GridSeed 5-chip USB miner voltage mod - page 48.

david123

legendary

Activity: 1022

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Quote from: jamieb81 on April 12, 2014, 12:57:58 PM

I had troubles with BFGminer, miners were shown mining in BFG with 0HW errors but I was getting litteraly no hash speed on pool side,
switched back to CPUminer and hashrate and share rate flew trough the roof.

PS: how's that IPO pool going so far? good results?

Ow, thanks, I didn't come up with that (I mean: that it is a software problem). A bit unsatisfying that Hashra will not be useable as intended
then, but anyways..

IPO is really nice, I'll stay with them. But it's difficult to estimate the payout, it depends a lot on when you sell these coins. It's kind of a mixture
of mining and trading Cheesy

jamieb81

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Quote from: david123 on April 12, 2014, 12:51:41 PM

Quote from: simon66 on April 12, 2014, 12:46:06 PM

I get the same but if you leave it mining for a while, the pool side will stabilize. Keep in mind that pool side values are way off and it doesn't really matter. All you should care is "accepted" shares and you get paid per accepted share and not Kh/s value.

What pool you use?

Yeah, that's right.. Currently I use ipominer.com, where the rate is usually quite accurate and stabilizes after just a couple of minutes. If I let it run @850 for 10 minutes, I see 340 for example, and if I go up to 1150 or 1200, the reported rate stabilizes quickly at a lower level, like 280, where it stays. The accept rate is higher at 1200, but as ipominer is vardiff and bfgminer reports wrong diff "0", I'm not sure if this has any meaning..

I had troubles with BFGminer, miners were shown mining in BFG with 0HW errors but I was getting litteraly no hash speed on pool side,
switched back to CPUminer and hashrate and share rate flew trough the roof.

PS: how's that IPO pool going so far? good results?

wolfey2014

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Activity: 378

Merit: 250

Quote from: nemercry on April 12, 2014, 12:44:34 PM

Quote from: wolfey2014 on April 12, 2014, 12:21:49 PM

Quote from: nemercry on April 12, 2014, 12:16:57 PM

Quote from: wolfey2014 on April 12, 2014, 11:58:24 AM

Quote from: nemercry on April 12, 2014, 11:38:26 AM

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

...
What the FB is or what it does is irrelevant.
...

You actually made me laugh hard Cheesy

.

So, you decide to bore people with our antics,,,okay- fine!
and I quote....
"which acts also like a fuse" WRONG!
Laugh at that Grin

Each object which bricks at a certain amount of power is technically a fuse, yes. Roll Eyes

So over 3A the ferrite pearl bricks.

NO!
It is litterally a BLOWN component!! Roll Eyes

Just because a transistor blows, doesn't make it a fuse, active or passive, technically or otherwise! Geesh!
Note: Anyone who refers to a component as an "object" is illiterate! Anyone who calls a blown ferrite bead or any other component a fuse, other than an actual fuse, is incompetent and not to be trusted with electronics work! Shocked

david123

legendary

Activity: 1022

Merit: 1004

Quote from: simon66 on April 12, 2014, 12:46:06 PM

I get the same but if you leave it mining for a while, the pool side will stabilize. Keep in mind that pool side values are way off and it doesn't really matter. All you should care is "accepted" shares and you get paid per accepted share and not Kh/s value.

What pool you use?

Yeah, that's right.. Currently I use ipominer.com, where the rate is usually quite accurate and stabilizes after just a couple of minutes. If I let it run @850 for 10 minutes, I see 340 for example, and if I go up to 1150 or 1200, the reported rate stabilizes quickly at a lower level, like 280, where it stays. The accept rate is higher at 1200, but as ipominer is vardiff and bfgminer reports wrong diff "0", I'm not sure if this has any meaning..

simon66

sr. member

Activity: 423

Merit: 250

Quote from: david123 on April 12, 2014, 12:42:45 PM

Quote from: bon4ire on April 12, 2014, 12:32:00 PM

Revert back?

That would be a bit boring, no? Cheesy

Down at 850 it's doing minerside as before the mod, and poolside slightly worse.
The output leads to the same direction: Apr 12 17:41:13 bfgminer[23935]: 20s:373.7 avg:360.5 u:309.2 kh/s
I checked with the multimeter, it's certainly a 47k resistor. That's all really strange...

I get the same but if you leave it mining for a while, the pool side will stabilize. Keep in mind that pool side values are way off and it doesn't really matter. All you should care is "accepted" shares and you get paid per accepted share and not Kh/s value.

What pool you use?

nemercry

sr. member

Activity: 339

Merit: 250

Vice versa is not a meal.

Quote from: wolfey2014 on April 12, 2014, 12:21:49 PM

Quote from: nemercry on April 12, 2014, 12:16:57 PM

Quote from: wolfey2014 on April 12, 2014, 11:58:24 AM

Quote from: nemercry on April 12, 2014, 11:38:26 AM

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

...
What the FB is or what it does is irrelevant.
...

You actually made me laugh hard Cheesy

.

So, you decide to bore people with our antics,,,okay- fine!
and I quote....
"which acts also like a fuse" WRONG!
Laugh at that Grin

Each object which bricks at a certain amount of power is technically a fuse, yes. Roll Eyes

So over 3A the ferrite pearl bricks.

david123

legendary

Activity: 1022

Merit: 1004

Quote from: bon4ire on April 12, 2014, 12:32:00 PM

Revert back?

That would be a bit boring, no? Cheesy

Down at 850 it's doing minerside as before the mod, and poolside slightly worse.
The output leads to the same direction: Apr 12 17:41:13 bfgminer[23935]: 20s:373.7 avg:360.5 u:309.2 kh/s
I checked with the multimeter, it's certainly a 47k resistor. That's all really strange...

bon4ire

newbie

Activity: 30

Merit: 0

Quote from: david123 on April 12, 2014, 12:25:24 PM

Hey guys, I just did the R52 replacement with a 47K SMD resistor at one of my units, worked fine, had no troubles while
doing the mod (I'll post pictures later).
Now, locally I see the increased hash rate as expected (e.g. close to 500 @ 1150MHz) with no or few HW errors and rejects,
but poolside it looks much worse (below 300). Now I went down to 1000 MHz, but it gets even worse.. 56 KHs poolside Sad

I'm using a Raspberry Pi with Hashra.

Any ideas..?

Revert back?

david123

legendary

Activity: 1022

Merit: 1004

Hey guys, I just did the R52 replacement with a 47K SMD resistor at one of my units, worked fine, had no troubles while
doing the mod (I'll post pictures later).
Now, locally I see the increased hash rate as expected (e.g. close to 500 @ 1150MHz) with no or few HW errors and rejects,
but poolside it looks much worse (below 300). Now I went down to 1000 MHz, but it gets even worse.. 56 KHs poolside Sad

I'm using a Raspberry Pi with Hashra.

Any ideas..?

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: nemercry on April 12, 2014, 12:16:57 PM

Quote from: wolfey2014 on April 12, 2014, 11:58:24 AM

Quote from: nemercry on April 12, 2014, 11:38:26 AM

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

...
What the FB is or what it does is irrelevant.
...

You actually made me laugh hard Cheesy

.

So, you decide to bore people with our antics,,,okay- fine!
and I quote....
"which acts also like a fuse" WRONG!
Laugh at that Grin

Here is the right way to do it.
IF you need it done by a professional for you, PM me.
****************************************************

****************************************************

nemercry

sr. member

Activity: 339

Merit: 250

Vice versa is not a meal.

Quote from: wolfey2014 on April 12, 2014, 11:58:24 AM

Quote from: nemercry on April 12, 2014, 11:38:26 AM

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

...
What the FB is or what it does is irrelevant.
...

You actually made me laugh hard Cheesy

.

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: nemercry on April 12, 2014, 11:38:26 AM

Quote from: ?? on ??

You don't have to replace the FB just to see if the unit will still work or not.
Bypass it and fire up the pod again and see if it will mine in Scrypt ONLY mode! Wink

Make sure you clean up those solder connections first, too.
If it works, get and replace the FB. If not, then it's now a brick and will make a nice ornament or paper weight.

We've been saying all along, ever since the first attempt at over-volting. This mod is for Scrypt only mode!
Do not attempt to use SHA or DUAL mode with this mod. Bad things can happen! Wink

...
*************************************************

*************************************************
...

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

Nemercry, your advice is not needed and it is also incorrect!
It is perfectly fine and okay to bypass the FB for a quick test to see if the unit will fire up again, in Scrypt only mode!
The best way to check for a short 'first' is to use a DVM, before power is applied!
IF there is a short somewhere, replacing the FB will be a waste of time, anyway!
What the FB is or what it does is irrelevant. But, it is in series with the circuit, not across it! It is NOT intended to act as a fuse either but, just like a ZD, if overloaded or overvolted (in a ZD's case) a ZD will short out a circuit. In the case of an FB, it will burn up and open the circuit. But that is not it's primary function in any case.
Anyway, the FB burning up is simply an indication of a severe overload or short 'after' it in the circuit. So some probing for a short 'after the FB' with a DVM is definitely advisable!
Nemercry, if you have a complaint or concern, PM me or the moderator.
Don't bore people with this stuff in public.

nemercry

sr. member

Activity: 339

Merit: 250

Vice versa is not a meal.

Quote from: ?? on ??

You don't have to replace the FB just to see if the unit will still work or not.
Bypass it and fire up the pod again and see if it will mine in Scrypt ONLY mode! Wink

Make sure you clean up those solder connections first, too.
If it works, get and replace the FB. If not, then it's now a brick and will make a nice ornament or paper weight.

We've been saying all along, ever since the first attempt at over-volting. This mod is for Scrypt only mode!
Do not attempt to use SHA or DUAL mode with this mod. Bad things can happen! Wink

...
*************************************************

*************************************************
...

Actually i would be really carefull and NOT just soldering it. It's actually a frequency filter which acts also like a fuse.
As its possible that your pod is still alive, dont break it with just soldering the broken parts.

From wikipedia:
A ferrite bead is a passive electric component that suppresses high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the dissipation of high frequency currents in a ferrite ceramic to build high frequency noise suppression devices. Ferrite beads may also be called blocks, cores, rings, EMI filters, or chokes.[1]

@Wolfey: Please stop to give out such advices and dont post your picture in every second post with highest resolution.

CryptKeeper

legendary

Activity: 2044

Merit: 1055

Quote from: nemercry on April 12, 2014, 11:02:22 AM

Hey Cryptkeeper,

the item you are searching for is this one(Replace FB23 and FB24 with that):
http://de.farnell.com/wurth-elektronik/742792121/ferrit-smd-300ohm-3a-1206/dp/1635756RL

reaplce it and never try to use dualmining again

...

Thanks, highly appreciated!

@wolfey2104: I will try to shorten the connections as you suggested, maybe there's some live in it left! Wink

Ferris419

hero member

Activity: 1008

Merit: 501

Quote from: nemercry on April 12, 2014, 11:06:53 AM

Quote from: Ferris419 on April 12, 2014, 09:58:41 AM

Ok so I did the voltage mod on all 14 of my gridseeds last night. When I went to bed all 14 were mining just fine. Today I moved to a different pool and I just checked on my cgminer only 11 were submitting shares 3 of them had 0 WU and weren't submitting any shares but the red and green lights are flashing on all 14 Gs ? Any ideas? It was only running for a half hour when I noticed this should I just let it run longer and see if they start working like they should?

Do you still use fans on the units? Did they submit shares again, after restarting cgminer?

Yeah I still use the fans and nope I can't get the 3 to submit any shares and the WU stays at 0.0 .... The red and green LEDs are acting normal and it shows that it's hashing but no luck

nemercry

sr. member

Activity: 339

Merit: 250

Vice versa is not a meal.

Quote from: Ferris419 on April 12, 2014, 09:58:41 AM

Ok so I did the voltage mod on all 14 of my gridseeds last night. When I went to bed all 14 were mining just fine. Today I moved to a different pool and I just checked on my cgminer only 11 were submitting shares 3 of them had 0 WU and weren't submitting any shares but the red and green lights are flashing on all 14 Gs ? Any ideas? It was only running for a half hour when I noticed this should I just let it run longer and see if they start working like they should?

Do you still use fans on the units? Did they submit shares again, after restarting cgminer?

ZiG

sr. member

Activity: 406

Merit: 250

Quote from: nemercry on April 12, 2014, 11:02:22 AM

Quote from: CryptKeeper on April 12, 2014, 09:43:55 AM

Don't try this at home, kids:

I've tried to mine BTC with a volt-modded unit... Cry

It seems to me that FB23 and FB24 are gone, does anybody has the specs? Maybe I can replace them.

Hey Cryptkeeper,

the item you are searching for is this one(Replace FB23 and FB24 with that):
http://de.farnell.com/wurth-elektronik/742792121/ferrit-smd-300ohm-3a-1206/dp/1635756RL

reaplce it and never try to use dualmining again

...

Quite possible the Gridseed chip(s) are fried already...or Voltage supply parts...

nemercry

sr. member

Activity: 339

Merit: 250

Vice versa is not a meal.

Quote from: CryptKeeper on April 12, 2014, 09:43:55 AM

Don't try this at home, kids:

I've tried to mine BTC with a volt-modded unit... Cry

It seems to me that FB23 and FB24 are gone, does anybody has the specs? Maybe I can replace them.

Hey Cryptkeeper,

the item you are searching for is this one(Replace FB23 and FB24 with that):
http://de.farnell.com/wurth-elektronik/742792121/ferrit-smd-300ohm-3a-1206/dp/1635756RL

reaplce it and never try to use dualmining again

...

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: CryptKeeper on April 12, 2014, 10:43:22 AM

Quote from: wolfey2014 on April 12, 2014, 10:37:41 AM

Quote from: jamieb81 on April 12, 2014, 10:26:33 AM

Quote from: wolfey2014 on April 12, 2014, 10:13:28 AM

Quote from: jamieb81 on April 12, 2014, 10:04:35 AM

He tried to to dual mine with the current voltmod

I don't see how that could have burned up those particular connections / components. Especially the fan feed wires! How the heck did they manage to overheat? Them being burned up indicates to me that the fan is the possible culprit!
These pods and those components are supposed to be able to handle a good amount of current and heat while mining in dual mode. 60W at least!
More investigation needs to occur before the actual 'reason why' can be determined.

well if modded they use like 15/20 watt, how much watt could they draw on dual mode? maybe that's the problem?

yes, obviously, they do draw more in dual or sha only mode.
The thing is, if there are lose or poor solder joint connections, this will cause a rise in current draw hence, heat and catastrophic destruction will ensue! Just like it did there...
For the fan wires to have melted and distorted the way they did, the heat from the entire pod would have to be like 350+ degrees! Highly doubtful that happened.
For the fan wires to have melted the way they did, the heat would have to be generated by the 'elements' / wires - themselves.
That's what I see. The rest of the components were burned up via a short and that, perhaps is what caused the solder connections to melt and open.
Or, I suppose it could have also all happened in a flash! That 12V connection can have as much as 30 Amps on it at any time 'surge amps' if the psu is a 30A unit. Even 10A can do it. Heck, 5A could do it too I recon but it would take longer.
It's also possible that the psu took a powder and caused the damage as well. A high current spike, a high voltage spike, of some origin could cause it as well. Something like a lightening strike could certainly cause it as well.

Yes, my PSU is 30A and I saw a flash as soon as I started mining in BTC-only mode.

I just noticed this. What is that on the positive + wire of the fan? Is that a Zener diode or resistor (burned up) inline there?
The results look to have been caused by a short.
You said you saw a flash. You didn't say where from 'exactly'.
You MUST be very concise and specific in order to assist anyone trying to help.

I am sure what ever happened, for real, is a rare occurrence. Very rare and, most likely caused by the user via some oversight or mistake or incorrect assumption.

Magic black smoke. It's always trying to escape! Wink

CryptKeeper

legendary

Activity: 2044

Merit: 1055

Quote from: wolfey2014 on April 12, 2014, 10:37:41 AM

Quote from: jamieb81 on April 12, 2014, 10:26:33 AM

Quote from: wolfey2014 on April 12, 2014, 10:13:28 AM

Quote from: jamieb81 on April 12, 2014, 10:04:35 AM

He tried to to dual mine with the current voltmod

I don't see how that could have burned up those particular connections / components. Especially the fan feed wires! How the heck did they manage to overheat? Them being burned up indicates to me that the fan is the possible culprit!
These pods and those components are supposed to be able to handle a good amount of current and heat while mining in dual mode. 60W at least!
More investigation needs to occur before the actual 'reason why' can be determined.

well if modded they use like 15/20 watt, how much watt could they draw on dual mode? maybe that's the problem?

yes, obviously, they do draw more in dual or sha only mode.
The thing is, if there are lose or poor solder joint connections, this will cause a rise in current draw hence, heat and catastrophic destruction will ensue! Just like it did there...
For the fan wires to have melted and distorted the way they did, the heat from the entire pod would have to be like 350+ degrees! Highly doubtful that happened.
For the fan wires to have melted the way they did, the heat would have to be generated by the 'elements' / wires - themselves.
That's what I see. The rest of the components were burned up via a short and that, perhaps is what caused the solder connections to melt and open.
Or, I suppose it could have also all happened in a flash! That 12V connection can have as much as 30 Amps on it at any time 'surge amps' if the psu is a 30A unit. Even 10A can do it. Heck, 5A could do it too I recon but it would take longer.
It's also possible that the psu took a powder and caused the damage as well. A high current spike, a high voltage spike, of some origin could cause it as well. Something like a lightening strike could certainly cause it as well.

Yes, my PSU is 30A and I saw a flash as soon as I started mining in BTC-only mode.

Topic: GridSeed 5-chip USB miner voltage mod - page 48. (Read 156991 times)