Amazon.com: BITMAIN ANTMINER U2 2Gh/s USB Bitcoin ASIC

To arms Bitcoin community! Help us to complete this mining installation for the Zürich MoneyMuseum. We are not asking for funds. Only your expertise needed! 20$ tip if you give us the relevant clue to solve or mitigate our main problem. Nice pictures of the exhibition inside as well…

Edit:
A big thank you to all people who helped us we can now mine true pps with diff1! The people in this thread which have helped most have been awarded. I want to mention also the operator of btcmp.com denis2342 and Luke-Jr.
Actually looking at the miner screen in the Linux terminal helped a lot ;-). The pool constantly resigned to stratum with variable difficulty. We can now mine true pps with diff1. Getwork with long polling seems to be default after disabling stratum...
We will probably post again, when there is a video of the installation in action...
Again many thanks. Learned a lot.
Edit: Thank you for all the answeres so far! We will try different things now and report back. Tip bounty will be distrubuted as soon as we found out what finally does the trick. Ths could take a few days. The offerd tip will be distributed and very likeley a few others as well.
First of all, let me tell you that the Bitcoin Exhibition at the Zürich MoneyMuseum is most likely the biggest and most diverse of it’s kind. Please read more about the museum and the exhibition below.
Help us solve the following problem we experience with our “Muscle Powered Proof of Work” installation:
Me and a friend have invested a lot of time to build an installation for the Museum. It is basically a 10GHash/s miner and RapberryPi which is powered by a hand generator (Maxon DC motor with planetary gear). Here are some pictures of the installation, although not entirely put together yet. There are still some changes planned.
https://www.dropbox.com/sh/0qcvl3wu4romhnt/AAAYF08lnVAy6W6KEepE7e2Ua?dl=0
Now let’s get to the core of our problem:
We are mining at the getwork diff1 pool btcmp.com as it is a true pps pool with getwork diff1. The visitors in the museum can power the generator for 2-3min and see directly how many Satoshis the "network" (actually pool but we don't want to confuse the visitors to much at that point) has given the museum for their work. This all works well so far but one problem remains. Sometimes the pool does not get a share from us for more than 40 seconds or even more than 60 in some cases. I have calculated that with 8.4 GHash/s we should find a share about every 0.5 seconds in average (diff1). I think when the pool gets a share it gets all the hashes as it then accounts for several Satoshis. Statistically we get per minute what we should get in theory. We would very much like to lower the time between the accepted shares by the pool, however. This would help to make the overall experience much smoother for the visitors.
Please look at this screenshot from MinePeon and answer some questions:
https://www.dropbox.com/s/lb1jei4trc9kqe5/MinePeonScreenshot.png?dl=0
We see that we get a lot of diff1 hashes. However, only 11 shares/packages have been accepted. The Is there a possibility to set the miner SW so it submits to the pool as soon as a share is found? It seems to send them in packages which sometimes have 4-5 seconds in between but sometimes a much as 80 seconds. I would like to submit packages of hashes much more often. How can this be influenced?
What exactly are the Getworks (GW)?
What exactly are the Accepted ones (Acc)? This is where the TipBounty is. Help us to get a better Acc/diff1 ratio. Best would be 1:1.
What exactly are the rejected ones (Rej)?
What exactly are the discarded ones (Disc)?
What exactly are the difficulty one hashes (diff1)?
Now some of these questions seem very very basic but it is important for us to understand what these are and how we can influence these. We have a 1:1 correlation between the Acc and the pool side acknowledgement of shares/packages. So whenever the MinePeon shows one more for this value the pool value for last submitted share goes to “moments ago”.
Does the miner SW have a setting where we can set after how many diff1 hashes a package of hashes is sent to the pool? If no, do you have another idea why so few are sent? Ideally we would set it so the diff1 hashes are sent every 5 seconds or so, probably even more often.
Is stratum with fixed diff1 possible? If so, would it be better to use stratum?
Are there critical settings if we should know of? (we have tried --request-diff and --no-submit-stale)
We are using BFGMiner on MinePeon if that matters. We could switch to CGMiner if that would help. Any help is very much appreciated. The museum is doing a great job explaining Bitcoin basics. We had special focus on interactive learning and have several things to underline this.
I hope to hear back from you so we can improve our installation. Please don't hesitate to ask if you have further questions. We are both not mining experts.
Thanks for reading and AMA.
SimonBelmond
Current features of the Bitcoin exhibition at the Zürich MoneyMuseum:
Current Features:
  • Life screen with various stats/charts/parameters/transactions…
  • Printed infographics.
  • Muscle powered PoW: Hand generator with 5v and 3.5-5A output, Raspberry Pi, MinePeon, 5x Antminer U2+ plus a screen to show the hash-rate at the pool and/or in MinePeon web interface. This screen will not be hand powered. This installation will complement their coining die (go to 1:27 to see what I mean).
  • The Bitcoin mining evolution (CPU, GPU, FPGA, ASIC)
  • A few short (2-3 minutes) interviews.
  • Other wallets, Trezor, PiperWallet
  • ATM Prototype, functional
  • MoneyMuseum Bit-Cards
  • PiperWallet to use.
  • Casascius and other physical Bitcoins, Wallets (also some commemorative coins), Paper wallet like one out of the first Bitcoin (A)TM ever
  • Bitcoin Quiz
  • 12 Picture tours
    • Bitcoin for beginners
    • Bitcoin advanced
    • Debunking 13 Bitcoin myths
    • What you definitely have to know
    • The history of Bitcoin
    • Bitcoin und traditional forms of money
    • Alternatives to Bitcoin
    • Citations about Bitcoin
    • How do I open an account?
    • How do I get Bitcoin?
    • Bitcoin community and economy
    • Bitcoin as a platform
I see this as a good opportunity for Bitcoin, so let’s embrace it. I am especially excited to compare the traditional forms of money which used proof of work to the new money which also uses proof of work. I think in that context it will be much easier for the visitors to value this concept.
A lot of schools and other groups book guided tours at the museum. It is open on every Friday from December 05. On. Entry is free of charge.
Edit:Markdown, typos
submitted by SimonBelmond to Bitcoin [link] [comments]

[USA-ME] [H] Gridseed (Scrypt), Antminer U2 (Bitcoin) USB ASIC miners [W] Paypal

http://imgur.com/a/Q1EV0
Perfect for learning about how ASIC mining works, or just playing with bitcoin/litecoin/dogecoin mining. Just a note that these devices are working but I can't really offer support on them, but are being sold as working properly.. anyway. Prices shipped in US.
2 1 Gridseed - $30 each One without fan is available.
Antminer U2 - $40 sold
The two gridseeds (one has a fan installed, other does not) are technically dual purpose. You can mine LTC or BTC with it. I only did LTC which is low power (6 watts). Run around 330 Kh/s LTC. I didn't use the BTC but i believe those run at about 6 Gh/s in bitcoin mode. But then they end up using about 60 watts a piece. Fan isn't really needed running in LTC mode. BTC mode it gets a bit hotter and would need the fan. Includes a little 12v wall wart for each and USB cable.
The USB Antminer U2 runs at about 2 Gh/S running off of USB power.
submitted by zenless8 to hardwareswap [link] [comments]

Unsure if scam or mixup. Need other input on BitcoinWare.net from experienced buyers.

My boyfriend and I recently got into mining and planned to start small and get bigger. We saw that BitcoinWare.net had a Canada Day sale with free shipping and a sale on Antminer U2 units, so thought that it would be a good place to start with minimal investment. So we dropped $60 on 3 units, received a confirmation email and could check the status on the website.
A few days after that though, I received an email from them saying that they had over sold the U2 units and asked if I would rather the option of: a) a full refund. b)wait 1-2 weeks for the units to restock for shipping. or c) to change my order to another item on their site using the already paid money as a credit towards the purchase.
We opted to wait for the U2 units (as they were $20 a piece), and sent them an email immediately.
almost 2 weeks went by without word back from them before my boyfriend noticed that the U2 units on their site were in-stock. So we sent them another email inquiring on the status of our shipment and within 2 hours we received 2 emails. an email confirmation of shipping and one stating that they apologize for the delay and asking if we received confirmation that the shipment was sent. We responded that we received confirmation and that we were happy with the timeliness.
That was the last time we had heard from them.
Within a week we received the package, but upon opening the package, there were 3 units, but all of them were U1 units, Not U2.
We immediately emailed them inquiring as to what could have happened and if there was any way to remedy the situation. However, that was over a day ago and we have not received word from them in any way.
Their website is only 4 months old, about as old as their Reddit User account u/bitcoinware .
TL;DR Paid for 3 U2 Antminers from BitcoinWare, received 3 U1 units after asking what happened to our order.
Has anyone else had similar experiences with this seller or any sellers like this? If so, what happened? and what do?
Edit: Finally heard back from BitcoinWare.
Hello,
We received your emails and contact form submission, sorry for the delay in responding. The U1/U2 are the same thing. They both use the same chips and can achieve the same hash-rate in our testing with the same settings. The only difference is the shape of the heatsink. Since the factory does not make this product any longer, they were shipping both types in the same batch just with different heatsinks for the last shipment.
Please note it states on the product page: "The color and the shape of the heat-sink and product appearance may vary slightly from the pictures."
If you are not satisfied, you can return the products for a refund. Alternatively we can provide you a discount for future orders if there is a problem with the products you received. Please let us know how you would like to proceed.
Best regards, BitcoinWare
...Pretty sure this is a scam now...
What I got.
What they are advertising.
Receipt that came in the envelope with miners
Edit2:
So BitcoinWare has sent me an email saying that they would be willing to offer a full refund with the option of keeping the units because I was unsatisfied with what I had received. The reason is due to the information they were provided by their supplier, so they did not intentionally misrepresent their product as U2s. Previous clients apparently where fine with what they received so it had never been an issue for them before.
I've replied asking to settle instead on $6 off the total order ($2 a unit) for the cost of purchasing proper heatsinks for the units and materials to attach them so that I'll be able to get the 2GH/s promised on their site. I have yet to hear back.
I think in the long run I don't believe that these people are a scam, but it's probably best to get confirmation of product prior to shipping in the future.
Final edit: They sent me a $10 refund so I can buy heatsinks so that's all settled with.
TL;DR: Though their supplier sounds sketchy, BitcoinWare is not a scam and are just really slow at getting back to you. Confirm before ordering, but you will get products.
submitted by thelostzelda to BitcoinMining [link] [comments]

Help with Antminer U2 setup on ubuntu

If this is not the right subreddit please let me know and please point me in the right direction.
I just received an Antminer U2 from a friend and he gave me install instructions for windows but I run Xubuntu. I have only found set up guides for the U1 and I am not sure if I can use that for the U2. This is my first time trying to mine and I am sort of at a loss. Thanks!
submitted by MRHURLEY86 to BitcoinMining [link] [comments]

Block erupter issue

I have looked over google for some help but im obviously not looking in the correct places because I did not see what i need. Hopefully someone here can point me in the right direction. Here is whats going on. I started off with 1 asic block erupter (ASICMiner Block Erupter USB 330MH/s Sapphire Miner) and everything was going fine. i added another one to the setup and everything was still going fine. (this is all being done on USB ports that are on the back of my PC, no USB hub, yet) I then aquired an antminer (BITMAIN ANTMINER U2 2Gh/s USB Bitcoin ASIC Miner. Overclockable) and plugged it into my PC as well. I am using BFGminer 3.10.0 currently and everything was running fine. all 3 miners were mining. I went ahead and ordered a usb hub because i figured if i was going to keep adding miners that my computer would not be a good place to put them all. well a day before the hub got here, i noticed that one of the miners (the saphire one) was not mining. i looked at my device manager and only saw 2 of them. so i rebooted, messed around with some different ports but nothing made that one work. i figured it was broken for whatever reason and assumed it was because it wasnt suppose to be on my mother board. thing is, it works on another PC. so i waited for the hub to come in to see if it would work on there but it still does not. Im thinking its a driver issue since its not showing up on this computer but it will on another. Any idea or suggestion on how to get my current PC (windows 8.0) to run it? Should i try a different version of bfgminer, or maybe cgminer? im fairly new to all this so i dont really know where to go with it.
submitted by linkevolve to BitcoinMining [link] [comments]

Which ASIC would you recommend, if any? Moreover, would you recommend them to a novice miner as a learning experience?

Hey /BitcoinBeginners,
I come to you as a novice, eager to learn. I've been quite excited to somehow join the ranks of those who have embraced crypto-currencies. Not only does it hold a lot of promise for the future, but it seems like a very interesting endeavour. I've had a few barriers to entry (can't find a single reasonably priced 6950/6970), so I can't partake in a big way. However, I'd still like to try my hand at it in an educational manner.
This is where my question comes in. I've got a Raspberry Pi lying around and I've found a guide to turn it into a simple and cheap mining rig. The guide requires an ASIC, and I've found these ( 1 & 2 ) two. Would anyone vouch for either? If not, I'm open to suggestions and advice.
Many thanks in advance.
submitted by AmantesSuntAmentes to BitcoinBeginners [link] [comments]

[WTS] Antminer U2s (2.0GHs) - $20 each

Uncle Bubs is selling three Antminer U2s. These are USB sticks that mine sha256 currencies at 2.0GHs (manufacturer recommended, although I run them at 2.2GHs with no problem), using almost no power (2 watts). Included when you buy from me is a quick start kit, including BFGminer preconfigured to work with your Antminer, the device drivers, and a tutorial on how to start mining. All of my miners have been tested to verify they work and overclock properly.
Antminers can be seen on Amazon here for $27.50; I’m selling mine for $20 plus $1.99 shipping, or free shipping if you buy all three. The price is the Coinbase price in USD at the time of sale. Ships to the United States only.
Uncle Bubs accepts Bitcoin as payment; contact me at [email protected].
Or, if you’re more comfortable with credit card transactions, you can buy them at my Ebay auction. Note that, while you may see some on Ebay for around $14, those are auctions. Having tried and failed many times to buy something from an Ebay auction only to be outbid at the last second (literally the last second), I only use “Buy it Now” now.
Antminers will mine any sha256 currency, including (but not limited to):
submitted by lecherous_hump to BitMarket [link] [comments]

Best Bitcoin Mining Software for PC 2020 Mining 0 5 BTC In 3 minutes How To Mine 2.1 BTC In 3Mins - BITCOIN MINER PRO 2020 The Latest Bitcoin BTC Miner! Bitmain Antminer T19 84 Th/s Review Bitcoin Mining Antminer U3 - CGMiner Tutorial Coolest Bitcoin Mining Miner - Liquid Cooled Experiment

Bitmain Antminer U2. Cost: $49.97 (used) Bitmain is the biggest player in the crypto mining market. The company produces all sorts of mining rigs intended for a variety of PoW consensus algorithms. The Antminer U2 is another great example of its diverse product lineup. As of October 3, 2018, the Antminer U2 only had two reviews on Amazon. Antminer U2 Bitmain V1.2 ASIC USB Bitcoin Miner BTC Mining (black). Condition is Used. These have the heat sink on the back. Working condition. Can be overclocked should you choose. Comes in original case. Pickup only. In Houston, staying at the Red Roof Inn on 12929 Northwest Freeway. do NOT contact me with unsolicited services or offers Antminer U1 Mining W/ The World’s Smallest Bitcoin Miner – Worth the Money? Antminer U1. January 23, 2019 admin Investing In Bitcoin 42. THE NEW TWITTER: STOCK POLLS, NEWS, ETC. Pledge $1 and BECOME A TECHCRACKHOUSE DWELLER TODAY! Subscribe to Get more stuff like this. AntMiner U2 USB BTC Bitcoin ASIC ant miner 1.6GH/s Overclock 2.2GH/s AntMiner For business-only pricing, quantity discounts and FREE Shipping. Register a free business account; than this device is for you. You can learn mining, programs, cloud mining and all about mining with this device. (you can learn without this one too ofcourse Antminer U2's can only mine SHA256, so basically Bitcoin only. You also will make pennies using those. Dogecoin is SCRYPT so you need a SCRYPT ASIC. You might be able to use a GPU still; I'm not sure it's worth it though. I would also avoid buying any currently existing SCRYPT ASICs. Darkcoin is X11 so you would need a GPU.

[index] [9201] [13051] [9485] [15429] [28947] [19684] [12502] [5182] [26935] [10005]

Best Bitcoin Mining Software for PC 2020 Mining 0 5 BTC In 3 minutes

How to Set Up a Bitcoin Mining Rig w/ BITMAIN ANTMINER U2 & CGMiner - Duration: 16:19. Rasim Muratovic 189,185 views. 16:19. How to set up antminer u3 windows 7/8 - Duration: 3:07. Bitcoin Mining Rig w/ ANTMINER BITMAIN U2 & CGMiner - Duration: 2:09. Rasim Muratovic 7,174 views. 2:09. USB Asic Miner Red Fury bitcoin miner 2.4~2.9 GH/s ~new and improved version~ - Duration ... Once Bitcoin Antminer Pro is up and running, simply choose a mining pool (we recommend using AntPool, to receive the most Bitcoins), setup your login details and hit "Start Mining!" to begin ... Top List only 80-90% new AntMiner T9+ 10.5T miner 16nm BTC Bitcoin Mining machine from bitmain T9 plus 10.5Th/s Price: $199 Discount: 6% Receive the Special Price HERE :: This is an experiment using an AntMiner S9 in a fishtank! Please know that this is an experiment and is solely for learning and experimentation purposes. The viability of bitcoin mining comes from ...

Flag Counter