[time-nuts] RPi/ beagle bone-like computer without video

Scott Stobbe scott.j.stobbe at gmail.com
Wed Nov 30 22:58:07 EST 2016


Having a full blown os is nice when all the processor is responsible for is
house keeping and storage. You also get plenty of RAM for buffering prior
to writing to persistent storage, like an SD card. That said I have found
SD cards to be fusy, at least the microchip FAT libraries. And write cycle
times are random sometimes being 0.5 seconds, which means you need to be
able to allocate memory the equivalent of a few seconds worth of data for
buffering (not an issue on linux systems).

On Wed, Nov 30, 2016 at 10:05 PM, Graham / KE9H <ke9h.graham at gmail.com>
wrote:

> If you are going to go battery powered, I would also recommend staying away
> from Linux, go with something like a 32 bit PIC32MX or PIC32MZ.  Full
> Ethernet stack, RTOS if you need it, can do deep sleep down into the
> microamp range when not active.
>
> --- Graham.
>
> On Wed, Nov 30, 2016 at 8:35 PM, Gary Chatters <
> gcarlistaa at garychatters.com>
> wrote:
>
> > There do seem to be a lot of small SBCs out there.  I have used boards
> from
> > Technologic Systems, http://www.embeddedarm.com
> > and EMAC, Inc, http://www.emacinc.com
> >
> > They have numerous models for you to look though.  Some various features:
> > - SBC or SoM/CoM on baseboard
> > - Various form factors including PC/104
> > - Usually with RS-232, USB, GPIO, Ethernet.
> > - Many without video.
> > - ARM processor
> > - Many with industrial temperature range
> > - Linux and development environment provided (may not be latest)
> > - Lower power then BBB.  One model runs at 0.5 watts.  Many around 1.
> >
> > Prices generally 2 or 3 x BBB prices.
> >
> > Gary
> >
> > On 11/30/2016 03:42 PM, jimlux wrote:
> >
> >> I'm looking for a small linux single board - similar to RPi or
> >> Beaglebone Black, but don't need the HDMI, or video stuff.
> >> Preferably without weird connectors, and available for wide temperature
> >> ranges (it's for a data logger/collector in the field)
> >>
> >> What's out there?
> >>
> >> There's BBB in industrial flavor (-40 to +85C ) for $60-70
> >>
> >
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