Topic: GridSeed 5-chip USB miner voltage mod - page 85. (Read 156991 times)
Anyone have a compiled Windows exe for this volt mod CGminer?
You'll need a tiny bit of airflow, most people report the devices are unstable when they get hand warm. Replace the factory heat pads with quality ones or solder the fan to 5V from USB.
Andareed: did you measure the voltage output of the regulator to find out how much did this increase the voltage to? Just curious as to how much this mod changes the voltage.
Increases from 1.15v to 1.25v
so it would appear that you are bridging the equiv of one of the jumpers but which one? from the example in the diagram im assuming its R2 appears R1 is the equiv r23 above jp7 10K. this is the opposite in the antminer though! although quick calcs show that if r1 and r2 both equal 10K then Vout =1.2v which seems to be a general safe standard for Vout any higher poses risks as the chips are rated fro 1.2v - read it somewhere maybe spec for antminer chips or something not sure, but better to be safe than sorry. So i assume if you trace your bridge to the resistor you could swap it out for a 10k resistor - providing r1 is 10k to start with. challage is finding the r1 and r2 equiv....
games begin..
games begin..
Would you mind posting some stats on your accepted pool hash rates at the different speeds you're testing please?
Thanks for sharing your mod! I'm going to test it on my units when they come in later this week.
Thanks for sharing your mod! I'm going to test it on my units when they come in later this week.
This sounds great.If I had steady hands I would try this but since I'm happy with the results so far with my OC (850MHz is stable for my miner,anything above that and I get shares not being submitted-unstable connection to the pool,no HW errors,low rejects rate at 1GHz) so I'm not too worried about getting the best out of it (I'm trying to sell off my HD6950 but without an anti-static bag I can't sell it as I need to find someone selling one that can fit it in) 
@Andareed...I don't suppose you reside in the NYC metro area? If you did, I'd love to just bring my miners over to you and pay you to do this hardware mod.
Andareed: did you measure the voltage output of the regulator to find out how much did this increase the voltage to? Just curious as to how much this mod changes the voltage.
Andareed you are such a dude! Thank you for this
There are SMD jumpers available however I'm not sure how small jumper we would need. One test miner should be with me by thursday. I can't wait to test it out
I can measure later today, but the're almost certainly 0.1"/2.54mm pitch. Something like this would work:
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&pa=2076826&productId=2076826
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&pa=112432&productId=112432
Or http://www.digikey.com/product-detail/en/S1731-46R/952-1581-6-ND/2281857
There are SMD jumpers available however I'm not sure how small jumper we would need. One test miner should be with me by thursday. I can't wait to test it out
I can measure later today, but the're almost certainly 0.1"/2.54mm pitch. Something like this would work:
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&pa=2076826&productId=2076826
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&pa=112432&productId=112432
Conductive pens might be a viable option. Someone needs to try that out.
There are SMD jumpers available however I'm not sure how small jumper we would need. One test miner should be with me by thursday. I can't wait to test it out
Yeah you are absolutely right. Pencil trick just makes things worse. Even with 850mhz and voltage=1 now I get a lot of HW errors. Time to break out the eraser!
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
It was really annoying to do. What I did was get a gob onto the general bridge area, and then ran the solder tip (I have a fairly fine tip) along both sides of the bridge to collect any stray solder.
EDIT: Going to try using this to solder the bridge: http://www.ebay.com/itm/151169919397
Nice work
Cant imagine that solder paint will help though. Try a piece of very thin fuse wire a couple of inches long so you can hold it easy. Tack it on to the 2 contacts then break off the excess by bending back and forth or use a small blade to cut it.
Interesting idea, but where do you get fuse wire from? I wonder if folding a few layers of tin foil would work.
Yeah you are absolutely right. Pencil trick just makes things worse. Even with 850mhz and voltage=1 now I get a lot of HW errors. Time to break out the eraser!
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
It was really annoying to do. What I did was get a gob onto the general bridge area, and then ran the solder tip (I have a fairly fine tip) along both sides of the bridge to collect any stray solder.
EDIT: Going to try using this to solder the bridge: http://www.ebay.com/itm/151169919397
Nice work
Cant imagine that solder paint will help though. Try a piece of very thin fuse wire a couple of inches long so you can hold it easy. Tack it on to the 2 contacts then break off the excess by bending back and forth or use a small blade to cut it.
Wow! This is cool! I wish I had the skills to even contemplate such a delicate HW hack...alas, the last thing I tried to solder turned into a giant silver blob. 
Andareed are you running with or without the fan @ 950?
Without. I have two rows of six units lying on their side, top to bottom, with a pair of 120mm fans blowing across them. I've only modded a single unit so far, though 10-15% more heat isn't something I'm going to worry about.
Andareed are you running with or without the fan @ 950?
Yeah you are absolutely right. Pencil trick just makes things worse. Even with 850mhz and voltage=1 now I get a lot of HW errors. Time to break out the eraser!
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
Edit: Erased and back to normal. Zero HW errors @ 850mhz. Damn - now to find someone who can solder a bridge that tiny.
It was really annoying to do. What I did was get a gob onto the general bridge area, and then ran the solder tip (I have a fairly fine tip) along both sides of the bridge to collect any stray solder.
EDIT: Going to try using this to solder the bridge: http://www.ebay.com/itm/151169919397
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