That shouldn't be necessary -- both my RPIs are powered from the hub they control without any issues so far. (Although that might depend on the hub...) I've never heard of anyone having to cut wires for this sort of thing to work.
Hm, interesting! I just feel a bit uneasy about feeding the routers "own" power back into it. Feels like it might work fine until there is a spike in the grid and then: poof your hub/pi is toast, and if you're unlucky your house burns down with it... Do you know what the USB spec. says about this? Edit: Please see this quote from a moderator on the raspberry forum: If you leave the red wire intact, (and are thus "back-feeding" the PI, as its commonly called) you are in fact bypassing the PI's F3 polyfuse.
There is one single case I am aware of where this caused trouble when that user also used a badly designed power supply to feed the hub. The power supply wasn't properly regulated, and unloaded it outputted more than six volt! When he plugged it in it triggered the over-voltage protection diode of the PI (which triggers at about six volt) the resulting short circuit current though the diode, unimpeded by any fuse, overheated the diode so much that it melted a hole in the enclosure of his PI!
Its thus much better to "cut the red wire", and not to back-feed the PI! |
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Ah, crap, I'm so bad at this, updated terms again...
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Already? Ok, I cheated and updated terms for competition, maybe y'all should update your OP so it states clearly you can use your miners with Block Eruptors? Also, I can only send the donation once I actually receive the damn things... so basically deadline is valve time. :/ You all deserve donations really, I just thought it would be a challenge, apparently I was wrong!  and  |
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I would like to compensate the miner that allows me to run 1x Block Eruptor USB and 1x BFL 50GH simultaneously with one process on a Raspberry Pi 512 continuously without memory leaks or other issues with lowest cpu and memory usage in that order without any proxy process against slush and solo mining (not at the same time obviously) with as little configuration as possible.
I'm in for 1 BTC.
If you would like it too, just add to the bounty!
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FYI: If you wan't to recursively both power the RPi with the hub and control the hub with your RPi at the same time just cut the red wire in the uplink cable. -P +-------+
| | |
| c |
| | |
+-------+ |
| hub | | < SOLUTION: Cut the red wire here!
+-------+ |
| | | | |
p o o o |
| |
| +-----+ |
+-| RPi |-+
+-----+
o = other "power hungry" devices
P = PSU power
p = USB power
c = hub controller
For my part o = 1xBE USB and 2x50GH BFL, I hope the RPi will be able to run them! |
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FYI: If you wan't to recursively both power the RPi with the hub and control the hub with your RPi at the same time just cut the red wire in the uplink cable. -P +-------+
| | |
| c |
| | |
+-------+ |
| hub | | < SOLUTION: Cut the red wire here!
+-------+ |
| | | | |
p o o o |
| |
| +-----+ |
+-| RPi |-+
+-----+
o = other "power hungry" devices
P = PSU power
p = USB power
c = hub controller
For my part o = 1xBE USB and 2x50GH BFL, I hope the RPi will be able to run them! |
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I would really appreciate it if friedcat threw in some old heatsinks in our batch just for the industrial look!
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hi
maybe you should, in this documents with payments add column address, and there write yes/no.
br
malin
@yxt > why not filling the spreadsheet to point on which order you have the address ? Difficult to guess for we if we successfully fill the form or send a valid pm +1 |
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Yes ROI is going to be rough, but you have no idea of what the future price of BTC will be.
Also, buying one of these; just for the _fun_ of it and helping the BTC community, is more important than how rich you get!
It's the idea that is important, not the product!
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It's the same company that makes all of these metal hubs (exsys). There are others but they are super expensive (around 300$ per 4 port hub!?)... |
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5V power connector, no idea what connector it is, hard to see on the picture :/ Only 4A, in the pdf. Should work for BE's... But not good for BE because: Not that you asked  but the only possible downside I see is the port arrangement. Yes, I'm going to run 5 zTex and only one BE USB... so if you want to fill this up with BE's it's a poor choice. I'm just happy to have found something with a metal case at ~40 bucks! I actually bought one of these too (just to see how it compares): https://www.elfa.se/elfa3~se_sv/elfa/init.do?item=25-201-87&toc=25065&q=famid84582 At only 20$ it can fit BE's spacewise, and run them if the power supply is the same (4A). Edit: PSU is 2A... limit but should work... BTW, these are neat! But this only makes sense if you get the BE's with the old "industrial" heatsinks! I'm purchased 20 of them.
I would buy the 1x7port and plug 5x4port of these into that... total price of metal hub glory: ~150$ But just imagine 5 of these stacked (laying down of course so you can quietly cool them passively) and filled with 6GH at 50W! Neat! But why didn't you buy the blade? 10GH for 50 BTC! |
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Just bought this:  It was downpriced to like 40$. Same manufacturer but with included "regular" power supply. |
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I'm also looking for a quality "industrial look" USB hub for some time... bought a d-link 7-port for my zTex and stripped the case, it's still working, can't say as much for the 60W power brick that powers the zTex cluster! There are some but they are expensive as hell, and also they have weird power connectors:  |
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I would want to run my one off the RPi internal hub directly, but I guess that's asking for trouble! |
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If you would be so kind to throw in one old heatsink with the shipment to xyt I would be very grateful. I really prefer the industrial design!
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Yes, ROI is probably off on these, but just order one then, you will help bitcoin in the process! It's not about getting rich, it's about changing the world! |
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Yep, too bad we didn't beat them, delays our shipment... |
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Payment for 1 (not 5 sorry) +V5 is in PM.
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No I meant with bitcoind, it runs out of memory after 4-5 hours... no matter what you do.
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