GekkoScience BM1384 Project Development Discussion

[TheRealSteve]

changing the VID/PID on them things shouldn't be hard to do, to be USB compliant, you may want to register it?

A proper VID registration is not chump change.  For something with such a small run, mainly used by techy people, and presuming they don't necessarily want to put a USB logo on the product.. it's just not worth it.  Thus my earlier suggestion of instead getting a PID from a PID vendor, or using the VID of a defunct company.  Plenty of articles on the internet about the pros/cons of doing so in terms of potential technical issues, whether or not entities have a right to sell the PIDs they do, and legal considerations.

if you are using them cp2*** chips, please use ESD protection on it  [...] if not you could move onto the more bells and whistles, yet more expensive, "FT232R"? and call it a day?

While ESD diodes on the CP2102 inputs is nice (AntMiner U1/U2, bi•fury use 'm), I've not had any on other products that didn't have them fail.  But that's anecdotal and there's plenty others who do swear there's issues.  If an alternative were to be chosen, though, FTDI wouldn't really be my first choice for the same reason that Prolific wouldn't be my first choice.  There's always MCP and wCH.  If anything, I'd use a CP2103 and make use of the 4xGPIO.. but that doesn't negate ESD concerns

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[AJRGale]

changing the VID/PID on them things shouldn't be hard to do, to be USB compliant, you may want to register it?

A proper VID registration is not chump change.  For something with such a small run, mainly used by techy people, and presuming they don't necessarily want to put a USB logo on the product.. it's just not worth it.  Thus my earlier suggestion of instead getting a PID from a PID vendor, or using the VID of a defunct company.  Plenty of articles on the internet about the pros/cons of doing so in terms of potential technical issues, whether or not entities have a right to sell the PIDs they do, and legal considerations.

Eh, i didn't see the costs, yeah, ignore my statement..

if you are using them cp2*** chips, please use ESD protection on it  [...] if not you could move onto the more bells and whistles, yet more expensive, "FT232R"? and call it a day?

While ESD diodes on the CP2102 inputs is nice (AntMiner U1/U2, bi•fury use 'm), I've not had any on other products that didn't have them fail.  But that's anecdotal and there's plenty others who do swear there's issues.  If an alternative were to be chosen, though, FTDI wouldn't really be my first choice for the same reason that Prolific wouldn't be my first choice.  There's always MCP and wCH.  If anything, I'd use a CP2103 and make use of the 4xGPIO.. but that doesn't negate ESD concerns

well you should know my religious stance on esd protection now, ive said it enough times..

[philipma1957]

changing the VID/PID on them things shouldn't be hard to do, to be USB compliant, you may want to register it?

A proper VID registration is not chump change.  For something with such a small run, mainly used by techy people, and presuming they don't necessarily want to put a USB logo on the product.. it's just not worth it.  Thus my earlier suggestion of instead getting a PID from a PID vendor, or using the VID of a defunct company.  Plenty of articles on the internet about the pros/cons of doing so in terms of potential technical issues, whether or not entities have a right to sell the PIDs they do, and legal considerations.

Eh, i didn't see the costs, yeah, ignore my statement..

if you are using them cp2*** chips, please use ESD protection on it  [...] if not you could move onto the more bells and whistles, yet more expensive, "FT232R"? and call it a day?

While ESD diodes on the CP2102 inputs is nice (AntMiner U1/U2, bi•fury use 'm), I've not had any on other products that didn't have them fail.  But that's anecdotal and there's plenty others who do swear there's issues.  If an alternative were to be chosen, though, FTDI wouldn't really be my first choice for the same reason that Prolific wouldn't be my first choice.  There's always MCP and wCH.  If anything, I'd use a CP2103 and make use of the 4xGPIO.. but that doesn't negate ESD concerns

well you should know my religious stance on esd protection now, ive said it enough times..

I get a lot of ESD issues in my home in the winter (forced air heat)    I have shocked Antminer U1/U2 and ice furies more then one time.

I had over 300 U1/U2 sticks in house and was running up to 130 of them at one time.  I killed two or three with direct ESD to a stick.  But most of the time (more then 25 times_ they survived the ESD.  So I would rate the protection on them as decent.

[sidehack]

Also, point of interest. The temporarily-applied heatsink (rubber bands) on my test stick halfway came off sometime in the last 21 hours of running at 150MHz in my 80+F shop. It was tilted over so the shim was basically only contacting one edge of the chip - not a face, just the corner edge. The current was up to 600mA (from 570) and the heatsink and PCB were pretty darn toasty but cgminer reported zero HW in that time. I'm okay with that. So this guy has been running at ~610mV 150MHz drawing 4.94V/570-600mA with 168K accepted shares and zero HW for a shade over 24 hours.

Good enough for me. I think I'll build a few more today.

Also, on my U2 I can see a couple unpopulated pads on the USB signal lines that I assume are AJRGale's ESD protection. I do not have it on the Compac, but if it becomes a problem and we run a second batch I'll look into adding that.

[sidehack]

I built me 8 sticks today, and most of 'em appear to work. One of them won't start at 150MHz until it's cranked to something like 650mV (instead of 615) so I don't know about that guy. One of 'em is just straight-up misbehaving (chip issues maybe), but the rest seem to work. I have four right now running off a Pi and I'll see tomorrow how they look.

One of the eight sample heatsinks is misdrilled. Not too impressed with those odds.

[valkir]

Nice! Cant wait to see them and to get mine! 

[philipma1957]

I built me 8 sticks today, and most of 'em appear to work. One of them won't start at 150MHz until it's cranked to something like 650mV (instead of 615) so I don't know about that guy. One of 'em is just straight-up misbehaving (chip issues maybe), but the rest seem to work. I have four right now running off a Pi and I'll see tomorrow how they look.

One of the eight sample heatsinks is misdrilled. Not too impressed with those odds.

are they at the burger address?


http://eligius.st/~wizkid057/newstats/userstats.php/1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr


 I found it do I  guess test address is different this time.

[sidehack]

Naw, I was in a bit of a hurry to finish up and still get to the post office on time (unfortunately I arrived seconds after closing time) and I think the config defaulted to the BEUSB address on BTCDig that TheRealSteve set up for the erupter contest. I haven't bothered to make an account there but it's handy for testing since the vardiff starts at 2 instead of 128.

If the shop VPN hadn't gotten hosed in a storm-related router crash last week (and I haven't fixed that part of the config yet, whoops) I could log in and change it. But I didn't. Oh well. Maybe tomorrow I'll figure out the issues with the other sticks, hook the hub up to a beefier 5V supply and run all 8 together over the weekend at the 1BURGER address. That'd be 66GH. It's fun to think I could push these to 11GH off about 3.6W, when an AM Blade was top of the line gear just two years ago and took 24 times that power to do slightly less work.

Think I should push them at all? If I can keep 'em cool at 225MHz (what, about 4.5W each?) that's right at 100GH which was a loaded Blade backplane, and even counting the power taken by the fan and the Pi this would still come in at half the draw of a single Blade. Hooray technology!

[AJRGale]

Naw, I was in a bit of a hurry to finish up and still get to the post office on time (unfortunately I arrived seconds after closing time) and I think the config defaulted to the BEUSB address on BTCDig that TheRealSteve set up for the erupter contest. I haven't bothered to make an account there but it's handy for testing since the vardiff starts at 2 instead of 128.

If the shop VPN hadn't gotten hosed in a storm-related router crash last week (and I haven't fixed that part of the config yet, whoops) I could log in and change it. But I didn't. Oh well. Maybe tomorrow I'll figure out the issues with the other sticks, hook the hub up to a beefier 5V supply and run all 8 together over the weekend at the 1BURGER address. That'd be 66GH. It's fun to think I could push these to 11GH off about 3.6W, when an AM Blade was top of the line gear just two years ago and took 24 times that power to do slightly less work.

Think I should push them at all? If I can keep 'em cool at 225MHz (what, about 4.5W each?) that's right at 100GH which was a loaded Blade backplane, and even counting the power taken by the fan and the Pi this would still come in at half the draw of a single Blade. Hooray technology!

then good old 500W foot heaters.. i was half tempted to buy an old set of them, someone here in aus is selling them for $100ish for 10 blades, and they a shat on by 8 little hand made sticks!

i better keep working on my quantum entangle light based ALU

[TheRealSteve]

I think the config defaulted to the BEUSB address on BTCDig that TheRealSteve set up for the erupter contest. I haven't bothered to make an account there but it's handy for testing since the vardiff starts at 2 instead of 128.

Too bad it's one of the few pools that'll even go that low, at least reliably

That pool has a semi-public output of hash rates, but no fancy public graphs, but this graph off the account page should all be GekkoScience testing anyway:

[philipma1957]

I think the config defaulted to the BEUSB address on BTCDig that TheRealSteve set up for the erupter contest. I haven't bothered to make an account there but it's handy for testing since the vardiff starts at 2 instead of 128.

Too bad it's one of the few pools that'll even go that low, at least reliably

That pool has a semi-public output of hash rates, but no fancy public graphs, but this graph off the account page should all be GekkoScience testing anyway:

thanks for info and charts.

[philipma1957]

Naw, I was in a bit of a hurry to finish up and still get to the post office on time (unfortunately I arrived seconds after closing time) and I think the config defaulted to the BEUSB address on BTCDig that TheRealSteve set up for the erupter contest. I haven't bothered to make an account there but it's handy for testing since the vardiff starts at 2 instead of 128.

If the shop VPN hadn't gotten hosed in a storm-related router crash last week (and I haven't fixed that part of the config yet, whoops) I could log in and change it. But I didn't. Oh well. Maybe tomorrow I'll figure out the issues with the other sticks, hook the hub up to a beefier 5V supply and run all 8 together over the weekend at the 1BURGER address. That'd be 66GH. It's fun to think I could push these to 11GH off about 3.6W, when an AM Blade was top of the line gear just two years ago and took 24 times that power to do slightly less work.

Think I should push them at all? If I can keep 'em cool at 225MHz (what, about 4.5W each?) that's right at 100GH which was a loaded Blade backplane, and even counting the power taken by the fan and the Pi this would still come in at half the draw of a single Blade. Hooray technology!

 my 1 stick at 225Mhz with fans is a bit warm.  but I have been running it steady at 218.75 with the fan in an 80- 90 f garage.

I would think running them at freq 218.75  will give you about 94-96gh and if you use fans they will not over heat.

[sidehack]

That chart's not too encouraging. Looks like the setup dropped out shortly after I fired it up. I wonder if it was the hub, the Pi or the power.

[Ikron]

The pi was infamous for its lousy usb reliability. I wouldn't be surprised if that is still the case.

[cavaliersrus]

my b+ 512 is still running strong from last time i was there sidehack

digging the updates on the miners your working on

[philipma1957]

may be his hub.  he had 8 sticks pulling 4 watts each.  I know he has a rebuilt custom hub it may have given up the ghost.

Anyone that  ran a ton of sticks knows hubs can stress out when you get to the top end of the hub.

[sidehack]

No, that was just the four sticks at 150MHz. Looks like the Pi reset itself sometime, because when I came in this morning my terminals were logged out but the hardware was up and running. Restarted cgminer and I've been working on figuring out problem sticks all morning.

The one that was drawing too much power, I swapped the chip and now it's working fine (starts at 150MHz at 615mV like it should, instead of 660). The other one that wasn't lighting up at all, well I swapped its chip and reseated a couple times and finally gave up and stole its parts to make a new stick. And then that one didn't work either. And then I realized the reset wasn't connected on the first board and I guaran-darn-tee it that was the problem. It's only about the third time I haven't noticed exactly that problem before. So now I have two sticks which almost work and hopefully they'll be functional within the hour. That'll actually give me 10 sticks since I have two prototypes still, which I can run at 200MHz and bust out 110GH off what, 45W with a fan? It's cool, I know you're jealous.

[valkir]

110gh 45w where to I sign! 

[Mikestang]

Yea, that's very impressive!  So long, Antminer U3, hello GekkoScience!

Plus how cool will it be when we're running gear built by those in our community and not some overseas corporation?!

[WBF1]

Yea, that's very impressive!  So long, Antminer U3, hello GekkoScience!

Plus how cool will it be when we're running gear built by those in our community and not some overseas corporation?!

On that note, is there any plan (even a twinkle in the eye) for some form factor here along the lines of a U3 or R-Box?