![]() USB 2.0 ports can provide exactly 500 miliamps which is equal to one erupter. I learned early on that having a 10 port USB 2.0 hub doesn’t equate to having 10 usable ports for Block erupters! If you are using an unpowered USB hub (that is a usb hub without an AC adapter), then you will likely be limited to 1 or maybe 2 erupters tops, this is why: Each erupter uses approximately 2.5 watts give or take. If your block erupter isn’t receiving enough power, the description mentioned above happens. Why does/do my Block Erupter(s) flash then go solid, repeatedly? Without further adieu, here is my list of problems to look for with Block Erupters: ![]() (Don’t allow other single track minded folks to deter you into not buying hardware) In other words, you must think of the potential growth factor built into mining both bitcoin and altcoins because while it may only net the equivalent of 2 cents per device today, that same value of bitcoin could easily jump to 4 cents, 20, cents, or even 40 cents per device per day! Perhaps it could even jump to whole dollars if mining an alt-coin early enough and selling it back during the high point. However, I have had these since September and had always intended to mine an altcoin sha256 anyway. While most folks, myself included agree that as of March 2013, attempting to recoup 2 cents per day on a device currently listed at 30 dollars is very foolish indeed, had I started from today. The fact at hand though is this: I bought them and need them to run as often as possible to be able to recoup their investment. If you just want bitcoins then invest in serious mining hardware or just buy bitcoins.I’ve decided to pen this quick guide to assist folks who are having trouble with their block erupter setups! I’ve had this issue haunt me for the past month or so, but have largely ignored it due to the fact that I have other substantial hardware working around the clock to bother noticing. We don’t blame you, if you’re not impressed though! USB Bitcoin mining was only profitable when Bitcoin was in its early years. We just included it in this list since it's still technically a USB miner. It’s not a very good choice though in terms of $ / hash rate. However, via USB you can plugin it to your computer. The 21 Bitcoin Computer isn't the typical USB Bitcoin miner. What’s great in this is you can do some mining while providing internet for all your devices because it works as a wireless router. ![]() It's cheaper, but with that you just get a 5.5 GH/s, a low one which is a little over $1 per year. Bitmain Antrouter R1 Wifi Solo Bitcoin MinerĪlthough not exactly a USB miner, the Bitmain AntRouter is just similar. You just need to plug it into your USB port on any computer and also no fan is required. The Avalon Nano 3 is a 3.6 GH/s miner, which will earn you almost a dollar per year. It will yield you about $0.15 per month, which will give you more than a dollar in 12 months! The device runs completely silent, as the company claims. ![]() ![]() Just slightly better than the original block erupters is the GekkoScience miners. GekkoScience Compac USB Stick Bitcoin Miner This is the best choice if you want to see how mining works, but just the like with most USB miners, a profit should be least expected. They have 330 MH/s of hash power which will give you less than $0.01 per month. The first Bitcoin USB miners were the Sapphire Block Erupters. ASICMiner Block Erupter USB 330MH/s Sapphire Miner ![]()
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