that is . .. it would cost us 4-5x as much to make our own BBB's . . On Mon, May 16, 2016 at 4:44 PM, William Hermans <[email protected]> wrote:
> Also, while on the subject. It's kind of hard to understand how the rpi > foundation can create their rpi line at so little cost. My buddy and I ( > mostly my buddy ) priced out what it would cost to make a beaglebone, and > for us, it would cost 4-5 as much as what they're sold for retail. > > Quite honestly, the first iteration of the rpi I found rather repugnant. > But now owning an rpi3 I see it is really a good little board that has > limited uses in the embedded arena( true embedded, not just small cheap > systems connected to 3 GPIO's ) > > But see, the Raspberry PI3 has quad cores, a really good GPU( which is > where is shines ) 1G memory, ethernet, 40 or so pins for GPIO . > peripherals, wifi, and BLE all for $35 . . . Honestly I do not see them > making any money except from their government, from loses. > > So even though I think the rpi3 is a really good deal, and a steal at > $35USD, I still think the BBB is the better deal, even at a higher cost. > For many situations. But how in the hell does the rpi foundation do it ? > heh. > > On Mon, May 16, 2016 at 4:37 PM, Gerald Coley <[email protected]> > wrote: > >> I design systems like this all the time for our customers. They are nice >> enough to give me a bigger budget and not worried about keeping it low cost >> just to sell more boards. >> >> Gerald >> >> >> On Mon, May 16, 2016 at 6:34 PM, William Hermans <[email protected]> >> wrote: >> >>> *The bottom line seems to be that the BBB was not designed for this* >>>> * kind of situation or application, and making it fit this requires* >>>> * additional resources of some sort. Now the question comes down to* >>>> * cost, utility, percentage of applications needing this, elegance of* >>>> * design, and whether or not the hardware platform can cooperate in >>>> this* >>>> * or whether or not it simply lives in its own world.* >>>> >>>> >>>> * Harvey* >>>> >>> >>> I think the real bottom line is that the BBB *could* have been designed >>> to do all this and more. At additional costs. As Gerald has stated many >>> times on this group. Which I can completely understand. >>> >>> >>> >>> >>> On Mon, May 16, 2016 at 4:28 PM, Harvey White <[email protected]> >>> wrote: >>> >>>> On Mon, 16 May 2016 15:45:14 -0700, you wrote: >>>> >>>> >You do not need anything connected to the beaglebone for any reason. >>>> The >>>> >beaglebone has an on die ADC that can detect if the AC mains is >>>> powered or >>>> >not. In which case, after a preset time period the Beaglebone could >>>> shut >>>> >its self down. >>>> >>>> True enough. The prevailing wisdom was going with an external device >>>> having all the smarts about power failure, while the BBB was being >>>> held up by batteries. >>>> >>>> The requirement that you propose is that the BBB have, somewhere, >>>> access to power long enough to do a graceful shutdown. >>>> >>>> How this is done is left as an exercise for the student. >>>> >>>> >>>> > >>>> >Meanwhile, an external "device" can just switch off the input 5V to the >>>> >beaglebone after a preset amount of time. Then once you have AC power >>>> back, >>>> >the "Device" simply turns the 5V back on. >>>> >>>> Yep, and with the same requirements of powering from either a battery, >>>> a supercapacitor, or something more exotic. >>>> >>>> The bottom line seems to be that the BBB was not designed for this >>>> kind of situation or application, and making it fit this requires >>>> additional resources of some sort. Now the question comes down to >>>> cost, utility, percentage of applications needing this, elegance of >>>> design, and whether or not the hardware platform can cooperate in this >>>> or whether or not it simply lives in its own world. >>>> >>>> >>>> Harvey >>>> >>>> >>>> > >>>> >On Mon, May 16, 2016 at 3:09 PM, Harvey White <[email protected]> >>>> >wrote: >>>> > >>>> >> On Mon, 16 May 2016 11:35:54 -0700 (PDT), you wrote: >>>> >> >>>> >> >Looks like nut been ported to Debian for the BBB. >>>> >> > >>>> >> >It and a smart UPS might be the easiest solution. >>>> >> > >>>> >> >I'm thinking along these lines, but haven't done anything with it >>>> yet. >>>> >> The >>>> >> >nut client getting a signal over the network from my desktop is >>>> kind of >>>> >> >what I'm thinking. I've my BBW IOT app, router, and ISP interface >>>> on >>>> >> >a separate UPS that I want running as long as the battery lasts, >>>> but a >>>> >> >controlled shutdown of the BBW is something I'd like to add >>>> eventually. >>>> >> > >>>> >> >The "shutdown if the power outage lasts longer than X" is pretty >>>> easy, >>>> >> >robust automatic start-up when the power returns might require a >>>> smarter >>>> >> >than the average UPS. >>>> >> >>>> >> I'd say that you want one that does automatic battery tests as well. >>>> >> The one that I knew of at one time was a sine wave inverter. >>>> >> >>>> >> To summarize the types of inverters, there are two schemes. >>>> >> >>>> >> 1) keep a battery charged at all times. When power fails, detect the >>>> >> loss of AC at the output. Start the inverter and switch that power >>>> to >>>> >> the output of the inverter. What happens is that power drops out for >>>> >> the output with a power failure, and your equipment is supposed to >>>> >> stay "up" for a certain amount of time (that the UPS takes to switch >>>> >> on). Then the UPS takes up the load and life is good. >>>> >> >>>> >> 2) keep a battery charged at all times. Power the inverter from the >>>> >> battery at all times. When the power fails, the battery charger >>>> >> simply shuts down. >>>> >> >>>> >> The second one is the one I'd think you'd want to get. >>>> >> >>>> >> An opto isolator, driven by an AC bridge (or an AC style >>>> optoisolator) >>>> >> would give you a power failure indication within a half cycle. >>>> >> >>>> >> Harvey >>>> >> >>>> >> >>>> >> > >>>> >> >I'd be interested in success stories, but my experience with brand >>>> name >>>> >> >(APC) and off-brand UPS with desktop system is while they are >>>> better than >>>> >> >nothing, they aren't good at reporting battery issues and >>>> ultimately I >>>> >> end >>>> >> >up with a power failure and "pull the plug" type shutdown because >>>> the UPS >>>> >> >batteries can't support the switch over. We get a lot of 0.5 - 15 >>>> minute >>>> >> >power failures from thunderstorms here, so I'm sure the USP has >>>> saved me, >>>> >> >but they are not foolproof. >>>> >> > >>>> >> > >>>> >> >Ultimately I'm trying to sell the wife on a "whole house" natural >>>> gas >>>> >> >powered backup system so that a dumb UPS or battery with only a few >>>> >> minutes >>>> >> >run time to let the generator come on and switch over would be >>>> needed. >>>> >> >She was excited about it after Hurricane Ike, but now that its been >>>> ~eight >>>> >> >years, selective memory has her thinking we don't need it. >>>> >> >>>> >> -- >>>> >> 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 [email protected]. >>>> >> To view this discussion on the web visit >>>> >> >>>> https://groups.google.com/d/msgid/beagleboard/apfkjbtvsk9h94q0qvfpke40ofhbc7c22h%404ax.com >>>> >> . >>>> >> 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 [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/silkjbt8elht0qlo1536jduujmhaekcobc%404ax.com >>>> . >>>> 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 [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/CALHSORr8pWh47wzyi-jd_4U13X%2BfEDBj_r9Cf6Ao205AjYrX%2Bg%40mail.gmail.com >>> <https://groups.google.com/d/msgid/beagleboard/CALHSORr8pWh47wzyi-jd_4U13X%2BfEDBj_r9Cf6Ao205AjYrX%2Bg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Gerald >> >> [email protected] >> http://beagleboard.org/ >> [email protected] >> >> -- >> 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 [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/CAHK_S%2BdzeQ3T_QDcThddEnaoVqzU9PiDCS1ncVFbd0qfsDyzXA%40mail.gmail.com >> <https://groups.google.com/d/msgid/beagleboard/CAHK_S%2BdzeQ3T_QDcThddEnaoVqzU9PiDCS1ncVFbd0qfsDyzXA%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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORqM2ZeUOdjgDwzN8imUGMh6y3ucPUmtQbYQMqJZ39ZEzA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
