Quote from: ZiG on April 22, 2014, 02:26:41 AM

Quote from: powersup on April 21, 2014, 11:45:13 PM

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.

Quote from: ZiG on April 11, 2014, 06:35:41 PM

Guys...don't be fooled...

You are replacing R139...27k with higher value...47k to 51k... NOT R52...

R52 is in the Feedback Loop of the Voltage regulator...

Refer to the schematics...

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From unpublished PM reply to Wolfey2014 from April 1 2014...(never sent to him...after looking at his "claims" to others people results and annoying adds all over the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

I have been experimenting with this since the beginning days of this thread...soldering the trim pod 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

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?