If you're looking for chips, lentbt2 has them on Ebay: http://www.ebay.com/itm/191006340017Note I have ordered from him before, they are good chips, come very quickly, and have all worked. He is a reputable vendor. So order away, they tend to go fast. C |
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the boards are superior to those of jallies imo
I know. I'm just a chip popping jally junkie at heart. :-) So who sold the really cool water cooling solution? I'd like to try one of those. C |
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Winning Bids
sacskate 3 @ 0.75
TechByPC 1 @ 0.75
Reckman 16 @ 0.75
twib2 1 @ 0.75
SoSDk 1 @ 0.75
dentldir 1 @ 0.75
uberFoo 3 @ 0.75
joeventura 2 @ 0.75
lightfoot 1 @ 0.7
ipxtreme 4 @ 0.7
Vampaerus 1 @ 0.7
handytxg 3 @ 0.7
iluvPCs 13 @ 0.7
Outbid
iluvPCs 2 @ 0.7
UnderGod 1 @ 0.7
ngindenkore 5 @ 0.7
ampu 1 @ 0.7
ASICSAUCE 1 @ 0.7
pmq 2 @ 0.65
miaviator 10 @ 0.65
Omen1855 4 @ 0.65
Undergod 1 @ 0.6
Swimmer63 2 @ 0.6
miavator 50 @ 0.55
jcoin 2 @ 0.55
MrZambonie 1 @ 0.55
Jaketri 3 @ 0.5
Mudbankkeith 1 @ 0.5
RicRock 3 @ 0.5
joeventura 20 @ 0.5
Thanks for coming out, I'll PM you all shortly.
I won one? Cool, I was thinking "should I bid .75"? :-) Now what do I do with the thing? Take the chips off and put them on Jallies! :-) C |
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Just add more BFL chips. Simple.
Just *find* more BFL chips. I think BFL took them in so they could make those stupid 250gh miners. C |
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Yes I floated the chip off like putting the ASIC on. Pre the area with some flux and heat again to flow smooth. Put new chip on, flow it onto the board. while its still hot put a little more flux and solder the leads on good. Clean up as necessary. (A short wouldn't make ya happy right?)
I think this was the hardest chip to put on yet. My forth jallie when given enough power by a 1500 Watt PSU lit the power LED for a sec and is now dead again. Hmm back to square one with out a hole in the chip this time. I want to know if anyone successfully reballed a chip yet. I don't have a problem with stealing the chips then.
Haven't reballed, but I have taken the solder off two chips, and will try mounting them to the next jally. I think you can do it without reballing, my problem is cz main jally is not going to take more chips. I think in your case one of the chips is shorted on the 1v supply. Fix it and mine like hell :-) C |
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Update: Took the old 232 chip off the board. You cannot do this with a soldering iron, the back of the chip is soldered to the board via a ground plane. Think air tools and temps of 450c+ for over a minute. That's a massive amount of heat.
C
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Works most of the time? It WORKS all of time, but 99% of humans can't follow this advice b/c the reptilian part of the human brain is wired to buy or hold at the top out of excitement and greed and sell at the bottom out of fear. It is extremely difficult to sell at the top when profits are huge b/c the brain greedily expects/wants more and conversely its hard to not sell when something is plunging and losses are piling up b/c the brain fears losing all and just wants to get out at any cost.
Yes, but if everyone followed this strategy it would not work. Same reason you can't wish you had bought bitcoin instead of a miner: If you had and everyone had then the price of bitcoin would have skyrocketed while you were buying and miners would fall. Weird that people don't understand this. |
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Update: Reflowing the FT232 chip did not help. To verify I heated each quarter with a soldering iron, then verified no shorts and good connections. Same thing, did not work. This is not a reflow problem.
Back to drawing board. Will swap out 232 chip this week.
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People really like these miners. What can you say?
C
:-)
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Well I got the broken jally in the mail today and it is *exceptionally* interesting to see what's going on here.
The power supply was blown of course, no output, output caps exploded. However what is interesting is that although the case was factory sealed, after opening it I can see that the power wires to the jally were either soldered by a junkie, or were done by someone who hit the output caps as well. Lots of solder, crappy job, pics to follow. No wonder it blew.
More interesting: Plug it into a big power supply, it fires up, lights the two chips, fails to talk. No biggie, waiting on my ftdi chips from mouser. Ground plane is intact, not that. However VERY INTERESTING THING I HAVE SEEN BECAUSE I HAVE COOL POWER SUPPLIES:
My power supplies are regulated output, 2amps max up to 52 volts. I set it for 13v, 50ma to start with. Hooked up, voltage drops to 3 volts, power LED barely comes on. Crank the current, at 1.5a it starts to come alive, the jally starts testing, and the voltage drops sharply from 12.9 volts down to 5. Then the jally fast flashes the front led.
This is something people see. In this case, the power supply can't provide enough surge power. So I ran the current up to 2.2 amps which is max. Tried it out.
Voltage drops to 8 volts unit flashes. So what's happening here is interesting: The jally starts up, pulls enough power to start, the pulls the power supply *hard* to bring the chips online. If there isn't enough current it will fast flash fail.
Which means if you get that error on a Jalapeno, Single, or Little Single, then the problem is the power supply is too weak. Don't return the whole thing, get a man's power supply and go.
Very interesting confirmation here. Edit: This is confirmed by hooking same jally up to my 500 watt corsair which drops from 12.4 volts to 12.2. So what I have written is a flat fact.
C
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Well I got the broken jally in the mail today and it is *exceptionally* interesting to see what's going on here.
The power supply was blown of course, no output, output caps exploded. However what is interesting is that although the case was factory sealed, after opening it I can see that the power wires to the jally were either soldered by a junkie, or were done by someone who hit the output caps as well. Lots of solder, crappy job, pics to follow. No wonder it blew.
More interesting: Plug it into a big power supply, it fires up, lights the two chips, fails to talk. No biggie, waiting on my ftdi chips from mouser. Ground plane is intact, not that. However VERY INTERESTING THING I HAVE SEEN BECAUSE I HAVE COOL POWER SUPPLIES:
My power supplies are regulated output, 2amps max up to 52 volts. I set it for 13v, 50ma to start with. Hooked up, voltage drops to 3 volts, power LED barely comes on. Crank the current, at 1.5a it starts to come alive, the jally starts testing, and the voltage drops sharply from 12.9 volts down to 5. Then the jally fast flashes the front led.
This is something people see. In this case, the power supply can't provide enough surge power. So I ran the current up to 2.2 amps which is max. Tried it out.
Voltage drops to 8 volts unit flashes. So what's happening here is interesting: The jally starts up, pulls enough power to start, the pulls the power supply *hard* to bring the chips online. If there isn't enough current it will fast flash fail.
Which means if you get that error on a Jalapeno, Single, or Little Single, then the problem is the power supply is too weak. Don't return the whole thing, get a man's power supply and go.
Very interesting confirmation here. Edit: This is confirmed by hooking same jally up to my 500 watt corsair which drops from 12.4 volts to 12.2. So what I have written is a flat fact.
C
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Ok, if anyone is still reading I'm back up to 3 jalapenos. The one that was failing to be recognized via USB now hashes 15.5Ghs again. So I can say I solved the unrecognized device issue with jalapenos. Apparently the FTDI chip just decides not to live anymore. After removing the old one and prepping the area. Just flow the chip down, then the hard part comes. You have to solder all the leads down unless I'm missing something. After soldering all the leads I carefully inspected it and cleaned up the prevent any shorts of course. Truthfully I just dragged the Iron with some resin core solder over the leads and cleaned. If they look like a speck of copper you need to hit it again. So I thought I heard something before about a bounty on this. If you would like I can provide part #'s and pics. What exactly caused this failure I don't know but it's all in the chip.
You rock. You should post this from the highest hills, lowest dales, and all that crap. Replacing the FTDI chip un-bricks dead jallies. Very nicely done. Despiration is the mother of invention. And how much heat did you need to use to remove it? 400+C? (yes, I am thinking about cheating and using chip-quik) C |
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1 @ .6
Want to see how the professionals build their toys :-)
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What this is going to do is really whipsaw those people who paid good money for miners delivered "someday". If you bought in bitcoin then it doesn't matter what the USD price does, it's all bitcoin/bitcoin.
But I expect another wave of people trying to get refunds, the fun part will be if they paid in bitcoin and want their refunds in USD. :-)
C
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Some people have all the luck. I have to wait forever for this dopey broken jally, you have one to play with now. *Sigh*....
First, I'd say as to the flashing one, what are the voltages? When the light is flashing on and off what do we think is happening? Maybe the 12 volt rail is going low due to a short? Maybe the 1 volt supply is dead. Question, perhaps one of your chips has a short to ground, preventing things from starting?
There are pads where you can see the 12 volts, 3.3 volts, and um 1 volt lines. Check to see if any have appropriate power. Check to see if there is a short (0 ohm) between ground and 1v. Try reflowing the chips maybe.
If all else fails, float off the chips and put them on another jally.
C
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Ok, so in a few months the Jalapenos will be history as new chips come online.
So... What kind of new models of chips can we retrofit into our jallies to keep them hashing? I have this thought of a 100gh/s jalapeno.
Thoughts?
C
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That's good info!! I was wondering how many watts/amps I'd be drawing per chip as I plan on running more than just the two I have off of a 1000w ATX power supply.
From my P3 meter I tend to see about 15 watts per chip and 20 for the hotel load (CPU, fan, everything else). Technically the jally will pull about 40 clocked at 5gh, 50 when you take it to 8. I think the original spec for the chip was to pull 10 watts at full power, and the push to 15 made a pretty big difference (the 1 volt power supply is only rated to 70-80a, which makes sense if each chip pulls 10a. If you bump to 15, 5 chips is 75 and six is 90.) As a side note, both my 6 chips have been running nearly 20 hours @ 23.5Gh/s with 1.5-1.7% HW errors (better than my chilis error wise) Still considering going to chip 7 and 8... but I'd like to have better heatsinking and power supply in place. The fuse is a most excellent idea and I intend to use it.
Indeed. One thing I did notice on the board is that there is a connector on the edge for measuring the 1 volt supply voltage. I did think about building a 20-40a 1 volt supply on another board to back-feed the jalapeno for 8 chips and to take some strain off the FETs, but then I realized I was getting two more (any day now!) and it might be better to run several at 5 chips than go for 1 at 8. But if you do have a 1 volt supply, that would be a good way to go. An extra 40a would be enough to run anything. :-) C |
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Please, please, please make sure you actively cool the 1850 & the MOSFETs if you decide to do this. The thermal plane on the board is really effecient and you will overheat both if you are running that many chips unless you have active cooling on both the top and bottom of the board for both the chips, MOSFETs and especially the 1850, which will cause intermittent and strange lock ups if it overheats.
And the other yup: The MOSFETs *MUST HAVE GOOD HEAT SINKS* once you go above 4 chips. This is going to be what kills these boards BTW; and is a good reason to wire a fuse in series with your massive power supply (since otherwise you will have the smoking/flaming FETs). Speaking of which, plug time: If you're really doing this put a simple 3ag fuse in series with your new power supply. Calculate it by the number of watts your unit draws (20 watts+15 per chip) and divide by 12. So a 5 chip unit is 20+75=95 watts/12=8 amp fuse. That way you won't feed more current than that into a short. C |
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