Topic: [Announcement] Block Erupter USB - page 24. (Read 251998 times)
That does look promising, but odd that it puts out 12V, isn't USB spec'ed at 5V?
Anyone find a suitable USB hub that is powered and has enough spacing to allow for adequate cooling?
I found this one but the power supply only provides 2A @ 5V, meaning if each port pulls 500mA you'd only have enough power to run 4 USB Block Eruptors:
http://www.satechi.net/index.php/satechi-12-port-usb-hub-with-power-adapter-2-control-switches
Also saw this one, but could find no details as to its power supply specs:
http://www.rosewill.com/products/1604/ProductDetail_Overview.htm#/Mgnt/Uploads/ImagesForProduct/ImgPrd-1604-Cm[7d4d1f39bfc64a01b8705e5227fc75cf].jpg
Last this one, but the side ports don't seem useable. Also, no power supply specs either:
http://www.digitalinnovations.com/connect-charge-7-port-hub.html
I found this one but the power supply only provides 2A @ 5V, meaning if each port pulls 500mA you'd only have enough power to run 4 USB Block Eruptors:
http://www.satechi.net/index.php/satechi-12-port-usb-hub-with-power-adapter-2-control-switches
Also saw this one, but could find no details as to its power supply specs:
http://www.rosewill.com/products/1604/ProductDetail_Overview.htm#/Mgnt/Uploads/ImagesForProduct/ImgPrd-1604-Cm[7d4d1f39bfc64a01b8705e5227fc75cf].jpg
Last this one, but the side ports don't seem useable. Also, no power supply specs either:
http://www.digitalinnovations.com/connect-charge-7-port-hub.html
I'm going to use an Anker 10 port hub. 4A @ 12V. They make good quality stuff.
But the multimeter won't account for power supply inefficiencies, CPU usage, and lots of other stuff.
I was figuring they wanted to know the current draw at 5V to determine how many can by powered on a single hub, in which case, it is accurate and precise.
How much power is drawn from the wall is another matter.
Anyone find a suitable USB hub that is powered and has enough spacing to allow for adequate cooling?
I found this one but the power supply only provides 2A @ 5V, meaning if each port pulls 500mA you'd only have enough power to run 4 USB Block Eruptors:
http://www.satechi.net/index.php/satechi-12-port-usb-hub-with-power-adapter-2-control-switches
Also saw this one, but could find no details as to its power supply specs:
http://www.rosewill.com/products/1604/ProductDetail_Overview.htm#/Mgnt/Uploads/ImagesForProduct/ImgPrd-1604-Cm[7d4d1f39bfc64a01b8705e5227fc75cf].jpg
Last this one, but the side ports don't seem useable. Also, no power supply specs either:
http://www.digitalinnovations.com/connect-charge-7-port-hub.html
I found this one but the power supply only provides 2A @ 5V, meaning if each port pulls 500mA you'd only have enough power to run 4 USB Block Eruptors:
http://www.satechi.net/index.php/satechi-12-port-usb-hub-with-power-adapter-2-control-switches
Also saw this one, but could find no details as to its power supply specs:
http://www.rosewill.com/products/1604/ProductDetail_Overview.htm#/Mgnt/Uploads/ImagesForProduct/ImgPrd-1604-Cm[7d4d1f39bfc64a01b8705e5227fc75cf].jpg
Last this one, but the side ports don't seem useable. Also, no power supply specs either:
http://www.digitalinnovations.com/connect-charge-7-port-hub.html
The multimeter method will give you the exact current draw.
But the multimeter won't account for power supply inefficiencies, CPU usage, and lots of other stuff.No point in being precise if you aren't accurate.
Of course it is worthwhile as an academic exercise. I'm just pointing out that if you are going to be making profitability calculations that the current draw from the USB port to the miner isn't the thing you want.
Our group buy has 100 incoming already, already in Germany.
The rest is coming over now, mine included :p
100 already sent out to happy miners
+150 in germany @customs ;-)
Wait until the end of the year, where difficulty will be around 70,000,000
Emerald. My Sapphire isn't here yet.
What? We are way over the 15 days and way way over the 20 days promised for delivery. looks like you lot wont even make the change to 12.5m difficulty in 10 days!
How long do you have to be late before we can flame you as vapourware ala BFL ?
M
[/quote
Our group buy has 100 incoming already, already in Germany.
The rest is coming over now, mine included :p
Emerald. My Sapphire isn't here yet.
[/quote]
What? We are way over the 15 days and way way over the 20 days promised for delivery. looks like you lot wont even make the change to 12.5m difficulty in 10 days!
How long do you have to be late before we can flame you as vapourware ala BFL ?
M
[/quote]
What? We are way over the 15 days and way way over the 20 days promised for delivery. looks like you lot wont even make the change to 12.5m difficulty in 10 days!
How long do you have to be late before we can flame you as vapourware ala BFL ?
M
Does the Block Erupter require a USB driver? I'm running Win7 x64. Where does one download the required driver for it? Thanks!
I think it should be autodetected.If not, they are on this site: http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx
Does the Block Erupter require a USB driver? I'm running Win7 x64. Where does one download the required driver for it? Thanks!
Yes, using Ohm's law, but if you're going to do that you might as well just put an ammeter in line.
Edit: Because, virtually every single multimeter built in the last however many years (30?) includes both a voltmeter and ammeter.
Edit: Because, virtually every single multimeter built in the last however many years (30?) includes both a voltmeter and ammeter.
i have some - but i too lack the ammeter.
i think a few of those i shipped out should arrive tomorrow though.
I have some long ago recollection that current (DC) can be deduced by introducing a resistor and measuring the voltage drop across it.
Maybe I'll try...or would if I were one of the lucky ones receiving my device tomorrow
...
Thanks Kano.
You wouldn't happen to have ammeter and spare usb extension cable to measure current to device while mining?
Just curious if I can use 2.0 USB hub (5V & 4A) to run 10 of these. Looks like 8 is max.
Specs say 500mA (or 560mA) but the real world measurement might be different.
Sorry I don't have either.Thanks Kano.
You wouldn't happen to have ammeter and spare usb extension cable to measure current to device while mining?
Just curious if I can use 2.0 USB hub (5V & 4A) to run 10 of these. Looks like 8 is max.
Specs say 500mA (or 560mA) but the real world measurement might be different.
I have a very old ammeter in a box somewhere that I wouldn't trust to be accurate.
As for USB cables, that would require a USB extension cable to slice up - which I don't have any spare of these either at the moment.
However, if I did, I'd expect the results would not be reliable for deciding about the sapphire hardware.
The emerald and sapphire are slightly different power usage as far as I understand.
I think there are people who have a few sapphire already, so hopefully one of them might see your question.
i have some - but i too lack the ammeter.
i think a few of those i shipped out should arrive tomorrow though.
...
Thanks Kano.
You wouldn't happen to have ammeter and spare usb extension cable to measure current to device while mining?
Just curious if I can use 2.0 USB hub (5V & 4A) to run 10 of these. Looks like 8 is max.
Specs say 500mA (or 560mA) but the real world measurement might be different.
Sorry I don't have either.Thanks Kano.
You wouldn't happen to have ammeter and spare usb extension cable to measure current to device while mining?
Just curious if I can use 2.0 USB hub (5V & 4A) to run 10 of these. Looks like 8 is max.
Specs say 500mA (or 560mA) but the real world measurement might be different.
I have a very old ammeter in a box somewhere that I wouldn't trust to be accurate.
As for USB cables, that would require a USB extension cable to slice up - which I don't have any spare of these either at the moment.
However, if I did, I'd expect the results would not be reliable for deciding about the sapphire hardware.
The emerald and sapphire are slightly different power usage as far as I understand.
I think there are people who have a few sapphire already, so hopefully one of them might see your question.
You make it sound like BFGMiner is some sort of original product? Didn't you just fork his code and then now you are bashing the original devs?
BFGMiner is based on cgminer-the-GPU-miner which is based on cpuminer.Present day cgminer is a fork of BFGMiner, created by trolls for trolling.
https://github.com/luke-jr/bfgminer/commit/b9df56511c7bd1a2e1f075e9c184c1a4b0f1ba20
2012-04-26 Fork as BFGMiner
Where he renamed all the words from cgminer to brickminer and changed the donation address by removing ckolivas who wrote most of the code and replacing it with himself.
Question to Kano (or any other member that actually have Erupter(s)),
Can you measure the thickness of the board+sink?
Also, how wide is the board? If you can, can you measure how much current it is pulling from the USB port?
You running it off 2.0 or 3.0 port?
Yeah I posted the dimensions back on the 19th in the original asicminer thread Can you measure the thickness of the board+sink?
Also, how wide is the board? If you can, can you measure how much current it is pulling from the USB port?
You running it off 2.0 or 3.0 port?
https://bitcointalksearch.org/topic/m.2137231
And here on the 23rd:
https://bitcointalksearch.org/topic/m.2241307
Quote
Edit: much later edit with a few updates:
Size: 24.5mm wide
Board alone is 45mm long
Board+USB plug is 59.5mm (of course the plug isn't removable)
Weight: 6g
Height; 6mm (the highest component)
Errors: between 1% and 1.5%
Hash rate: 336MH/s
Size: 24.5mm wide
Board alone is 45mm long
Board+USB plug is 59.5mm (of course the plug isn't removable)
Weight: 6g
Height; 6mm (the highest component)
Errors: between 1% and 1.5%
Hash rate: 336MH/s
But yes that's without a heat sink. emerald
For people like me who leave their mining host computer on all the time anyway it might be more useful to measure at the wall with a Kill A Watt - with the miner mining and the miner unplugged.
I'd suggest the current draw of the USB device is below the Kill-A-Watt meters accuracy level - you'd need to plug in a whole bunch of then (10 or 20) and then average it out - and even then you're measuring at 120v or 230v, so you need to account for power supply efficency, etc, as well.
The multimeter method will give you the exact current draw.
regarding the heatsink: it's flat, less then a 8th of an inch. i'vegot mine (sapphires) plugged in to an anker 10 port hub and there's plenty of space between them. http://www.amazon.com/Anker%C2%AE-Uspeed-10-Port-Adapter-Chipset/dp/B005NGQWL2
For people like me who leave their mining host computer on all the time anyway it might be more useful to measure at the wall with a Kill A Watt - with the miner mining and the miner unplugged.
If you don't leave the host computer on all of the time then you would possibly want to measure the whole setup.
It depends on what you are trying to measure but I suspect one of the two methods in this post is probably what you are looking for.
If you don't leave the host computer on all of the time then you would possibly want to measure the whole setup.
It depends on what you are trying to measure but I suspect one of the two methods in this post is probably what you are looking for.
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