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How many btc can we collect in 1 week using 2 GekkoScience 2Pac BM1384..
I currently mine with 25 2pacs overclocked at 250mhz, which requires cooling and decent power. I also mine on slushpool, using my average as of today /25 then x7. I come up with approx .0001 btc per week as of today for one 2pac using said specs and pool. Of course all of that varies week by week. |
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Still not in the right section, needs to be in Computer Hardware and not just Goods. Mods can take care of it  Seems like a bit too much for a stock clocked compac, was expecting a higher hashrate but I guess this works. You also don't really need a fan at stock especially if you're only running off of a Pi USB port, I guess that's just for aesthetics, right? actually Raspberry Pi3 can supply full voltage from the power supply in this case 2.4 amps so there is no reason you can't overclock it to 300mhz... I'm just not going to encourage people to cook their shine new asic  Really? I wasn't aware you could send that much voltage through one USB port. Even 3.0 can only supply a maximum of one amp the last time I checked, and doing so on my desktop resulted in numerous hardware errors with fans running on my 2pac. Ya I really didn't test the overclocking, I was more focused on the software. I just tried to overclock one and the best i could get was 118.75mhz for about 13.5 gh/s So not really worth trying to overclock, I'm going to remove the overclocking section from the manual and website. But the fan does keep it cooler, and cooler is better even at stock speeds in the long run so I wouldn't call it aesthetics only. |
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Still not in the right section, needs to be in Computer Hardware and not just Goods. Mods can take care of it Seems like a bit too much for a stock clocked compac, was expecting a higher hashrate but I guess this works. You also don't really need a fan at stock especially if you're only running off of a Pi USB port, I guess that's just for aesthetics, right? actually Raspberry Pi3 can supply full voltage from the power supply in this case 2.4 amps so there is no reason you can't overclock it to 300mhz... I'm just not going to encourage people to cook their shine new asic *edit - I've also included directions on overclocking in the manual. I just ship at stock speeds |
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This should really be in the Goods->Hardware secrion of the forum and not the hardware support section  Sorry. I tried to delete/move it but I can't. Can i get a mod to move it please. /sorry |
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Just fyi Plug and play 2Pac miners .... I have 5 for sale at https://mywebstash.net everything needed to mine including a manual https://mywebstash.net/manualI'll order more from sidehack if these sell. It's not a great deal but I figure it's good to get people started without spending 1000's of dollars. And it will be a better deal as sidehacks miners improve |
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Finally got my overclocking issues figured out! My creation is about to go from the "lab" (garage) to the "data center" (basement) I just needed a cluster of pi (pies?) to go with my cluster of 2pacs. Found out what I thought was a hardware error with the 2pac was actually the pi usb port getting overloaded. I ran stable doing 200mhz @1.41v over the weekend and have been upping it every day. Doing 250mhz @ 1.41v for an average of 550Gh/s    |
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yep it goes thinner as it gets to the female end. the usb cables i use are 28awg data and 24 awg power.
basic wire thickness from the power supply is ... meanwell -> 16awg -> 18awg -> 24awg
Where do you do the split from 16awg to 18awg? I didn't see a distribution block in your pictures, is there one just off screen somewhere? I don't have good pictures yet. I'm still building it lol. Basically I "upgrade" the usb cable and then solder all 5 18ga wires from a "group" of miners to a single 16ga wire that i then run to the power supply. No distributions blocks just lots of solder and tape if you look at it from the top you can see the clump of wire at the bend were 2 groups of miners come together that bundle of tape is where i soldered the wires.  |
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Thanks! So now I just "upgrade" usb cables by cutting the power from the hub side, solder in 18awg wire powered from the meanwell.
and stick em in a plastic holder
So for the last few inches/cm before terminating in the female plug you are running the thinner wire? What's the max amperage you have pushed through the connectors? yep it goes thinner as it gets to the female end. the usb cables i use are 28awg data and 24 awg power. basic wire thickness from the power supply is ... meanwell -> 16awg -> 18awg -> 24awg I have put 1.51v @ 300mhz which is about 2.8ish amps. But I am having stability issues so I don't know what i am going to run it at. |
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Going along with hurricandave's suggestion of custom usb cables. I'm working on version 2 now, going straight to the jack this time. I hope I can cut down the power usage a little.  So you're running the beefy (24ga?) wires from power supply to the two outer posts on the USB connector and then the two inner data wires to the USB hub? Do the male plugs that go to the USB hub only have data +/- connected, do are you doing something with the 5v from that bus, too? Would you mind providing a closer image of where the female ports connect to the wood supports? I like this idea and may "borrow" it if that's okay with you... Those are 18ga power wires on the outside and 28ga data inside. I don't make them anymore. I make "upgraded" usb cables now. They were too difficult to make and assemble and I didn't trust them. I tested 10x patched cables against 10x homemade ends they didn't make much difference. So now I just "upgrade" usb cables by cutting the power from the hub side, solder in 18awg wire powered from the meanwell. and stick em in a plastic holder  I made a post in the "I did it" thread with more info. The only real difference is I now cut the both power wires coming from the hub. |
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I have one 2pac (out of 20) that when i plug in hashes fine for a while but then goes zombie. the /var/log/messages and /var/log/syslog just keep showing cp210x converter detected , cp210x converter attached , cp210x converter disconnected. over and over until it crashes my raspberry pi (aprox every 6-10 hours) I have tried different ports and voltages but nothing. The fact that I have 19 others hashing away fine leads me to believe it's the stick but I want ask officially before i bug sidehack (again)  details are you are freq 150 200 250 300? did you run it alone and it fails? my guess is if you have 19 good and 1 bad it really is bad. try running it alone for a while at freq 200 sorry I was running at 300mhz at first at 1.51v , then i brought it down to 275mhz at 1.46 , and today I kept it 250mhz at 1.45, 1.42 and 1.41 *edit* I will try it solo next time it crashes |
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I have one 2pac (out of 20) that when i plug in hashes fine for a while but then goes zombie. the /var/log/messages and /var/log/syslog just keep showing cp210x converter detected , cp210x converter attached , cp210x converter disconnected. over and over until it crashes my raspberry pi (aprox every 6-10 hours) I have tried different ports and voltages but nothing. The fact that I have 19 others hashing away fine leads me to believe it's the stick but I want ask officially before i bug sidehack (again) |
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Ya I found these guys take 2x the power to run them, unless you have an extra beefy hub. I would suggest to set one stick 1.26v@100mhz (half the ports capacity) run it an hour. If it works run through all your sticks to verify the all work… that leaves the hub.
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I saw that error and more all weekend... needs more power. I found that even running on the lowest mhz and voltage settings my miner would still die if I plugged more sticks in than can be powered. Getting work on fresh blocks would give me this error even on the lowest settings, because they were all firing up at the same time. These guys are thirsty.
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Going along with hurricandave's suggestion of custom usb cables. I'm working on version 2 now, going straight to the jack this time. I hope I can cut down the power usage a little. |
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Kinda sounded like the wiper was bent a little and no longer making contact with the resistive surface, so it defaulted to full resistance and therefore highest voltage. Probably the extra pressure of a heavier tool helped warp it back into place.
hmm, the way you put it, it sounds like i almost know what i'm doing  |
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There's still the issue of the stick that won't adjust voltage. Sounds like the potentiometer is damaged.
Ya just needed a bigger hammer err screwdriver. All 9 worked with my precision screwdriver but that one ... needed the biggest one i had in my toolbox. lol All good though thanks! |
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I'm running about 200 watts on 10 sticks for 300gh. So I don't think that's overkill, could still use more lol. If you look at the left of my miner you'll see the kill-a-watt. It hovers between 180 - 205 watts. But that also includes fans, hubs and pi's  |
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