On 01/05/18 17:59, Stuart Henderson wrote:
> If you go down this route, see if the PCEngines APU2 is a good fit
> for your needs. There are other industrial-type systems but in this case
> many developers have the exact same device, so a lot more people are
> invested in fixing problems found with it. Low cost but it's a nicely
> made board and I always like supporting companies who publish things
> like https://www.pcengines.ch/schema/apu2c.pdf even if I'm not going
> to do board-level repair myself :)
I will have a closer look at that. One requirement I have is that the
equipment be able to run from 11~15V… as the battery supply will be
hovering around the 14.6V mark when at full charge.
I couldn't find an absolute maximum ratings section on the APU2
documentation, but a look at the schematics seems to suggest that all
parts that connect to the 12V bus (they seem to like their O2Micro DC-DC
converter chips) are able to take 24V or higher.
Thus, the schematics have proven themselves useful already. :-)
The other thought in the back of my mind was going to Technologic
Systems; I've previously ported mainline Linux to their TS-7670 (mine is
running kernel 4.14), so OpenBSD could be an option there too. The
TS-7680 is similar, adding an extra Ethernet port which would meet the
needs, but neither is spectacular on the RAM and CPU front. Given
people have commented about OpenBSD 6.3 kernel re-linking chewing up the
RAM, I'm not sure how they'd go.
The other option I was considering was a NUC or similar, but most are
single Ethernet, and by the time I've kitted one out with a 12V-19V
adapter, the APU2 is about the same price.
I note they've got a supplier in Victoria, so definitely worth considering.
--
Stuart Longland (aka Redhatter, VK4MSL)
I haven't lost my mind...
...it's backed up on a tape somewhere.
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