Share Include 4-Year Protection for Include 3-Year Protection for 4-Year PC Peripheral Protection Plan Learn more 3 Year Asurion PC Peripheral Protection Plan Learn more or Use this location: or Price: & FREE Shipping.Details Sold by Eyeboot and Fulfilled by Amazon.Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products.New (1) from $150.00 Details Block Erupter 49 Port USB Hub & FREE Shipping.What other items do customers buy after viewing this item?2,784 Rev 2 GekkoScience 2-Pac Compac USB Stick Bitcoin Miner 15gh/s+ (BM1384x2) 8 14 Sabrent 13 Port High Speed USB 2.0 Hub with Power Adapter And 2 Control Switches (HB-U14P) 824 Compare to similar items Sabrent 13 Port High Speed USB 2.0 Hub with Power Adapter And 2 Control Switches (HB-U14P) Eyeboot 49 Port USB 2.0 Hub 40 Amp 200W 5V Enclosed Power Supply USB 3.0 4 Port Hub (7) (824) (0) (1) $.

Eyeboot Eyeboot OutletPC 4 Read more Read more Read more Product description Used for a month still works great, Ask me about a 30 amp power supply that will run 49 block erupters at once.bitcoin echeckI will undercut any other online prices you may find.elveszett bitcoinUsed for a month still works great, /Product/Product.aspx?Item=N82E16817139005)bitcoin armory (etotheipi)Product information Product Dimensions 10.6 x 6.2 x 1.6 inches Item Weight 1.4 pounds Shipping Weight 1.4 pounds (View shipping rates and policies) Manufacturer ASICMiner ASIN B00GCQQE42 Origin Made in USA or Imported Item model number LYSB00GCQQE42-ELECTRNCS Customer Reviews 4.8 out of 5 stars Best Sellers Rank #71,738 in Electronics (See Top 100 in Electronics) #850 in Electronics > Computers & Accessories > Networking Products > Hubs October 31, 2013 Warranty & Support Product Warranty: For warranty information about this product, please click here Feedback If you are a seller for this product, would you like to suggest updates through seller support?

Would you like to tell us about a lower price?See questions and answers 75 star86%4 star14%See all verified purchase reviewsTop Customer ReviewsMUST HAVEGreat hubGreat product.Good Lord the BTC champs.Four StarsFive StarsWorked wonderfully.Search Customer Reviews Set up an Amazon Giveaway Learn more about Amazon GiveawayBitcoin mining has evolved rapidly over the past few years.From CPUs, to GPUs, to FPGAs, to ASICs, the most up-to-date and powerful miners change constantly.When the first ASIC miners were shipped to customers in early 2013, miners became incredibly more powerful than before.Among the first ASIC miners announced was the Block Erupter USB: a small USB (Universal Serial Bus) that mines for Bitcoins.They were small, portable, yet relatively powerful miners, and were suggested as “a perfect gift for getting people knowing about Bitcoin and Bitcoin mining.” The colors included blue, silver, black, red, and yellow.The minimum order amount was 300 USBs, so retailers and group-buys were the main way to obtain one.

For group-buys, one person would buy the bulk order and sell a few USBs individually to different buyers.Today, Block Erupters can be bought solo or in bulk.The average price you’ll find for one is $4.00, usually from Amazon or eBay, although eBay tends to be less expensive.When the USBs were first announced, the Bitcoin mining difficulty was about 9,000,000.It is currently 40,000,000,000, so the difficulty has increased a whopping 444,344% since then.If you’re looking to make a profit, Block Erupter USBs shouldn’t be your first choice.With no difficulty changes, you’ll lose $0.13 a month.However, don’t count out the Block Erupter as a miner.It’s great for hobbyists and beginners to Bitcoin mining– it provides an experience of taking care of and analyzing the miner, which is a great start for those who are looking to use more advanced miners.If you’re only going to lose $0.13 a month using a Block Erupter, I think it’s a good miner to buy as a hobby and learning experience.

It allows you to experiment creating a rig, using safety precautions, and analyzing your earnings.These are all things you’ll do when buying more powerful miners, and the Block Erupter is similar in these regards.My first miners ever were Block Erupters; I bought 10 on eBay for $30.99 ($3.10/each) from a seller.The seller was very nice, and answered questions that I sent to him about the USBs over private message.I received the miners shortly after, and excitedly unboxed them.All 10 arrived in a small white box which were packaged inside of a larger box; each miner also came with a clear plastic casing.The Shipping Gods were kind, as each miner came in perfect condition.I plugged a USB into my laptop’s USB port and quickly learned that the miners get very hot very quickly.Within a few minutes, touching the USB while it’s been running will burn you.You probably won’t get a scar or any serious injury, but it hurts enough to sting for a minute or two.For this reason, I suggest buying a fan to run over your miners to keep them cool.

I personally use an ARCTIC Breeze USB fan; it does a good job of keeping the fans cool.I put it straight in one of the USB ports on the USB hub (more about this a few paragraphs below) and point it over the USBs.Tip: You may have heard that mining on a laptop is a bad idea and can destroy your laptop; this is true.However, you aren’t mining on your laptop when using a Block Erupter USB.You’re mining on the USB–– the laptop is merely what it connects to in order to log its hashes.Make sure you’ve turned off CPU and/or GPU mining on your mining program.I had slight difficulties with understanding some of the miner’s hashrates, but I later realized that it was because I was plugging two miners into my laptop at once (it has two different USB ports) and I was getting confused by which one’s hashrate I was reading on the computer.I ended up plugging them in individually one at a time, and each one reached the expected 333 MH/s +/- 10%.Before buying the miners, I knew that I would only be able to run two at a time because my laptop has two USB ports, and that wouldn’t be optimal: I would have eight laying around doing nothing!

The solution to this is buying a USB hub: a device that allows you to plug multiple USBs into it at one time.After about an hour of research, I decided on the Rosewill RHB-500 10-Port USB 2.0 Hub.I decided to buy one from Newegg, with Bitcoin of course!It cost $24.99 at the time with free shipping.I bought it at 1:30 PM one day and picked seven-day shipping, and it arrived the next day!When choosing my USB hub, a resource that I followed closely was a post entitled “Which USB hub to use with Block Erupters” BitcoinTalk.While the entire guide helped me make my decision, here’s an excerpt from it that was very helpful to me to check how many Block Erupter USBs a hub could handle: A good point of reference made by finlof: You need to have 2.5VA per device.So for example if the adapter says 5V 3A then you can power 15VA worth of devices which = 15/2.5 = 6.You really have to be careful with the USB hubs cause you could potentially mess up a device or computer if overloaded.Note further that, to be on the safe side, you should connect one less BE than what the theoretical max limit calculation above will give you, or run the risk if prematurely burning out the AC adapter.

The hub that I use is theoretically capable of supporting 8 Block Erupter USBs, although there are 10 ports.I’ve used a maximum of 7, other than for testing, during which I tried using 8 for a few minutes.Currently, I can only possibly use 7, as I’ve given away a couple USBs, and only have 7 left.I plug all of the miners in to the hub, plug the fan in to the end of the hub and run it over the miners, and plug the hub’s USB in to the USB port on my laptop.The next step is to open up the program you use on your computer to mine.I tried using MacMiner and Asteroid, but I was having troubles with both.I ended up using the command-line BFGMiner.I can now see the hashrate from all seven miners.Note that the miners are numbered 0-6, not 1-7.My current project is connecting the USB hub to a Raspberry Pi, a small computer.This will allow me to keep the miners running without leaving my laptop open.It will also allow me keep the miners stationary, as they will no longer need to move around with my laptop.

Currently, if I want to mine I need to either stay at my desk where the miners are running or carry the miners around with my laptop, which is bothersome.The Raspberry Pi will fix this problem.I used BTC Guild for my pool with the USBs.I averaged 2.40 GH/s, or ~0.343 MH/s per USB, a bit above the projected 333 MH/s!BFGMiner gave me live statistics on how my miners were doing.I see their hashrate and accepted shares, as well as a lot of other important information.I can also manage my miners from BFGMiner; for example, I have the ability to disable one.All in all, Block Erupter USBs are a good resource for beginners and people looking to get in to mining.They’re relatively inexpensive and a good way for beginners to learn about mining and taking care of a rig.However, if you’re looking for a profit, Block Erupter USBs aren’t for you– you’ll probably lose a few cents each month due to the electricity costs of running one.They also make for a nice gift or conversation starter.Good luck with your Block Erupter USB!