Damn not another one! Definitely will never skip on insurance and tacking.
The coin has been sent as a tracking letter that is with a follow up service. The last event recorded was the sorting center on the 02/06...It is not Blazed fault, it is without doubt the Post Office fault. However, i don't know if the post office lost  it or steal  it. I'll probably never know  |
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Who is this man drawn on the note  |
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Hello everybody, I came across this item: http://www.ebay.co.uk/itm/0-3-BITCOIN-Gift-Certificate-Free-Tracked-Delivery-BTC-/272499928843I spoke to the seller and it turns out that he is indeed selling a physical bitcoin note with a public and private key on it. However, he didn't answer me if the private key is hidden or at least if there is a way to know that no one already had access to the private key. Also, do you think that this kind of item may have an interest in itself (collectible purpose). Thanks for your thoughts, Best Regards. |
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Not really...The scans from Mike prove he made some coins with those first bits. If someone make fakes and uses the same first bits then PGP chains show who owns the real ones.
Here is the example...
-Silver Coin first bits of 123abc is created by Mike and sold with scans to someone.
-Someone creates a fake Cas coin using same first bits of 123abc
I have the coin with a PGP chain and you have the other one with no chain....which coin is real? The one that shows a chain is obviously the real coin. The entire point is to deal with fakes should they hit the market.
I assume a scammer could easily buy a coin with a chain and then make a fake coin with the same first bits. Since the PGP chain is just a file, it is very easy to duplicate. In that case both coins would look legitimate. If my assumption is correct then the PGP chain is, IMHO, useless. Jeff. |
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Hello notlist3d  I am in US only Europe one I used was - https://www.bitshopper.de/ . It was to get a Europe compac model. It was a nice addition to my collections. One thing to keep in mind is when you look at Europe resellers the Vat/Import tax is pretty high so miners sell for higher. One thing you might look into is hosting center somewhere without the vat unless you have a extremely cheap or "free" electricity plan. A 20 percent or so vat can make it hard to ROI in some cases. Living in the US you shoundn't have to pay for the european taxes. In fact, it is your local US authorities who might decide to tax your parcel. That beeing said i heard that under a certain value (pretty high, but don't remember exactly), no customs duty/taxes are asked to us citizens. Jeff. |
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Hi Jake36  If I remember right, WU = work utility or something like that.
Ok, thanks for the clue. A google research with "cgminer work utility" gave the me the following: https://bitcointalk.org/index.php?topic=424095.0
Give the pot a little bit more of a turn on the low one and see if WU increases.
I tried. However i didn't notice any real change. Does it mean that the miner is faulty?
And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.
In my case both the Pi and the Hub have their own PSU.
The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.[/color]
Thanks for the information
IE: power from the Pi port going out ---><--- power from the hub port going out, so power coming from two sources on same the cable.Hi Jake36, Thanks for your message. It turns out that the "WU" is still low even when i plug the weird compac directly on the Pi (without using the HUB). Moreover the HW errors are very rare. I mean how is it possible to have a low "WU" with very few HW errors? Cheers, Jeff. |
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Hi Biodom, Superbpag also works on pi zero using a nonpowered usb 2.0 bridge (i used cheap 4 port Sabrent) in between.
Lucky you It looks as if you managed to get a Pi Zero. Even in UK it's nearly impossible to get a copy of the MagPi. Last week, while i was looking through severals computer science magazines in my local newsagent here in France, no less than 3 people asked me (although i don't work for the store...), if i knew a way to get a Pi Zero  |
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You won't make anything.
It is not worth mining with a raspberry Pi,
Unless you are willing to use a 10000 block erupters.
I'm aware i won't get rich. Just buy an ASIC man.
I my opinion, it's not as simple as that. First, the lattest Asics are quite expensive and the electricity consumption of such devices are much higher. My goal, ATM, is to understand better BTC mining... In fact i really wonder, whatever the devices people are mining with, if it's still possible to make profits... I mean, even a Antminer S7 won't probably be sufficient in one or two years. Does anyone share the same opinion? Cheers, Jeff. |
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Hi Jake36 If I remember right, WU = work utility or something like that.
Ok, thanks for the clue. A google research with "cgminer work utility" gave the me the following: https://bitcointalk.org/index.php?topic=424095.0
Give the pot a little bit more of a turn on the low one and see if WU increases.
I tried. However i didn't notice any real change. Does it mean that the miner is faulty?
And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.
In my case both the Pi and the Hub have their own PSU. The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.
Thanks for the information |
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Hi everybody Although it might not be related to the slight trouble described above, it noticed on the Cgminer window console that the figures in front of "WU" (in the far right of the screen) one of the compac (i currently run three compacs) does not look like the other figures. Here is what i got: Compac 1 WU: 166/m Compac 2 WU: 162/m Compac 3 WU: 45/m (only ?) I set the frequency at 210 Mhz and the hash rates of the compacs are all between 9-12Gh/s Btw what does "WU" stands for Have a great day Jeff. |
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What kind of USB hub do you use? (USB? 2.0? 3.0?)
USB2.0
And does it have an external power supply?
Yes. Here is the HUB: http://us.dlink.com/products/connect/7-port-usb-2-hub/I used to have weird behavior from my compacs when I just got them and it solved when I increased the voltage on them (via the potentiometer/screw), but I use an external-powered USB 2.0 hub from orico. I didn't increase the voltage too much because I don't have a way to actually measure the voltages now. If your hub doesn't have external power, or if it is cheap, maybe you need more power to make the sticks work OK. As you can tell I'm just learning, but one way of getting more power to a stick if you don't have a good hub is using a Y-cable like this one: http://www.ebay.com/itm/221661361513Well it turns out that i encountered the same problem even if only one compac is plugged. Moreover, i never got any troubles when i (hot) plugged the three compacs on the HUB while the RaspberryPi is running, so it might not be a power problem. That beeing said, i recently bought this cheap item: http://www.amazon.fr/CARCHET-Voltm%C3%A8tre-Amp%C3%A8rem%C3%A8tre-Testeur-T%C3%A9l%C3%A9phone/dp/B00LHU0QRY/ref=sr_1_1?ie=UTF8&qid=8&sr=8-1&keywords=B00LHU0QRYAlso I've read somewhere that USB 3.0 hubs don't behave correctly sometimes.
I read the same... Cheers, Jeff. |
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Just got up :p
What OS are you using on the RPI ?
Raspbian ?
Minera image ?
I've had a lot of issues with the Dlink DUB H7, I'm just using it with my RPI and U3 now.
Hello zOU OS: Raspbian RapberryPi: the old B (not B+) version. Software: GEKKO-CGMINER (4.9.2) Cheers, Jeff. |
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No one  |
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It could be a crappy USB on amout of power. Have you tried running 1 instead of three?
That's what I would do is reduce amount of them and test it. See what happens. All usb hubs are not equal.
Even with one compac plugged on the HUB, it does not work. It only works when i plug the compac on the HUB after the Raspberry Pi is running. I also tried to plug the USB port of the HUB on the Raspberry Pi while the Raspberry Pi is running (having the compac already plugged on the HUB): it does not work either (even with just one compac). It is all the more strange so as the compac (with its serial number) appears on the boot screen (when i turn the Pi on, and when everything is plugged). Cheers, Jeff. |
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what freq are you running the sticks at ?
I had the same troubles whether i try to run at 150Mhz or 200 Mhz.
have you tried just unplugging the hub ?(power+usb) ?
Yes, but it didn't solve the problem... |
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If you which to save some milliamps of power, you should, IMHO, work on the miners side rather than on the RaspberryPi side. Just my 2 cents, although i could be wrong...
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