GekkoScience Compac BM1384 Stickminer Official Support Thread

[gt_addict]

VCore of zero could be the ASIC is shorted and killing power, or the buck chip has a problem. If it starts up with almost no initial current it's more likely the buck chip, but if it pulls a spike of high current when first plugged in and then drops to near zero points to the ASIC.

As Sidehack says, either ASIC shorted or buck not starting up. Somewhat surprised that would cause the cp2102 to not come up, though. If you can, with it disconnected, check if the pot is okay and if the fet is showing a dead-short.

PM sent, but if you don't manage to fix it, very interested in paying you what it cost you

Cheers,

Allan.

Thanks for the suggestions guys. When i get some time ill get the multimeter out and take a look if i cant then i may well take allan up on his offer.

[andymanone]

VCore of zero could be the ASIC is shorted and killing power, or the buck chip has a problem. If it starts up with almost no initial current it's more likely the buck chip, but if it pulls a spike of high current when first plugged in and then drops to near zero points to the ASIC.

As Sidehack says, either ASIC shorted or buck not starting up. Somewhat surprised that would cause the cp2102 to not come up, though. If you can, with it disconnected, check if the pot is okay and if the fet is showing a dead-short.

PM sent, but if you don't manage to fix it, very interested in paying you what it cost you

Cheers,

Allan.

Thanks for the suggestions guys. When i get some time ill get the multimeter out and take a look if i cant then i may well take allan up on his offer.

Hi gt_addict,
short question, what do you think, should I keep your Gekko at Gekkorun, will you join soon the race?
Or should I remove your racer from the DB?

Thanks & Cheers,
andY

[bookstime6]

I have one of the new 2xBM1384 miners.

Using cgminer (it appears there as one AMU GS-10008) I don't seem to be getting anything above 530Mh/s or so. I increased the Vsupply to something around 0.7V (no multimelter, just turned it clockwise but not all the way).

I've tried frequencies 200 - 350MHz, none seem to give much higher hashrate. My USB hub is only rated at 1A, I suppose the problem is I need higher current supply?

I'm mining at kano.is, although it seems this isn't the best to use with lower powered miners.

[sidehack]

If you have a question with the 2Pac, look for answers in the 2Pac thread. It's also got power charts that tell you how much current you'd expect to draw at various frequencies. 1A is nowhere near sufficient for 200MHz.

[leowonderful]

Try 150 or 100. Usually if you try to use the Gekkos at too high power consumption they'll just run albeit at very slow rates. You'll need either a better USB hub or a Y-shaped USB splitter. I use one in place of a hub and I pop one onto my PC for data transfer and the other onto a wall socket and I have steady and stable hashing with fans on the 2pac. Cheap and effective.

[NotFuzzyWarm]

I'm mining at kano.is, although it seems this isn't the best to use with lower powered miners.

No it isn't. Most pools are expecting miners that are THs+ and their minimum diff's reflect that.
Use solo.ckpool.org as the name implies it is a lottery solo pool however it accepts ALL speed miners esp. sticks.

[gt_addict]

VCore of zero could be the ASIC is shorted and killing power, or the buck chip has a problem. If it starts up with almost no initial current it's more likely the buck chip, but if it pulls a spike of high current when first plugged in and then drops to near zero points to the ASIC.

As Sidehack says, either ASIC shorted or buck not starting up. Somewhat surprised that would cause the cp2102 to not come up, though. If you can, with it disconnected, check if the pot is okay and if the fet is showing a dead-short.

PM sent, but if you don't manage to fix it, very interested in paying you what it cost you

Cheers,

Allan.

Thanks for the suggestions guys. When i get some time ill get the multimeter out and take a look if i cant then i may well take allan up on his offer.

Hi gt_addict,
short question, what do you think, should I keep your Gekko at Gekkorun, will you join soon the race?
Or should I remove your racer from the DB?

Thanks & Cheers,
andY

Hi Andy,

Remove it for now please. Thanks 

[andymanone]

Hi gt_addict,
short question, what do you think, should I keep your Gekko at Gekkorun, will you join soon the race?
Or should I remove your racer from the DB?

Thanks & Cheers,
andY

Hi Andy,

Remove it for now please. Thanks  

Hi gt_addict,

thanks for your response, so I´ll remove it.
But if you wants to join the race again (e.g. with a 2PAC), don´t hesitate .

Cheers,
andY

[cavaliersrus]

hey sidehack how is the warrenty work going ?

[sidehack]

Done. Come and get 'em.

[cavaliersrus]

excellent sir thank you so much did you remember what was wrong with the 2 i had... the one with paint over the led was mine and the other one was the one that phil sent me... he was wondering what killed it

[sidehack]

Phil's I replaced the ASIC. Yours I saw no issues with, ran it for a week with no errors.

[cavaliersrus]

alright yea mine for some reason i had it die on me and it would not run on my 2 computers but then again i brought that one gridseed to you and you touched it and it worked lol... i will try to get that way sometime soon

[philipma1957]

Good that side hack could replace the ASIC

That was a compac. I had 25 compacs I think two died over a two year period.

I am down to 1 compac and 1 2pac.

[Morguk]

Can we use ASICBOOST on these?

[-ck]

Can we use ASICBOOST on these?

Lol, best asicboost post yet

[ab1jx]

Fairly new here.  I haven't read all 129 pages of this thread but I have 2 questions.  (1) is there a BM1387 version of this project in the works? and (2) why is the heatsink green instead of black?  Black is a much more efficient radiator of heat, even just a quick coat from a spray can.

[sidehack]

(1) No there isn't

(2) Because I wanted it to be

[cavaliersrus]

black is excellent in heat disipation when it is like the sun not a heatsink like his... if this was the case why are every computer heatsink out there from factory to the aftermarket coolers silver...

reason is cause the metal is the sinking of heat via direct contact color is just to make it look good and personally i like the green but i also like the black like on my futurebit moonlanders

[ab1jx]

black is excellent in heat disipation when it is like the sun not a heatsink like his... if this was the case why are every computer heatsink out there from factory to the aftermarket coolers silver...

reason is cause the metal is the sinking of heat via direct contact color is just to make it look good and personally i like the green but i also like the black like on my futurebit moonlanders

Because silver is the bare aluminum, it's cheaper to make them slightly bigger than go through a painting step.  Actually anodizing would probably be better since it's thinner.  I built this power supply about 40 years ago, it mostly ran hot until I painted the heat sinks black.  Nothing else I built 40 years ago is still running.



Anyway it's too bad there isn't a BM1387 stickminer, or something in the < 100 watt range.