Mubin, how many kiosks do you plan to assemble? 13 Апр 2014 г. 1:55 пользователь "Mübin İçyer" <[email protected]> написал:
> Thanks for replies. I have read somewhere ( > http://www.daveakerman.com/?page_id=1294) that the GPU of RPi can be > deactivated but it saves only 20mA of power, which is not a big deal. Our > system will consist of some other hardwares as well i.e. solar power > control, RFID reader, CAN bus connection, 3G or GPRS connection, LCD, > Keyboard etc. We decided to get a BBB as soon as possible :) > > > > 2014-04-12 23:31 GMT+02:00 William Hermans <[email protected]>: > >> According to what I have read you can not disable the GPU on the rPI, but >> you can minimize how much RAM it uses ( down to around 16MB it seems ) I >> would however wager if you're not using the GPU, its power signature would >> be minimal. >> >> rPI A seems to use up to around 300mA( but no onboard networking ), while >> the rPI B can use up to around 700mA. >> >> I can vouch that the BBB can run from a computers USB port, so less than >> 500mA. Running from USB, I have boot from an external USB drive, with >> ethernet enabled., while loading the CPU at 99% load ( software test I >> wrote in C ) Minimal to no GPIO running. Aside from this however, I have >> not checked to see how much power the BBB draws. But I did run the above >> test for several hours. I meant to stress the board for the sole purpose of >> determining stability. It did not crash or glitch once. >> >> From all the reading I have done the only real advantage the rPI has over >> the BBB, is a much stronger GPU. Power usage seems to be reasonably >> comparable where I'd bet the BBB has the overall advantage ( no hand on >> proof though ). Also, the rPI has the slight advantage of software maturity >> . . . But personally I like where the BBB sits software wise right now. >> >> I have no love for the rPI personally, but I could see your project >> working on either. One thing to note however. If you're going to be running >> solar to charge batteries . . .the BBB has the right peripherals and enough >> of them to act as a charge controller( with proper isolation and power >> mosfets of course ) . . . with plenty to spare. Something that is rather >> trivial to implement in C. >> >> >> On Sat, Apr 12, 2014 at 1:28 PM, Charles Steinkuehler < >> [email protected]> wrote: >> >>> I think the BBB is the better choice as well, but you'll likely want to >>> measure real-world power consumption. >>> >>> Neither board is really designed as a mobile platform, but the Pi is at >>> heart a set-top box (powered by AC), while the BeagleBone has it's roots >>> in tablet-like processors and has fine-grained control over powering >>> up/down different parts of the chip, CPU speed, etc. I'm not sure on >>> the Pi if you can disable it's probably power-hungry GPU that is >>> actually in control of the system (the ARM core is actually a secondary >>> CPU, the black-box GPU runs the show). >>> >>> There are also likely some tweaks to be made with the BBB that will >>> reduce power consumption, specifically putting the HDMI Tx chip in a >>> power-down state. The on-board eMMC will also probably help with power >>> consumption, or at least help a bit with reliability (no uSD connector >>> to cause problems). >>> >>> Finally, the BBB is actually engineered to be able to run off battery, >>> which is very similar to what you want to do, while I don't know if the >>> Pi has a means to work with multiple power sources. >>> >>> Anyway, best of luck, and ask here if you go with the 'Bone and run into >>> any problems! >>> >>> On 4/12/2014 3:05 PM, Philip Polstra wrote: >>> > BBB is a clear winner. Lower power consumption, more I/O, easier to do >>> > CAN, more reliable, more software options. >>> > On Apr 12, 2014 2:05 PM, "Mübin Icyer" <[email protected]> wrote: >>> > >>> >> Hi, >>> >> >>> >> We are a gruop of students who want to make a kiosk system with >>> embedded >>> >> linux boards. We are now in selection phase but we could not decide >>> which >>> >> one fits to our requirements. Could you please help us? >>> >> >>> >> Our requirements: >>> >> >>> >> - Minimum power consumption, since the kiosk will be powered with >>> >> solar power and battery. >>> >> - CAN interface is a must, Rasperry Pi doesn't have such an >>> interface >>> >> but it can be easily makeable at cost of power consumption (a >>> seperate >>> >> converter for CAN to uart or i2c will be needed.) >>> >> - No need for graphical outputs such as HDMI, Video out or so. The >>> >> connection to the board will be over SSH. >>> >> - The grapics and text will be displayed on an monochrome LCD or >>> >> e-paper to reduce the power consumption. >>> >> >>> >> Thanks for helps. >>> >> >>> >> -- >>> >> 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]. >>> >> For more options, visit https://groups.google.com/d/optout. >>> >> >>> > >>> >>> >>> -- >>> Charles Steinkuehler >>> [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]. >>> 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 a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/KCr_Sm8tP_o/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> 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]. > 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]. For more options, visit https://groups.google.com/d/optout.
