@chanberg - I like those heatsinks. If I had some of those I would have used them. I just used what I had on hand though and used a dremel to cut them to size, and a grinder to remove any uneven-ness. Here's a couple pics.  I have no idea where the heatsink on the left came from, but the long thin heatsink actually came from an old motherboard from it's mosfet cooling. The other two were from old Pentium based northbridge systems (as you can see they've been cut down - they used to be a lot larger and square). Here's a shot of one like the motherboard mosfet heatsink on the gridseed:  |
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That's what I replaced mine with yes. It's close to the original specs, but not exactly. I tried a couple different ones from TI and they didn't work. The 2Q5A ended up working so I left it with that. What happened for yours to look like that? I tried dual mining with a 47k voltmod...won't do that again. Just regular scrypt mining on a 47k resistor mod. Think I'm gonna get some small heatsinks and attach it on all my seeds. The picture above is what I found on google matching my problem but this is what happened to mine Wow...no pinched fan cables or anything? How long has that one been mining up until that happened? What type of power supply were you using? What's the ambient temp where it's mining? Sorry for the questions, but I've got 6 that have the 49.9k/50k mod. 3 have been running non-stop 24x7 for 2 months, the other 3 have been running non-stop for about 3 weeks now. When I've modded them, I did add some small heatsinks to the mosfets because a little extra cooling never hurts when overclocking anything. What heatsinks fit the mosfets? Can you share that please? It might be useful for lot of folks who have modded their gridseeds. I have knocked off the thermal pads (bottom and top). Bottom I have used thermal paste and direct contact to the heatsink (insulated the troublesome areas), since anyways the ground-pour in the bottom is connected to the heatsink (via the brass nuts). On the top, I have added copper shims and thermal paste and direct heatsink. The copper shims were 15x15mm which I split into 4 (7.2x7.2) using my trusty Dremel. The heatsink on the top (non fan side) get slightly warm @1200 for the GS. I think the copper shim works good in the way I have done, since the shims on top ensure a proper contact in the bottom... I am using a 47k axial resistor mod. EDIT: And before anyone tells me about the hazards of the silver thermal paste... this is CoolerMaster ThermalFusion 400 (Electrially Non-conductive, high thermal efficiency paste...) :-) Well...I'm not sure of the exact dimensions of the heatsink....I'm sort of a collector of such things since you never know when or what you might need one for. I've saved them all from past motherboards. The one I used was an old northbridge heatsink. I can take some pics and measurements today and post those. The fins are MAYBE 2-3mm high. Taller can be used...maybe 4-5mm....so whatever you use in that location will need airflow to really be effective. |
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Wow...no pinched fan cables or anything? How long has that one been mining up until that happened? What type of power supply were you using? What's the ambient temp where it's mining?
Sorry for the questions, but I've got 6 that have the 49.9k/50k mod. 3 have been running non-stop 24x7 for 2 months, the other 3 have been running non-stop for about 3 weeks now. When I've modded them, I did add some small heatsinks to the mosfets because a little extra cooling never hurts when overclocking anything.
I suppose repeated high current spikes and overheat may help damage the mosfet, I think those little LFPAK rated for 76AMP might be possible but to allow continues drain @76AMP the pad need to be able to handle the heat dissipation of SMD mosfets. Which explain why they are overheated and blow. For same reason anything to cool this baby down will help bigtime!! If that's the case then the heatsinks that will fit in that small location won't do much good at all unless they have airflow. Time to look into some better cooling options than the small hs I put on them. |
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That's what I replaced mine with yes. It's close to the original specs, but not exactly. I tried a couple different ones from TI and they didn't work. The 2Q5A ended up working so I left it with that. What happened for yours to look like that? I tried dual mining with a 47k voltmod...won't do that again. Just regular scrypt mining on a 47k resistor mod. Think I'm gonna get some small heatsinks and attach it on all my seeds. The picture above is what I found on google matching my problem but this is what happened to mine Wow...no pinched fan cables or anything? How long has that one been mining up until that happened? What type of power supply were you using? What's the ambient temp where it's mining? Sorry for the questions, but I've got 6 that have the 49.9k/50k mod. 3 have been running non-stop 24x7 for 2 months, the other 3 have been running non-stop for about 3 weeks now. When I've modded them, I did add some small heatsinks to the mosfets because a little extra cooling never hurts when overclocking anything. |
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That's what I replaced mine with yes. It's close to the original specs, but not exactly. I tried a couple different ones from TI and they didn't work. The 2Q5A ended up working so I left it with that. What happened for yours to look like that? I tried dual mining with a 47k voltmod...won't do that again. |
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Some of the specs on that part look excessive. You'll want to match the specs as closely to this as possible: https://www.dropbox.com/s/w4m5vu4k5jgopk8/qm3022m6_ubiq.pdfIt's basically a 30v N-Channel mosfet with a 7mOhm RDSon and a 76A ID@25c (Continuous current drain at 25c). You'll want to match the gate charge as close as possible as well. I burnt out that same mosfet (3022m) and replaced it with the following: http://www.ti.com/product/CSD17552Q5A. I blew my mosfet when curiosity got the best of me and I tried to dual mine with the voltmod at 1100Mhz. Moral of the story...don't do that. Don't even think of doing it. I replaced my mosfet with the one from TI and it's back up and running but it's a little crippled. Chip 3 seems to generate some errors no matter what speed, but it still hashes and I still get around 439khs from that gridseed. I use 39AMP ID@25C mosfet just because i couldn't find more then 39AMP. there is few pin exposed on the bottom of the board. which was isolated by thermal pad. when i swap the pad with grease, those exposed shorted with the ground. and my 12 volt was off. nothing blew. so i think this mosfet start draining the current before any other part(like FB23/24) damage. which making me think that its better to use lower amp? i am not expert on this, what you think? Well, I don't think the seeds "require" 76A - especially in scrypt only mode, but when replacing a part you should always try to match the original specs as close as possible when we don't know the original design engineering considerations. As for the short - I think you're lucky  Shorts often don't leave components untouched - so I'd be on the lookout on that particular gridseed for any premature failure down the road. |
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First looks like: LISTING: 1 element(s)
< COMPONENT INSTANCE >
Reference Designator: U29
Package Symbol: SOT23-6
Component Class: IC
Device Type: PCF8574_P_0_SOT23-6_74HC2GU04
Value: 74HC2GU04
Placement Status: PLACED
origin-xy: (1467.57 867.87)
rotation: 0.000 degrees
not_mirrored
Function(s):
Designator: F8
Type: PCF8574_P_0_SOT23-6_74HC2GU04
Pin(s): 1, 6, 3, 4, 2...
Properties attached to component definition
VALUE = 74HC2GU04
Pin IO Information:
Pin Type SigNoise Model Net
--- ---- -------------- ---
1 UNSPEC CLK
2 UNSPEC DGND
3 UNSPEC CLK
4 UNSPEC N31664886
5 UNSPEC OVDD33
6 UNSPEC N31664859
Second looks like: LISTING: 1 element(s)
< COMPONENT INSTANCE >
Reference Designator: U9
Package Symbol: SOT23_5
Component Class: IC
Device Type: SN74AHCT1G125_0_SOT23_5_UP0111
Value: UP0111
Placement Status: PLACED
origin-xy: (296.48 1497.43)
rotation: 90.000 degrees
not_mirrored
Function(s):
Designator: F4
Type: SN74AHCT1G125_0_SOT23_5_UP0111
Pin(s): 3, 4, 1, 5, 2
Properties attached to component instance
ROOM = OCD_CRT
Properties attached to component definition
VALUE = UP0111
Pin IO Information:
Pin Type SigNoise Model Net
--- ---- -------------- ---
1 UNSPEC OVDD33
2 UNSPEC DGND
3 UNSPEC OVDD33
4 UNSPEC N31931394
5 UNSPEC DVDD_PLL
Hopefully you or one of the experts here know what they are because I don't. I have had 0 luck finding these. Can an expert here help me to find these or find something that will work to replace these? I can't believe I'm the only person here who had a problem with them getting hot and breaking.... These are 2 seperate pods and both chips look the same like the got hot and cracked  U29 is a "dual unbuffered inverter" http://www.nxp.com/products/logic/buffers_inverters_drivers/series/74HC2GU04.html - see the ordering tab on that same page I posted that back on May 14, have you tried that link and through the Order tab? If so you should have seen that Mouser carries that part (direct link: http://www.mouser.com/ProductDetail/NXP-Semiconductors/74HC2GU04GW125/?qs=sGAEpiMZZMutVWjHE%2fYQwzJv2zzn7Nf7MNFQIOCd6fU%3d) That at least gets you one part. I'll try to see if I can locate the other (not likely since UPI is almost exclusively overseas) or see if I can find a close match as a replacement. :EDIT: I did some quick searching and it looks like ON Semiconductor has a very close match to the original part. It has a higher accuracy rating but a lower output current (by 100mA....may or may not be a concern). http://www.digikey.com/product-detail/en/CAT6219ADJTD-GT3/CAT6219ADJTD-GT3-ND/2271436Another possible match (Same specs except a slightly higher minimum input voltage) http://www.silergy.com/productsview/sy6306b Those are the closest matches I could find. Maybe someone else can try if they haven't already. If I have time tomorrow I can check some more. |
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Some of the specs on that part look excessive. You'll want to match the specs as closely to this as possible: https://www.dropbox.com/s/w4m5vu4k5jgopk8/qm3022m6_ubiq.pdfIt's basically a 30v N-Channel mosfet with a 7mOhm RDSon and a 76A ID@25c (Continuous current drain at 25c). You'll want to match the gate charge as close as possible as well. I burnt out that same mosfet (3022m) and replaced it with the following: http://www.ti.com/product/CSD17552Q5A. I blew my mosfet when curiosity got the best of me and I tried to dual mine with the voltmod at 1100Mhz. Moral of the story...don't do that. Don't even think of doing it. I replaced my mosfet with the one from TI and it's back up and running but it's a little crippled. Chip 3 seems to generate some errors no matter what speed, but it still hashes and I still get around 439khs from that gridseed. |
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Yes, you really need a multimeter in order to test continuity. If you're doing anything with electronics, you should have a multimeter that does at least basic testing including continuity. It's an investment in a tool you'll find very handy quite often.
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I got it by using the cmd line --log=C:\Users\Admin\Desktop\minerd-gc3355\log.log
so my .bat looks like minerd-gc3355.exe -c config.json --log=C:\Users\Admin\Desktop\minerd-gc3355\log.log
pause
Ty, to nst6563 and reactor and --help LOl I'm on my way to tuning. --- Edit lmao that was a difficult one for all three of us LOL. rofl. right in the help file derp. amazing no one ever checks the helpfile....it's the little things that get ya |
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Will this keep auto tuning? it don't even touch 361 KH/s.
GSD 0: | 855 MHz | 247.3/347.2 KH/s | A: 38 R: 0 H: 4
You should set log = true also so you have a record of the autotune results and how long it took. When I ran autotune, I left it for a couple hours and checked back and it was finished. |
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they all have the 49.9k mod and they stopped accepting shares so i resoldered the 49.9k resistor thinking that i had a bad connection or something and when i plugged it in same thing it wasnt working so i took a closer look it looks like the chips got hot then started to break apart? not really sure but 3 of my gridseeds are down because of this. one of them the 1500uf 2.5v capacitor the black plastic base is melted. Well...they both have to do with regulating the voltage...and the UP0111 chip "was designed to be able to continuously deliver a stable 600mA"... If the resistor mod is causing a higher current draw, that could stress it to the point of failure. It looks like the first chip is easier to get (Mouser supposedly has them) than the UP0111. I did a quick search on TI and couldn't find anything that would deliver the 600mA specification on the UPI chip. I'll see if I can find a match from another manufacturer (or maybe someone else can beat me to it). The highest available I found from TI was a 400mA delivery...so maybe I missed something there. The rest of the specs matched, just not the mA rating. |
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First looks like: LISTING: 1 element(s)
< COMPONENT INSTANCE >
Reference Designator: U29
Package Symbol: SOT23-6
Component Class: IC
Device Type: PCF8574_P_0_SOT23-6_74HC2GU04
Value: 74HC2GU04
Placement Status: PLACED
origin-xy: (1467.57 867.87)
rotation: 0.000 degrees
not_mirrored
Function(s):
Designator: F8
Type: PCF8574_P_0_SOT23-6_74HC2GU04
Pin(s): 1, 6, 3, 4, 2...
Properties attached to component definition
VALUE = 74HC2GU04
Pin IO Information:
Pin Type SigNoise Model Net
--- ---- -------------- ---
1 UNSPEC CLK
2 UNSPEC DGND
3 UNSPEC CLK
4 UNSPEC N31664886
5 UNSPEC OVDD33
6 UNSPEC N31664859
Second looks like: LISTING: 1 element(s)
< COMPONENT INSTANCE >
Reference Designator: U9
Package Symbol: SOT23_5
Component Class: IC
Device Type: SN74AHCT1G125_0_SOT23_5_UP0111
Value: UP0111
Placement Status: PLACED
origin-xy: (296.48 1497.43)
rotation: 90.000 degrees
not_mirrored
Function(s):
Designator: F4
Type: SN74AHCT1G125_0_SOT23_5_UP0111
Pin(s): 3, 4, 1, 5, 2
Properties attached to component instance
ROOM = OCD_CRT
Properties attached to component definition
VALUE = UP0111
Pin IO Information:
Pin Type SigNoise Model Net
--- ---- -------------- ---
1 UNSPEC OVDD33
2 UNSPEC DGND
3 UNSPEC OVDD33
4 UNSPEC N31931394
5 UNSPEC DVDD_PLL
Hopefully you or one of the experts here know what they are because I don't. thanks for the reply they look like IC chips but I cant seem to find where to buy them anywhere. U29 is a "dual unbuffered inverter" http://www.nxp.com/products/logic/buffers_inverters_drivers/series/74HC2GU04.html - see the ordering tab on that same page U9 is a low dropout regulater from UPI Semiconductor. http://www.upi-semi.com/product/ProductInfo.aspx?ProductID=156 I couldn't find anyplace to directly order this one in the quick couple minutes I searched it, but if you can't find it, chances are TI or Fairchild or STI have something that will match the specs nearly exactly. How did they break? |
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Radio shack has your average 25-40w (non adjustable) irons for around $14. I don't recall if they come with a fine tip or not. I think they sell tips for up to $5. It's been awhile to be honest since I've looked into buying equipment.
Actual 'stations' are much more generally. Some come with a small number of accessories, others don't. You could check Amazon/google to see the range.
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If you're just bridging the one or two locations then it should work. When I first did the bridge mod I just used a small portion (1/4 inch or less) of the lead from a 1/8w axial resistor with a bend in it for easy handling with a pair of tweezers. one or two? In the OP's picture I see only one green square location. It really depends. Just bridging the one location listed in the OP then you'll need to specify voltage=1 in the command line in order to activate the higher voltage. If you check out this guide here https://bitcointalk.org/index.php?topic=575315.0 it has many pictures of the different voltmods. For bridging the location(s), in his pics, the blue circle enables the use of the voltage=1 parameter in some mining software. Bridging location 2 (the yellow circle) enables the higher voltage without the need of specifying the voltage=1 parameter. Ok, thanks, nst6563. I am not touching either of those, I was going to use the circuitwtriter pen, but I think the tip is to large and it might squeeze to much goo out. man i wish I knew how to solder perfectly. I have a gridseed here unmodded that is just begging for the permanent volt mod. I'd like to say it's really easy...but that's because I've been soldering for at least 15 years, but honestly...if you're just bridging two locations, it is easy. Just google some soldering tutorials and practice on some junk first. Anything will do, old phone, old hard drive, etc. Just as long as the components are small, it will give you something to practice on without the worry of ruining something. If you use a small piece of wire, just tin the wire with solder first, lay it across the location to bridge and touch the iron to each pad just long enough to melt the solder. Trim off any excess and you're done. Just remember not to use a LOT of solder. A little goes a long way. That's about the best advice I could give short of paying someone to do the mod (which in my opinion is actually counter-productive as you're spending yet more money). |
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If you're just bridging the one or two locations then it should work. When I first did the bridge mod I just used a small portion (1/4 inch or less) of the lead from a 1/8w axial resistor with a bend in it for easy handling with a pair of tweezers. one or two? In the OP's picture I see only one green square location. It really depends. Just bridging the one location listed in the OP then you'll need to specify voltage=1 in the command line in order to activate the higher voltage. If you check out this guide here https://bitcointalk.org/index.php?topic=575315.0 it has many pictures of the different voltmods. For bridging the location(s), in his pics, the blue circle enables the use of the voltage=1 parameter in some mining software. Bridging location 2 (the yellow circle) enables the higher voltage without the need of specifying the voltage=1 parameter. |
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Just curious....but is the 5v USB fan mod on these gridseeds that have the failed USB ferrite bead? It could be the added current usage of the fan stresses it enough over time to the point of failure as I'm sure the USB circuitry wasn't designed with the load of the fan in mind. I'm not saying it can't handle it, because there is plenty of power from the USB port for a fan, but given the build quality of these things it really wouldn't surprise me.
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I've been running the latest build as of this morning since an hour after it was posted, and it's been running strong ever since. Haven't had any problems at all with it.
I'm running 6 gridseeds attached to a powered USB hub on a machine (4.5Ghz i7, 24GB RAM, 5-disk raid + SSD) running Win8.1.
Maybe it's something to do with your setups? Or a resource issue running a higher number of gridseeds and or blades?
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How do we specify individual chip frequencies in the config file?
Like this?:
"gc3355-freq" : "\\\\.\\COM9:1200:0,\\\\.\\COM9:1200:1,\\\\.\\COM9:1225:2,\\\\.\\COM9:1225:3,\\\\.\\COM9:1225:4",
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