miner is ready for testing. As soon as I have the first 20 units tested and the online shop is ready, I will put it there and send all registered users an email.

Here are two images of the final Twinfurys:

Wow those heat sinks look big. can you post some final dimensions? I've been looking around at hubs but its hard to know what will work without knowing the miner's width and the height of the heat sink

You are right. The heatsink is big. But has to be to handle the generated heat. I guess there are only a few hubs (if there are any) with enough spacing between the ports to use every port for the miner. This is the reason why I started to make a custom USB 1.1/2.0 hub with 7 ports each able to source 1A and enough spacing to use all 7 ports. Prototype PCBs are already ordered and should arrive next week. Will keep you updated about the hub if you are interested.

The bi*fury devices which are also 2 bitfury chips generate way too much heat to be passively cooled with their heat sinks. It will be interesting to see if this extra heat sink area is enough or whether a fan is still needed. If the latter, then there really isn't much point to the extra area.

My Twinfurys are working stable without active cooling. The heatsink gets hot (about 60-70°C) but that's ok I guess. Temperature range for ASICs is usually 0 - 85°C (consumer range I guess).

The USB hub I bought (Anker USpeed USB 3.0 Hub) is working well with the Twinfury. I can fit 3 Twinfurys into it (the other ports are not accessible). I'm using the hub with an embedded Linux board (similar to the RasPi). But I don't know if the hub works with the RasPi, too. Haven't tried it, yet.

I hope people realize that these will sell out almost immediately.

Yes! They will go FAST ! Buy ASAP !!

Hi.

I have some good news and some bad news. Good news is that I have some units ready for shipping. So, the online shop will open tomorrow. Everyone who registered on the site will get an email notification, when the first units are for sale.
The bad news is that during my unit tests I have seen that there are some units which do not perform as expected. Instead of 4.5 - 5 GH/s, they reach only 3 - 3.5 GH/s. I know that the Bitfury chips have same performance variations. But I didn't expect this number of bad performing units.
This is why I'm considering to raise the price per unit a bit to get the development costs back with fewer sellable units. I know that this is really bad news for you and I'm really sorry for it.

This is also why I will make a compromise. I won't raise the price for the very first units which are going to be sold at the online shop tomorrow.

Just bin them by performance and price em 10% off and you'll get some coins wile you'll test em ;D

4GH/s over the next 100 days will make ~0.1 BTC ... at 25% diff change each diff
That's of course assuming none of HashFast, CoinTerra or KnC's next batch come out ...

Lower than 4GH/s will ... make less ...

Meanwhile ... https://bitcointalk.org/index.php?topic=294499.0

Edit: 2 chips < 4GH/s that's odd - I've not seen that on any of the BitFury hardware we have.

Edit: oops that had an extra 0 :P corrected to ~0.1 BTC

Hallo Andreas:

just do like a Phenom II X3: 1 dead core

that means for this market you have another product in a lower price range
which fits my needs
I will buy 2 "less performing" units for half the price!!! 8)

*Can I buy from Germany in €? (Paypal/Überweisung?)

*Could you please sell also single bitfury chips?
*Where/how do you get yout asics?

Over $300 a unit is a little high don't you think?

2 bitfury chips = $60
1 thumb board = $20
1 heat sink = $10
------------------------------
$90 - this is a GENEROUS calculation.


lets say 50% markup for orders of 500+  = $135
lets say 65% markup for orders of 250 - 499 = $148.50
lets say 75% markup for orders of 100-249 = $157.50

I wouldn't even sell to anyone as the manufacturer less then 100 units. if they want 1 unit get a group buy going

Generous and bitter dog:

Don´t go the "it is not fair" route,
If we were living in a fair society we would not need any bitcoins whatsoever...

1)
A guy in poland managed to get a nice working "Bi•Fury " and sold his first (prototype) batch here for 180€.
Straightaway he realised that it was VERY cheap,
got greedy (OK for me!)
and started selling in his website (http://store.bitcoin.org.pl) for 449 $
and here for half a BTC (https://bitcointalk.org/index.php?topic=342450.0;all)
he has not changed the price, therefore I suppose it is selling well.

And thanks to pumping by the mainstream media there is very stupid sheeple out there buying in fruitless prices:

like 893€
http://www.ebay.de/itm/Bi-Fury-USB-Bitcoin-ASIC-Miner-mit-ueber-wahnsinnigen-5-GH-s-Sofort-Lieferung-/251395314018

like 1000€
http://www.ebay.de/itm/Bi-Fury-USB-Bitcoin-ASIC-Miner-mit-ueber-wahnsinnigen-5-GH-s-Sofort-Lieferung-/251395338753

2)
(I HOPE) This is 100% German Craftmanship. Which is nice for something running 24/7 related with MONEY, and UPTIME (difficulty).

You can find here enough information to do a working TwoFury by yourself:
https://bitcointalk.org/index.php?topic=228677.0
And maybe instead of using those for mining yourself, you decide to sell them...

If you happen to get a nice working "2-Fury "
which is not hand-soldered in Vietnam but
with e-shop and shipping form inside europe,
I would be very happy to buy it from you at your aforementioned prices.

3)
It is not a secret that many neighbours here buy miners in groupbuys to flip it in ebay for double the price. (OK for me!)

Good ponits and 100% agree !!

Looking forward to test this puppies and make some BTC  ;D

Hi fellow miner,
the first 20 units can be purchased from our online shop at http://minecoin.net (http://minecoin.net). We also put a very small how to on it to get you started with the miner.

Amazing, ordered and already have a tracking number. This is how everyone should operate.

Out of stock

damn!

Sorry guys. Was a bit late with my online shop. There are again units in stock. I cancelled some fake orders. I will update the stock status when I have new units ready.

Can I please buy with bank transfer or paypal? (from Germany)
website only shows bitcoin as an option

Sorry, but we are  only able to accept Bitcoin at the moment. You can get some BTC at localbitcoins.com or bitcoin.de.

I can do a german Banküberweisung right now.

bitcoin.de is kind off xenophobic...
https://sites.google.com/site/lagarwerks/home/bitcoinDE.PNG

Some news for you guys. The first 20 units are already sold and I decided to keep the price for the moment fixed at 290 EUR per unit.

I will also keep on testing my units to fill up the stock. Thanks for buying the first units.

Look man, don't make me feel like a pervert uncomfortable...
I am not asking for warranty, receipts nor taxes

I just want 2 units shipped to germany,
payed per bank transfer in euros.
http://i3.kym-cdn.com/photos/images/newsfeed/000/264/241/9e9.gif
This is "made in Germany" right?

SURE :D

google says Austria...
oops!  sorry, let me try again...

This is "made in Austria" right?

Hurry up, guys ... Only 8 left in Stock ;D

I'm happy I get 2 allready shipped. Wayting for delivery next week ....

invoice included?
ToS and legal notice are missing!

Hi there,

all who want delivery to Germany plz send me a PM.
If are enough orders, it make sense to buy a larger number and sell from stock in germany.

I will open a thread in the german area here next time :)

Very tempted to buy one of these, even just to flip on ebay lol. But hmm. I may let it run in a cool spot in the basement as well for ever... Decisions.. decisions...

I really with HW salesmen would take paypal, offer's buyer protection and if your providing a physical product your safe. Just makes the whole damn community look shady.

Ack nevermind you lost me on the  €60 shipping, for a thumbstick..

Development was done in Austria. First 200 units was produced by a German fab. So, it is a kind of "co-production" :).

We are working on that.

how high is the insurance in case the packet does not arrive? 20 eur shipping cost does not sound too safe in that departent

also, the shop does not apply the discounts stated earlier in the thread. :(

thanks! let us know when you are ready to include an invoice with VAT.

as far as i know it's 510 € per parcel within the Austrian postal service (same for German one). higher insurance possible within own country only. maybe he has a special contract for higher insurance.

in the OP post you state that you developed the blue / red fury miners. I cannot find older posts from your account about that. Your website is also lacking an "Impressum" which is obligatory for germans or german websites. Don't know about Austria though. Sorry for being so mistrusting but we all know the bitcoin land is a world of scam. :D

I can confirm twinfury is developed by the same as red/blue fury.

Designed in Austria.
Made in Germany.

That´s OK for me. I just did not want to buy something handsoldered in Vietnam.

What is your next product?

aauer1 is the person who designed the bf1 design. That design was used for the blue and red fury units.

Thanks guys for confirming :)

is tracking working for you  ???

mine says :

The sender has provided electronic shipment information          06.12.2013 16:12:48

no update since friday  :-\

Your shop items are showing as 4.5 – 5GH/s, can you confirm that this is or not the case please?
If less, please can you update the shop?

At 4.5 – 5GH/s I'd buy some but if they were less than advertised when purchased, I'd not be getting what I paid for...

Tracking IS WORKING!! At least for me ;)

Package just passed custom. Hopefully get them today or tomorrow.
Will let you know ....

Hi,
Since the Bi•Fury is a very similar device, and they are getting firmware updates to push the active cooled miners to crazy temp limits...
http://c-scape.nl/bi-fury/

Are there any similar updates for the Twinfury so that we can get a bit more hashes???

I understant this could brick and burn my devices but we miners are kind of greedy that way.

I'll try replace the resistor as I did on my bluefury's to see if they get a bit more mh/s ...

You could also try the pencil mode to ;-)

I will post some tuning infos on the http://minecoin.net (http://minecoin.net) website, too (changing resistor values). Basically, the hardware is prepared for dynamic voltage scaling by software. There are "only" two things missing to do that. First, one resistor must be soldered in. Second, the software has to support this feature. Haven't got the time to implement this feature.

I'm currently very busy with shipping all orders and talking with the postal service about the first 3 parcels I shipped because their status isn't updating. So, will take some time to post the tuning infos on the website.


I can confirm that all units I ship are tested and are reaching a hash rate of 4.5 - 5 GH/s if the power supply is good. Most of the devices are between 4.6 and 4.8 GH/s some are above or below this hash rate.
I'm testing the devices for at least 1 hour and if they are not reaching 4.5 GH/s they are sorted out (e.g. I sorted out a device which reached 4.44 GH/s after a couple of hours).

Got my two puppies in the mail today ;D Very FAST delivery!!

Up and running in notime and they'r FAST!!
Right now on a Win7 64 with bfgminer 3.8.0. Will try later on my RaPi.

http://www7.pic-upload.de/thumb/10.12.13/arcref2524g.png (http://www.pic-upload.de/view-21587823/2013-12-10_171437.png.html)

Thank you aauer1 !

Which USB HUB can you recommend for use with RaPI?

I have an erupter working and need a HUB for the fresh shipped Twins. I only have a normal 4-Port USB 2.0 HUB with 1A. I Think to Anker 7+1 Port or the new one 9+1 Port (power port with 2.1A).

Which one works with RaPi....?

I haven't try the RaPi yet! I will probably do tomorrow. Right now I have a ExSys 7 Port USB 2 Hub with 4A PSU.

I think 4 port with 1A AND 9 Port with 2.1A is nod enough !! And the RaPi does afaik not work with USB 3 !!

The 2.1A power port is only 1 port, the PSU has 12V 5A.

Will RaPI work in USB 2.0 mode with such a HUB?

I wait for your test tommorow :)

Ohh ... I see :-)

RaPi does def. work with USB2 ! I had 2 BlueFury running on my RaPi without any Problem!
The question is: Does Minepeon with bfgminer support the Twin's ??

We will find out ;-)

I compile bfgminer from git on my RaPI now, TwinFury is enabled, hardware should come next 2 days.

Thank you andreas for that wonderful howto :)

small edit: block erupter (BEE) does not support temperature measure?

Good morning,

I may have something interesting for you. Yesterday evening, I was working on a new firmware version for the Twinfury miner which will support changing the supply voltage for the Bitfury chips. So, you will be able to increase the supply voltage by software to reach a better performance but then you may need some fan to cool the device. The newly set voltage level is saved in a non-volatile memory. That means when you unplug your device and reconnect it, the voltage will be set to the previous value.

The drawback of this software update is that it requires also a very small hardware modification. You need to add one resistor.

You can see in the picture below that bfgminer provides an option for changing the supply voltage and also shows the actual voltage level. Valid voltage range is 800mV to 950mV.


When I'm finished with testing the new firmware, I will try to get it into luke-jr's bfgminer repository. I will also write a small and detailed instructions manual for updating the firmware and adding the resistor.

Great news !! Can't wait to try this new cool feature !!

its still 400$ unit? i would pay 2200$ for 10 pcs.

On ebay, they go for OVER € 500.00 !!  :o

bullshit

??

http://www.ebay.de/itm/281224172969?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

it was just a greedy guy

Probably  ;D

I would not pay that much ... ;)

OK guys. Both Twin's running now on RaPi with MinePeon V. 0.2.4.2 and bfgminer 3.8.0.
Speed ~10+ Gh/s and Temp. 20 - 30 °C with activ Fan cooling! ;D

Next step: replace 1 resistor to modd the puppies ....  ;)

Great. Thanks for reporting. *thumbs up*

I have a question for you guys. Who knows how to sign a driver for Windows.

Installing unsigned drivers in Windows 8 not an easy task.

http://msdn.microsoft.com/en-us/library/windows/hardware/ff552289%28v=vs.85%29.aspx

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 ...

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 ;)
Think, I have to do the second one also with an 6.8k ....

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

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

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 (http://minecoin.net) website.

For all of you, who are interested in tuning the Twinfury, I posted one method on the minecoin.net (http://minecoin.net) website. This is the kind of tuning atomar has successfully tested.

OK. Here we go with the stats:

Uptime: 15 Hr

http://www7.pic-upload.de/thumb/14.12.13/v1g328tbgczc.png (http://www.pic-upload.de/view-21619999/2013-12-14_065852.png.html)

Big question now: What's better; more Mh/s OR less error ???
On one of the Twin's I have to change the resistor....

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

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

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

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.

Cool !! Thank's for the Explanation !

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

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

Right now there are 30 in stock !!

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

next time i will take express, send last monday and runs upto 10 days ;)

I'm happy to see, that the overclocking works fine. Can you touch the heatsink and did you have a fan to them?

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.

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.

The hub looks well.
Does it use USB2 with much more power or support it USB3?

Price and delivery time plz ;)

I have to buy a new hub, so i can buy it from you and report.

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

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

Link ?? ;-)

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.


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).

I just ordered one device yesterday, hope that i get it delivered soon, i will post a feedback here, if the delivery is okey, and how the stick will work.

Hope to get it fast =)

Best regards
Pseyco

On the Canadian page, the stupid BFL 5-6GH are running for $600 so I'm guessing this get's close.
Need to buy two motherboards. so want some money back as I doubt I'll use this.

Hello.
Because X-mas holidays are coming, I would like to tell you that we are closed during the holidays. The last day for ordering some Twinfury miners which will be shipped before X-mas is on Dec 19th till midnight European time. All later orders will be shipped not until January 2nd or 3rd.

So, keep that in mind if you consider to order some of the Twinfurys.

Happy holidays Andreas.
Thanks for the twin fury, they arrive today. I have some problems with my old hub, the new one comes on 18.12.
Now both are running fine on 2 machines :)

Come good to the new year!

Two Bi*furies: BiFury   9.83 GH/s   32304 (99.64%)   116 / 52 / 0   0:00:07
:-)

Do you have Bi*furies or Twinfurys?

LOL, wrong thread ? I have Bi*furies, blue heatsink.

A bi•fury is red to my knowledge:)

LOL, wtf do I have ?
Oh, I do have Twinfuries. Better change the name on BtcGuild ;-)

Lekker bezig...;)

Ja idd, jij ook trouwens!

Candy red, best for Christmas :)

And still available :)

As a Christmas special, we have reduced the price for the Twinfury. Today and tomorrow, the price is 250 EUR/unit.

Nice if there would be a Euro payment;)

But in BTC it got a lot more expensive the last days and hours...

:O What about us still waiting on ours in the mail, how bout some x-mas BTC refund love ;) Especially at the 60 euro shipping!

Who is us? Please write me an PM with your order number and name. Regarding the 60 EUR shipping... if you are one of the US/Canada customers who bought at the very beginning, I already offered you a refund of 20 EUR because fast shipping with DHL wasn't possible. Some customers specified a PO box as delivery address and this isn't working with DHL.

Well just me :) I paid 290, plus 60 shipping. A refund would be pretty awesome. I mainly purchased to play with it for a few day's as I've never had a usb miner, and than flip it on ebay. Than market tanked and doubt I'll break even at this point :)

Order #123 (would seem all your email went to spam)
1EfnNT4DakqdgZHWHTrE4uGji8LrE7SaNj

Happy Holidays :D

Twinfury at 240 Euro atm on minecoin.net :)

nwoolls has written a great how-to for running the Twinfury miner on Mac OS X:

http://blog.nwoolls.com/2013/12/28/bitcoin-mining-on-mac-os-x-twinfury-asics/

Many thanks to nwoolls!

We are back from the holidays and are ready to take your orders. We also lowered the price to 240 Euro.

Very important... we modified all the remaining units to support the voltage scaling feature. This means that you can adjust the supply voltage for the Bitfury chip by software.

A higher voltage level means the Bitfury chip is probably hashing faster.
A lower voltage level means the Bitfury chip is probably hashing slower but is more stable with USB 2.0 ports.

The feature is available from bfgminer:
Press M, select the device with the cursor keys and press V to adjust the supply voltage. You can enter the voltage in the range of 800mV and 950mV. But you will need some active cooling fan if you increase the supply voltage.

I almost forgot to say that we are slowly running out of stock. We have only about 50 units left!

And we enabled the discount if you order more units

• 5% discount if you order 5-9 pieces
• 10% discount if you order 10+ pieces

5 GH für 240 Teuro?????

Die Östreicher sind ja noch unverschämter als die Ami's  ;D

Wer lesen kann, ist klar im Vorteil:

https://products.butterflylabs.com/homepage/10-gh-s-bitcoin-miner.html

If you want something that works and is delivered sooner than later. You are much better off with Twin BitFury vs BFL any day of the week. How much will that BFL make you in 2 to weeks or more vs something in your hand in a few days? RMA wise I bet you dollars to donuts that Andreas will be responsive unlike BFL who rarely gets back to people promptly? Support? Andreas designed these units and he will be there to support them. BFL? Not as much. The quality of these USB miners are not going to give you issues but the BFL products unfortunately have had a significant number of failures and under performance well documented here in these forums. The PSU's that BFL supply are potentially a fire hazard given the post on one flaming out and almost electrocuting one customer be very careful. Price is not the only factor and BFL is not the company you are looking for.

You get what you pay for SwissMiner and when you buy with BFL you are taking a much bigger risk than with Andreas.



https://bitcointalk.org/index.php?topic=349057.msg3738021#msg3738021 <-- PSU Brick Melted Wires.


BFL Official Response



https://bitcointalk.org/index.php?topic=86854.msg4037455#msg4037455 <-- PSU FIRE.



---------------------

TwinFury USB failures?  0.


Be safe. Think long and hard about your purchase.

You're absolutely right!! I bought 2 Twin's when they came out and they JUST WORK !
They are "Plug and earn"

Hello,

I published a new post on the minecoin.net (http://minecoin.net) website about the firmware update for supporting the supply voltage scaling of the Bitfury chips. If you are interested, have a look: http://minecoin.net/firmware-update-for-voltage-scaling/

Any other news/changes with that Firmware ?? Should we update the first serie of TF also ??

@Aauer1
Hast Du meine Email bekommen ?? ;-)

If you want to use the voltage scaling feature (which requires to assemble a resistor), you should update the Twinfury.

Maybe, some of you have already noticed that we lowered the price again for the Twinfury.

Can you please provide a link to download the updated firmware ? My old eyes can't spot the link for the mentioned archive Twinfury-Firmware.tgz anywhere...

Here it is: http://minecoin.net/wp-content/uploads/2014/01/Twinfury-Firmware.zip

I guess I missed it to post it into the post. Sorry for that.

Hello

I'm Vincent from China. I have electronic product factory and interesting to expand business to bitcoin usb miner product. After following your project about bitfury , I want to make this product for you and sell it together. I can help you make in batch on my cost. 0% investment from your side.

How advantage you got after let us join ?

- You can make your project on zero investment from now and zero invest for batch producing of the product you want to make.

- you will got money from each pcs of USB miner we sold out.

- you can sell in other channel by yourself but that buyer can not buy from you and sell back on the same channel as us.

How about this offer ? Please let me know your idea.

regards

Vincent

A friend of my is sending two unit to tryout.
Will this still make any money if i used sha256 switchpool in stead of bitcoin?

Hi,
i just bought a used Twinfury.
I installed the Driver on my Win7-PC and startet mining using BFGminer.

Sometimes a get a couple of "query timeout" Errors.
Is that normal?

If the miner is working the temp reaches around 70°C
What is the max temp?
What if it`s getting hotter then the max temp?
Will it should down by itself?

Do i have to set some Settings at the device-manager like baud, databit, Stoppbit, ....  ???

Are there any BFGminer sepcific commands i have to use?
Or is there any Manual out there?

Regards
habich

http://youtu.be/aMcJD8_zEyI
 ::)
Nice rig people!

Hey there

I really need help, i bought 2 Twinfury Miner, they mined now for long time, yesterday one of the two stopped working.
Wenn i try to start bfg miner whit the stick plugged, only yellow led on stick is shining, and bfg miner dont find the stick.

I tryed to reset the stick whit the buttons on it, also not working. If i reset it red led is shining, the start bfg miner, and it switches back to yellow led, and miner software can recognice it... im so tristy that my twinfury is dead.. pls help =)

I testet it on different systems, and miner-software.

Can anybody help me?

I have just bought 2 of these miners off someone and one works fine all four lights light up but with the other one when I plug it in the green and two orange light up only and then when I launch my miner the green goes off and the red comes on and it won't give me any hash at all?? Anyone know what that might be from or how to fix it?

these units need good usb hubs.  how are you powering these?

I can answer that question.  You best need a industrial hub, i made a video last year unpacking mine. (got them from eyeboot.com)

https://www.youtube.com/watch?v=EnUAMliOi1g

https://www.youtube.com/watch?x-yt-ts=1422579428&v=oVBfxoPeBWE&x-yt-cl=85114404 (https://www.youtube.com/watch?x-yt-ts=1422579428&v=oVBfxoPeBWE&x-yt-cl=85114404)

Thanks mate I was originally just testing them to make sure that they worked since they were used but I figured that it was the power consumption that was happening making it not work properly and after a little google searching I came to the same conclusion that you did and already ordered myself a good industrial hub last night :) Thanks so much for helping me out though :) Cheers

The Dipo 19 or 10 port hub would be a good choice. They come with their own power supplies (110-240V) and all the cables you need so are ready to use out of the box. 10 port hub comes with wall mounts too.