Mikestang
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Activity: 1274
Merit: 1000
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September 17, 2015, 06:04:16 PM |
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If things are still a bit confusing, I would highly recommend sticking to some of the suggested hubs that people have already tested and are known to work well  Thanks for the explanation, most of it got through my thick skull. You started to lose me with the components, but I think I get it. So upon further inquiries it appears that my hub is not going to be good for overclocking stick miners ( post). I'm going to pick up one of those usb testers and play around with this hub (afterall, playing around is most of the fun), but if I'm going to be running multiple sticks overclocked I'm going to have to look for new hardware. |
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Jake36
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September 19, 2015, 10:31:28 PM |
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I'm with Mikestang, kind of got the jest of it, that for a 12V it boils down to the 12V---->5V as how good it is.
So I guess it's better to do a hub that takes 5V straight, like the one AJRGale did and take the conversion from 12V to 5V out?
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TheRealSteve
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September 20, 2015, 01:01:43 AM |
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That eliminates some components - specifically whatever technology used to step the voltage down from 12V to 5V. On the other hand, it introduces the need for a 5V power supply which are not as commonly available (computer PSUs and PSUs meant for building into devices - like a good chunk of MeanWell's range - aside). There's also no guarantee there aren't other components in there that would still limit the per-port or overall device current capability. Example: say the hub can use either the power supplied over the USB cable, or the power supplied via external power, and uses a bit of logic and some solid state component that acts as a 'switch' between the two. That 'switch' may well impose a limit. Again, check specs or stick to hubs people have already successfully used |
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SamHa1n
Member
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Activity: 60
Merit: 10
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September 20, 2015, 03:18:46 PM |
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I had good luck modding cheapest hubs I could find at the time. Shelf board with all the hubs attached is available if someone is interested, make an offer, its heavy.  |
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Jake36
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September 20, 2015, 08:02:29 PM |
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This is the one I ordered yesterday, figured it should run one modified 10 port hub with 5 sticks (with a frankenstein setup) and just a plain hub for the Pi and 2 maybe 3 fans (and should leave headroom on the power). A rough drawing of the frankenstein cross of Y cables, your bridge in the review, TheRealSteve's stick test setup (take a little from each and combine). This way the sticks are in place for an easier cooling setup. https://i.imgur.com/51KOYXi.png frankenstein |
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AJRGale (OP)
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September 21, 2015, 05:19:12 AM |
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This is the one I ordered yesterday, figured it should run one modified 10 port hub with 5 sticks (with a frankenstein setup) and just a plain hub for the Pi and 2 maybe 3 fans (and should leave headroom on the power). A rough drawing of the frankenstein cross of Y cables, your bridge in the review, TheRealSteve's stick test setup (take a little from each and combine). This way the sticks are in place for an easier cooling setup. https://i.imgur.com/51KOYXi.png frankenstein I bought a bag full of these USB male plug to Female jack to do this hack too, i will photogragh my adventure with this if you wish. (please, don't hesitate to show us your hacks!) |
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philipma1957
Legendary
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Activity: 4116
Merit: 7872
'The right to privacy matters'
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September 21, 2015, 10:25:46 AM |
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This is the one I ordered yesterday, figured it should run one modified 10 port hub with 5 sticks (with a frankenstein setup) and just a plain hub for the Pi and 2 maybe 3 fans (and should leave headroom on the power). A rough drawing of the frankenstein cross of Y cables, your bridge in the review, TheRealSteve's stick test setup (take a little from each and combine). This way the sticks are in place for an easier cooling setup. https://i.imgur.com/51KOYXi.png frankenstein I bought a bag full of these USB male plug to Female jack to do this hack too, i will photogragh my adventure with this if you wish. (please, don't hesitate to show us your hacks!) when my new psu's come for these 2 hubs I will post http://www.eyeboot.com/19-port-dipo-electronic-USB-Hubthey will up grade from this psu http://www.trcelectronics.com/View/Mean-Well/NES-100-5.shtmlto this one https://www.trcelectronics.com/ecomm/pdf/lrs150f.pdfshould be an exact fit. I go from 80% to 85% and 100 watts to 110 I also discovered the turning the pot from 5.0 volts to 5.2 volts make these psu's work better. They get more Efficient by just a little. And when the voltage drops just a bit from the sticks you end up at 5 or 5.02 volts |
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Jake36
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September 21, 2015, 01:01:17 PM |
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This is the one I ordered yesterday, figured it should run one modified 10 port hub with 5 sticks (with a frankenstein setup) and just a plain hub for the Pi and 2 maybe 3 fans (and should leave headroom on the power). A rough drawing of the frankenstein cross of Y cables, your bridge in the review, TheRealSteve's stick test setup (take a little from each and combine). This way the sticks are in place for an easier cooling setup. https://i.imgur.com/51KOYXi.png frankenstein I bought a bag full of these USB male plug to Female jack to do this hack too, i will photogragh my adventure with this if you wish. (please, don't hesitate to show us your hacks!) Never thought about using those adapters, looks like they should work (as long as the covering comes off easy and you got room to attach wires). I think I'll hold off on doing mine and see how these turn out, it probably will be easier to do and save some time. |
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AJRGale (OP)
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September 26, 2015, 01:26:12 AM |
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 just to let you know, these are nasty to modify, has to get the heat-gun and iron to get the plastic potting off. |
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Jake36
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September 26, 2015, 05:20:25 AM |
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just to let you know, these are nasty to modify, has to get the heat-gun and iron to get the plastic potting off. Thanks. That looks like a mess I'll pass on, I'll make up one that I was thinking of and test it out (when all the parts arrive). |
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AJRGale (OP)
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September 29, 2015, 01:58:02 AM |
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Hmm.. I might just grab a few to play with it doesn’t look to hard, even to splice in a secondary plug on a cable just for power. |
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notlist3d
Legendary
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Activity: 1456
Merit: 1000
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September 29, 2015, 02:11:46 AM |
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Hmm.. I might just grab a few to play with it doesn’t look to hard, even to splice in a secondary plug on a cable just for power. Are you trying to just get power from 2 usb's for this or are you hooking the little dongle or to something else for more power? You can get Y splitters very cheap on ebay. I think it was Phil that pointed these out in another thread - http://www.ebay.com/itm/221661361513?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT They are 1.45 each. Only thing is it took a LONG time to get. So do not order them if you need them quick. But order and have 2 weeks or so they are quite a bargain. The 5 I got all seem to work good aswell. So work as advertised. |
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Jake36
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September 29, 2015, 05:52:59 AM
Last edit: October 01, 2015, 11:34:20 AM by Jake36 |
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Hmm.. I might just grab a few to play with it doesn’t look to hard, even to splice in a secondary plug on a cable just for power. Are you trying to just get power from 2 usb's for this or are you hooking the little dongle or to something else for more power? You can get Y splitters very cheap on ebay. I think it was Phil that pointed these out in another thread - http://www.ebay.com/itm/221661361513?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT They are 1.45 each. Only thing is it took a LONG time to get. So do not order them if you need them quick. But order and have 2 weeks or so they are quite a bargain. The 5 I got all seem to work good aswell. So work as advertised. Yes, modify them for power from 2 ports. I got the y-cables coming on the slow row boat from China, but if modifying these work like I think they will, then the whole setup should fit nicely inside an old PC case and won't have to figure out a way to hold the compac's in place for a fan while keeping the y-cables out of the way. If these cheap usb meters work, the cable running to the second port would only need to be about 3-4" long, which keeping wires short should be a plus and another plus is I can use a little heavier gauge wire instead of the smaller usb wire. |
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AJRGale (OP)
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September 29, 2015, 07:26:20 AM |
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Hmm.. I might just grab a few to play with it doesn’t look to hard, even to splice in a secondary plug on a cable just for power. Are you trying to just get power from 2 usb's for this or are you hooking the little dongle or to something else for more power? You can get Y splitters very cheap on ebay. I think it was Phil that pointed these out in another thread - http://www.ebay.com/itm/221661361513?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT They are 1.45 each. Only thing is it took a LONG time to get. So do not order them if you need them quick. But order and have 2 weeks or so they are quite a bargain. The 5 I got all seem to work good aswell. So work as advertised. But but but! that's not how you DIY! yeah, OK, if you want a simple plug'n'play, go for it, but ima feed 20A to 'tem stiiks! |
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notlist3d
Legendary
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Activity: 1456
Merit: 1000
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September 29, 2015, 12:45:12 PM |
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Hmm.. I might just grab a few to play with it doesn’t look to hard, even to splice in a secondary plug on a cable just for power. Are you trying to just get power from 2 usb's for this or are you hooking the little dongle or to something else for more power? You can get Y splitters very cheap on ebay. I think it was Phil that pointed these out in another thread - http://www.ebay.com/itm/221661361513?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT They are 1.45 each. Only thing is it took a LONG time to get. So do not order them if you need them quick. But order and have 2 weeks or so they are quite a bargain. The 5 I got all seem to work good aswell. So work as advertised. But but but! that's not how you DIY! yeah, OK, if you want a simple plug'n'play, go for it, but ima feed 20A to 'tem stiiks! I know was just pointing out a easy option. And it's cheaper then a lot of DIY ones as they ship so slowly. And you still can DIY. If you wanted to power it from something beside other USB you could cut off the power plug in and could hook it up to external source. |
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spazzdla
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Activity: 1722
Merit: 1000
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March 28, 2017, 08:26:10 PM |
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wormbog
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April 03, 2017, 06:21:49 PM |
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Very impressive! I'll be interested to hear if those hubs can handle that much power once you've cranked the frequency on the 2pacs up to 250 and beyond. |
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