I understand that. I'm just trying to work through the issues we're seeing, and find a way forward for us. It's a trial-and-error process. I chose the BBB initially because it's a great design that meets a lot of our needs, known and potential. To go with another design would likely involve compromises for us.
I could provide more details, though I'd prefer not to do so in a public forum. I would also need to talk to my management about confidentiality and stuff. If you are open to a (hopefully brief) offline conversation, that would be ideal. I appreciate any help you can give. On Thu, Jul 14, 2016 at 5:04 PM Gerald Coley <ger...@beagleboard.org> wrote: > At this point all I can say is that I did not design these boards for your > application and therefore I cannot guarantee that it will do what you need > it to do. > > From what little you have said about your application, it sounds like > industrial versions would be preferable. > > I would need to see a detailed schematic of your design to see if there > were any issues in your application and use of the board as designed.. > > There can be a variance across different boards depending on what corner > cases you might be hitting. It could be the ones that are working fine are > working better than they should be as opposed to the ones that fail not > working as good as they should be. > > Gerald > > > On Thu, Jul 14, 2016 at 4:40 PM, John Stoner <j...@forelight.com> wrote: > >> In our lab we have 8-9 Beaglebone Black units. We are using them to >> control high intensity lights, with circuits in the 7A/9V neighborhood. The >> circuits are simple, using mosfets to control the high power circuits. >> There is water in our environment but we protect our electronics pretty >> well, through both design and procedure. It's warm (~80F) but not >> particularly humid. We haven't really measured the humidity but I'm >> reasonably comfortable here. >> >> We've had three of our boards fail in different ways: >> >> One is an element14 board that boots ok, but reproducibly gives a >> mysterious error on install from source of Python 2.7.11 (a requirement for >> us, long ugly story). I've tried to reflash with an SD card and it seems >> unresponsive whether I hold down the S2 button or not. Damaged SD card >> socket? Linux does see the SD card's filesystem. It just refuses to boot >> from it. Maybe a damaged S2 button? >> >> Another element14 one seems to overheat. With an IR camera, we've seen >> the power regulator spike over 60C. It has frozen up on us a couple times >> if we let it run--lights stop blinking, network goes unresponsive, but does >> not appear to power off. >> >> Another has a Beaglebone logo with the text ''beagleboard.org' >> silkscreened on it (CircuitCo? It's close but not identical to the logo I >> see on their board on Adafruit). It shut down mysteriously. W have rebooted >> a couple times since and seen diminishing uptimes. Most recently it didn't >> finish rebooting at all. >> >> The rest seem to run OK. We have had other failures related to other >> electronics. These ones seem hardware related, within the BBB. These have >> all been bought in 2016, I think. We've bought them through Adafruit and >> Amazon when they were out of stock. >> >> A few questions come to mind: >> >> 1. we are looking at scaling up at some point. 35%-ish failure rates for >> microcontrollers over six months are not going to work for us in the long >> term. *Is this normal for Beaglebone Blacks?* We already handle these >> units pretty carefully. Maybe we could do more, though it's hard to say >> what. If we can't get it under control we might want to find another board >> to standardize on. The BBB has a lot of features we need--we'd prefer not >> to leave it if possible. >> >> 2. The industrial BBBs seem to address higher temperature, though we >> don't expose ours to extremes of temperature (that they don't generate on >> their own anyway). *Might the higher quality parts provide higher >> reliability in general?* >> >> 3. *Also, could we expect better customer service with industrial BBBs? * >> >> 4. *What could we expect in general with industrial units?* >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> > You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. > > >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/f8142c48-dc50-4ea9-9fab-2e3ea0ef10dd%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/f8142c48-dc50-4ea9-9fab-2e3ea0ef10dd%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Gerald > > ger...@beagleboard.org > http://beagleboard.org/ > gcol...@emprodesign.com > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/hA3QXUHhj_0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAHK_S%2BfJZC44PfPO9JLY4DHL_Sh_JoiiqMzzzwBOMqkYaMSnUg%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAHK_S%2BfJZC44PfPO9JLY4DHL_Sh_JoiiqMzzzwBOMqkYaMSnUg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAFEygjrbxMWUnxaAq%3D5pUOQo_pzoZh1q-0Gw%3DnY_TYh2i-zKTw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
