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Author Topic: GekkoScience is now dabbling with 16nm ASICs for new designs  (Read 75810 times)
NotFuzzyWarm
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December 13, 2016, 09:49:04 PM
 #401

Here is a great brick I have one of them.
https://www.trcelectronics.com/ecomm/pdf/hlg240h.pdf
will do 192 watts 24/7
Folks, that supply is for LED lighting and is specifically made for power LED strings in lighting panels! It is not a general purpose power supply. Those supplies are made to deliver stable fixed or adjustable (when using dimming funct) current - not stable voltage!

Typically that means that there is a set max voltage to light the LED's (typical conduction threshold drop is 1.1 to 1.6v per-LED depending on the type) and then voltage drops as needed to maintain desired current through the string. (LED brightness is set by the amount current flow through them and that is only indirectly controlled by voltage).

Now yes, if the current is dialed to max then the voltage adjust might do fine and keep ya at 12v but - point is these supplies are not designed to hold voltage steady. If you exceed the dialed in current the voltage out will drop as low as needed to produce the set current and odds are that voltage will be far below what a miner needs leading to possible Vcore regulator damage.

Just putting this warning out there....

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December 13, 2016, 11:18:51 PM
 #402

Here is a great brick I have one of them.
https://www.trcelectronics.com/ecomm/pdf/hlg240h.pdf
will do 192 watts 24/7
Folks, that supply is for LED lighting and is specifically made for power LED strings in lighting panels! It is not a general purpose power supply. Those supplies are made to deliver stable fixed or adjustable (when using dimming funct) current - not stable voltage!

Typically that means that there is a set max voltage to light the LED's (typical conduction threshold drop is 1.1 to 1.6v per-LED depending on the type) and then voltage drops as needed to maintain desired current through the string. (LED brightness is set by the amount current flow through them and that is only indirectly controlled by voltage).

Now yes, if the current is dialed to max then the voltage adjust might do fine and keep ya at 12v but - point is these supplies are not designed to hold voltage steady. If you exceed the dialed in current the voltage out will drop as low as needed to produce the set current and odds are that voltage will be far below what a miner needs leading to possible Vcore regulator damage.

Just putting this warning out there....

Hmmm, this page says constant voltage and constant current:
https://www.trcelectronics.com/View/Mean-Well/HLG-240H-12.shtml

Here is one that will go up to 264 Watts:
http://www.trcelectronics.com/View/Mean-Well/HLG-320H-12.shtml






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December 13, 2016, 11:29:46 PM
 #403

Reckon those have a switch to select CC or CV? Looks like CV mode would be fine.

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December 13, 2016, 11:38:43 PM
 #404

Reckon those have a switch to select CC or CV? Looks like CV mode would be fine.
Agreed. If it has a selectable CV mode to power banks of luminaires or panels each with its own CC circuits.
Just be aware that most LED supplies are constant-current devices to drive things like these https://images.jetcdn.net/md5/a0f47f3aa6d7435aa4fe26be51b01019.500 (in that particular model min threshold voltage is 46v though)

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December 13, 2016, 11:42:14 PM
 #405

The Meanwells are what Eyeboot has been selling for the last couple of years and are what I think he sells with the 50 port USB hubs.
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December 13, 2016, 11:52:09 PM
 #406

Constant voltage is fine, just make sure that you never buy constant current stuff to fry ur miners.

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December 14, 2016, 12:34:32 AM
 #407

With daisychaining being built in to the pods would there be a specific daisychain pcie cable available (for an additional cost) so if people were to stack/tower they the cables are tidy and not like a lathargic octopus?

Just a thought for an additional revenue stream where the materials would be relatively cheap and production straightforward.

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December 14, 2016, 12:37:33 AM
 #408

Seeing as I make cables already, it wouldn't be difficult to keep a stock of something like 8" or whatever would work best.

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December 14, 2016, 12:40:29 AM
 #409

That's exactly what made me think of it. Being a stickler for tidy cables a small link pcie would be a superb addition to the pods. I know it's more work for you but could possibly be outsourced to someone who wants to earn a few bucks.

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December 14, 2016, 12:44:56 AM
 #410

I used to expect 300 cables per week from a cable minion, but with the tools I have now I can do that in one day. I might need a cable minion if I'm already stretched thin, but for that particular need I could probably fill quota just in spare time.

I'll definitely be finding at least one minion to help assemble sticks, and eventually pods. That's for darn sure still a tedious and time-consuming job.

Got a new 28-135GH stick miner!
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December 14, 2016, 12:50:08 AM
 #411

I would assemble them for you but I'm waaay over here.
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December 14, 2016, 12:54:14 AM
 #412

Nice that as I recall you have a technical college in yer area. Ah student labor Wink

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December 14, 2016, 05:21:31 AM
 #413

Novak got a real job as a rocket scientist so that's keeping him busy.

Rocket Scientist or Rocket Engineer?

 Having known a Rocket Engineer (Doug worked for Rotary for a while, and I think he also had some input into the engines for Starship One) I have a pretty good clue about the difference.


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December 15, 2016, 02:52:39 AM
 #414

Put me down for a few each.
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December 15, 2016, 03:13:50 AM
 #415

So, Punin sent me a "Merry Christmas" email today offering to send me more samples, enough to build a few more sticks and about half a dozen pods. What a nice guy.

I also am having second thoughts about the BM1385 pod.

The chip specs of the BM1385 are pretty good. Top-clock efficiency is on par with BM1384's best-case efficiency. Estimated specs for the 10x1385 pod are 250GH at 60W DC. That's not bad; a 20x1384 pod would see about 190GH from the same power draw. That 20x1384 pod would have no legroom for undervolting, and you'd only get about 250GH if you pushed it to 100W (versus about 350GH from a 10x1385).

Pros for the 1385 are obvious - better efficiency, higher hashrate.
Cons abound - 0.4mm pin pitch sucks to work with. S7 chip harvesting requires hot air and an acetone bath just to expose the chips. It'll also mean more software dev time for VH to figure the chips out.

Cons for 1384 basically invert pros of 1385 - worse efficiency, lower hashrate.
Pros, however, are numerous - chips will be cheaper to source in bulk, and are easier to harvest. I'll already be doing that for the 2Pac anyway, and have streamlined the process after 2000 Compacs. VH's multi-chip 1384 code is only a few steps from being generalized to n>=1 chips and he's planning on doing that anyway, so by the time 2Pac drivers are rolled out they'd probably already work with the pod natively. I can build off the existing 1385 layout, changing on the chip field and support components, meaning design time will take about 1 day total. That leaves a lot of time for BF16 work.

So, who would be dreadfully upset if I rolled the 1385 pod back to 1384? Since most folks didn't even know I was working on a 1385 pod until a few days ago I'm guessing it's probably okay.

Got a new 28-135GH stick miner!
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Server PSU interface boards and cables. USB and small-scale miners. Hardware hosting, advice and odd-jobs. Supporting the home miner community since 2013 - http://www.gekkoscience.com
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December 15, 2016, 03:25:59 AM
 #416

If the roll back of the BM1385 to BM1384 give more time for BF16 Im all for it  Grin

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December 15, 2016, 03:28:59 AM
 #417

And this is why I don't take in money for products that haven't been successfully prototyped yet, because things can change.

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December 15, 2016, 03:32:44 AM
 #418

makes sense to utilize just two types of chips (old and new), this way it is more streamlined, I agree.
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December 15, 2016, 03:40:30 AM
 #419

Yeah, I'm kicking myself for deciding to pod with BM1385. I made that choice something like 3 weeks ago. If I'd stuck with 1384 I could have that pod PCB on the way alongside the 2Pac and be testing everything all at once. And not have wasted money on pod PCBs for an unused design. Oh well, get to it when I get to it.

Got a new 28-135GH stick miner!
Currently in development - 100+GH USB stick; 800GH 60W pod; 6TH volt-adjustable S1/3/5 upgrade kit
Server PSU interface boards and cables. USB and small-scale miners. Hardware hosting, advice and odd-jobs. Supporting the home miner community since 2013 - http://www.gekkoscience.com
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December 15, 2016, 04:34:17 AM
 #420

Yeah, I'm kicking myself for deciding to pod with BM1385. I made that choice something like 3 weeks ago. If I'd stuck with 1384 I could have that pod PCB on the way alongside the 2Pac and be testing everything all at once. And not have wasted money on pod PCBs for an unused design. Oh well, get to it when I get to it.

if you already have the pod pcbs why dont you just make a limited run and use them? then make both 1384 and 1385?
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