Topic: GridSeed 5-chip USB miner voltage mod - page 38. (Read 156988 times)

I modified the ORIGINAL image of Sandor111 ...(Thanks Sandor) :



With black lines are the points of interest from my post...R46 bridge (0 Ohm = short from schematics)...

R139...33K according to Sandor111 ...on Gridseed schematics is clearly marked as 27K...I never took a measurement on the actual board resistor...

R52 marking...and the corresponding resistor on the board...

If R139 is 33K...replace in my calculations "27K" ...with "33K"...

Any comments or questions are welcome...

Cheers,

ZiG

EDIT

@Sandor111...:
Hey Sandor...did you ACTUALLY measure these resistors values from the board itself...Please confirm...

Zig is 100% correct.



this is in line with the schematic.

The zig mod has great potential, in fact it would be a good way to test the limits for duel mining.

Thanks Zig althought this post totally confused the hell out of me lol.... Now I am totally lost in regards to modding the Gridseed.

I thought the one best mod is to replace the position of R52 with 49.9K for a cool 1200MHz and roughly 510-515kH Although technically it may not be called R52 but this is all what we know it off as this is what states on the actual PCB board.

Some more instruction and pictures and detail about the "Zig mod" on how you can adjust the voltage in the 20mv steps..

Are you saying your mod works exactly like the Original mod but you can software adjust the voltage? and possibly reduce the voltage back to stock so some people can still dual mine?

EDIT : I just read your EDIT - Congrats on the switch this is what I was talking about in the other thread - AWESOME and congrats again!! although this is perfect it may be alittle hard for the average person am I correct?

I would rather just solder 49.9k on the R46 pads seems much easier, but there is not much detail around this. Is the results exactly like the last confirmed vmod3? 510KH @ 1200Mhs <0-5hw per day if any.

By default upon soldering the new chip on r46 is it EXACTLY like vmod3 without doing anything? And how do you adjust the voltage? Via Software?

interesting. I will be trying this on my next unit!

This question is if R139 is 27, or 33K

If you zoom in on the schematic you can see the schematic has its value as 127K

however if you look at the bill of materials (https://github.com/gridseed/usb-miner/blob/master/hardware/GC3355%20USB%20BOM.xlsx) you can see the value of R139 is 33K

Does anyone have a datasheet on the UP1509?

I told them this...10 days ago...

Let me share this...:

From unpublished PM reply to Wolfey2014 from April 1 2014...(never sent to him...after looking at his "claims" to others people results and annoying adds all over the place)...:

DVDD+ adjustment -

1. First - cut the small bridge in place of R46...it is a trace on the main board...connecting to last pads to the left of VID0/1 resistors row (R63, R64, R66, R139 and non existing capacitors in between ) ...
2. Second - solder a resistor to these ( now separate ) pads with value = to desired value in the VID chain - 27K (R139) ...these resistors are in series...Rmod + R139 = Rtotal...
 
So... Rmod = Rtotal - 27K (R139) ...
Example...:
For Rtotal = 47K ...Rmod = 47K - 27K = 20K ...solder 20K in place of the R46 (bridge)
For Rtotal = 49K ...Rmod = 49K - 27K = 22K ...Solder 22K ...very standard value on the top of R46 pads...
etc...

From now on I will call this

"ZiG mod"

...because I don't mind sharing ...but don't want anybody like Wolfey2014 to claim that it is his/her...

I have been experimenting with this since the beginning days of this thread...soldering the trim pot of 50K to R46 pads...this way the voltage to the chips can be adjusted smooth in 10-20mV small steps to check the hash rates...

Another advantage is that you DON"T NEED to remove ANY of the original components from the Gridseed...no de-soldering of R139 ...

And one more advantage is ...you CAN REVERSE the voltage mod to the ORIGINAL by simply removing the Rmod from R46 pads + restoring the bridge R46= 0 Ohm...or even simpler...making short on Rmod/R46...

Hope it is bringing more light ...and understanding of what Exactly are we all doing...Modding VID reference on the Voltage regulator chip of Gridseeds...That's it...!

Thanks for reading this...and ...Good luck modding...!

ZiG

Edit...:   Some body was exploring the idea of external small switch ( Like DIP switch to be able to go in "MOD/Overclocked" to "Normal/Stock" speed ...I have that switch soldered at the ends of my trim pod ...and it is doing exactly that...MODE SW "OC/Turbo - Stock/Normal"... using the short of R46...or trim pot value...

Enjoy...  

I am running at 1200 Mhz  each of my miners with the 49.9 resistors. They are working great.

can anyone actually confirm the value of the resistor removed for the mod?  Ive been looking at the schematic  and according to the schematic its a 127k resistor, but the bill of Materials has it as 33k?  also it isnt R52, in fact it R139 for anyone who is interested.

Look up please.

CPUMiner fork? please elaborate.

I have tried multiple frequency from 700 to 1175.  I have also loaded a fresh image of scripta.


I have tried all these and nothing.  Is there a correct procedure for resting the units?  I simply pressed the reset button while i had 12V power connected.

I let the units run overnight and still 0 shares submitted.  I will try disconnecting the units for a couple of hours.

+1

I encourage everyone that wants this CPUminer fork for windows ( like me ) to write to http://cryptomining-blog.com

they have been compiling ones before and worked great. Hopefully if enough ask them they will do it with this one

I've been using CPU miner on my gBlade.  Last time I checked my hashrate was about 2900 x 2 server side. This is with freq at 850mhz.

Would like to test your fork, but I'm on windows.

Take a look at my cpuminer fork, it has hashrate display along with many unique features.

Now if CPU miner was fixed to show KH/s it will be perfect

Yup, you had the exact same problem as me with BFGminer. showing 1000 on bfg but only 300/400 on pool.

went on CPUminer and got 850 to 1100 and found alot of shares, blocks.

That is for single mining only.
Issue with reject on some pools has been fixed BTW.

Is there anyone with a Gridseed blade that wants to help me add support for it?

OK guys, I was using BFGminer to have both seeds in one instance. But this was not working It was showing 1000 KH/s on bfgminer, but mining pools where showing an average of 400 KH/s.

I got sick of it and change to CPU Miner, running one instance per each gridseed. Now I am hashing on the Mining Pool side at 850 to 1010 KH/s

I EVEN FOUND 2 BLOCKS! am i supposed to get credit for finding blocks?
I am happy

Try different usb cable, try different usb port, try different power barrel connector , reset miner  let us know how that goes

What frequency setting are you using for the the two that won't submit shares?  Is it the same frequency as the others or lower?  Individual Gridseed vary in the amount they can be overclocked.