Topic: Community Miner Design Discussion - page 15. (Read 34221 times)

  84 dollars for 1000   is 17 cents a board  not bad. 

send out with 25 amp fuse and  an option for 30  amp fuse upgrade for overclocking.

16 dollars is CRAZY BLOODY EXPENSIVE for a fuse socket/holder.
 Should be able to get a 20-30 amp CIRCUIT BREAKER for not a heck of a lot more than that.

 
 MUCH more like it!

Amps should be 30 not 20.

Stock 25 amp,fuse with 30 amp,fuse as the over clock option.

This would allow 270 to 325 watts per board on max .

Maybe 2.2th to 2.4th max more like

2th.   If you do 2 boards per s-1 shell maybe 4th pulling 440watts.

A lot nicer then the s7 pulling 1449 watts.

Buysolar and I have quite a bit of s-3 and s-1 waiting for bitfury boards.

-removed for privacy-

Nah. Fuses cost money. Just make a jumper and let the PSU or wiring between it and the load be the limiter...

edit: Hmmm, along those lines, has anyone looked to see if the IBM PSU's have an internal adjustment to set the OC limit?

That is also a troubleshooting technique called "smoke testing".
Put in too large of a fuse and see what smokes.
Then replace it.

If the larger fuse still blows, replace with larger fuse and repeat.

 

no voltage or amperage ratings that I can see.

This one looks beautiful http://www.digikey.com/product-detail/en/mpd-memory-protection-devices/BK-6010/BK-6010-ND/2330529

Nice put in a 25 amp blade and safety all around.

Yeah I know the tweakers will want to put in a 30 amp blade but still make spec with that socket.

pcb mount sockets for ATC/ATO blade fuses, good for 30A http://www.digikey.com/product-detail/en/keystone-electronics/3522/36-3522-ND/228600
General blade fuse clips search there http://www.digikey.com/product-search/en/circuit-protection/fuseholders/655422?k=blade+fuse+holder&pv47=22872&FV=fff4000a%2Cfff8003e&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

The old Bitfury boards used em way back when they needed us to start their farms for them 

This could be a candidate, trouble is they don't specify the rating of the socket.

Nice power supply, same 24Volts PS we have used for dimmable LED powering in our metalworks repairshop)
ready for upgrading my S5s with Bitfury hashboards, just let me know if you will need testing field))

 Not sure I've ever seen an automotive blade-type fuse mount for a circuit board, but they DO make sense and should be cheap if they exist, and the fuses themselves are quite common in many ratings (specifically including 20 and 30 amp).


 The older cartridge-style fuses come in plenty of amperage and are reliable, but they do tend to be harder to find and more expensive nowadays.

less than 500w per tera is really a great result, i cna even begin to mine again bitcoin directly with that ratio

i hope this time they do not make huge miners with 10 tera and kill the casual mining with 3kw at home

I work in an autoparts store and we have blade fuses that "glow" when they "Blow"...twice the price of a regular one but still neat feature - a finishing type touch.

Yeah fused with correct sockets and as a point of interest on the 15.5 volt psu / power as a max.

I need to check on some mean well psu's

I have some really good no fan hi eff ones in mind. -----------  sometimes they are cheap on ebay

12 volt

15 volt

18 volt

24 volt

Let me find PDFs on them.  the fan on the s-1 or the s-3 can point at the psu and help to cool the psu at zero power cost.


https://www.trcelectronics.com/ecomm/pdf/hlg240h.pdf

  does up to 240 watts if you use the 24 volt one 92.5%  eff
  does up to 240 watts if you use the 20 volt one  91.5% eff

  does up to 225 watts if you use the 15 volt one  90.0% eff
  does  up   192 watts  if you use the 12 volt one 90.0%  eff ------ I  found this one for 35 usd on ebay


-----------------------------------------------------------------------------------------

https://www.trcelectronics.com/ecomm/pdf/hlg320h.pdf

does up to 320 watts if you use the 24 volt one 94.0% eff
does up to 300 watts if you use the 20 volt one  93.5% eff

does up to 285 watts if you use the 15 volt one 92.5% eff
does up to 264 watts if you use the 12 volt one 91% eff

------------------------------------------------------------------------------------------
Top of the line model

https://www.trcelectronics.com/ecomm/pdf/hlg600h.pdf

does up to 600 watts if you use the 24 volt one 95.0% eff
does up to 560 watts if you use the 20 volt one 94.5% eff

does up to 540 watt if you use the 15volt one  93.5% eff
does up to 480 watts if you use the 12 volts one 92.0 % eff

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looks to me if I run 1 blade with my model  psu  and provide it with 150 watts of its rated 192  

   I could have a very quiet office model doing about 1.5 th

I have a down clocked s-7 running at my friends office.

Maybe I could get some bitfury running in his spot and move the s-7 to the solar array


 reason being the solar array can run loud.

And hopefully a socket that's actually rated for that kind of current, and blades on the fuse that are rated for it also, not like the AM Cube. The AM Blade had socketed fuses on some of 'em, which was handy since fuses blew on those more often than there was good hardware-failure-related reason for it (and the soldered-on ones were difficult to replace). But I wouldn't have run 8-10A through one of those little sockets. My board needs to be good for at least 20A, probably 25A just in case of crazy people. Automotive fuses make perfect sense for a 12V 25A load. Hopefully a 30A-rated board-mount socket won't be too hard to find.

I agree fusing is a good idea. Definitely go for automotive blade style vs the cartridge fuses. They have currents up to 120A. Far more reliable and smaller as well. Wikipedia has surprising good ref on them. https://en.wikipedia.org/wiki/Fuse_%28automotive%29

The buck chip I'm looking at, and the main FETs, are all rated for much higher than 15.5VDC. I'd just have to make sure the input caps and any accessory LDOs and such are rated for it too. Shouldn't be a problem. The main buck chip also has a UVLO input I can set to any voltage I want. So that's probably all doable, and fits in line with capabilities Novak and I were wanting in there anyways. I was gonna guarantee at least 14.4V operation, so 15.5V isn't too much farther. Fused input is a decent idea also, but I'd probably put a fuse such that the maximum expected buck output at the minimum expected input voltage doesn't blow it. Could prevent a fire or other damage in case something goes wrong, and I think a lot of miner hardware could benefit from that sort of protection.