[PSUBS-MAILIST] instrument and environment display

[jon4156 . via Personal_Submersibles]

Sean,

It's always a balance of cost vs performance in the recreational arena.
Fortunately these low cost microprocessors are fast enough to produce more
than adequate response time for sensor data collection and information
display.  Even if it were as slow as 1hz refresh (it's much faster than
that) that would likely be adequate for our particular application.

Jon


On Thu, Jul 16, 2015 at 9:41 AM, Sean T. Stevenson via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:

> Jon - sounds like an interesting project. I've never played around with
> any of those low cost / DIY solutions, but it sounds like they're rapidly
> closing the performance gap with true industrial systems.
>
> At work, I do a lot of data acquisition and embedded controller
> development using National Instruments hardware, particularly on the
> CompactRIO hardware platform, which combines deterministic real-time
> processing with FPGAs for high speed low level I/O. I'd probably still be
> inclined to go that route (real-time vs pre-emptive OS) for a critical
> application (life support, excursion control, etc.), but the barriers to
> entry are high. The last small system I built was about $4000 for the
> controller and FPGA, exclusive of I/O modules.
>
> Accessible technologies like BASIC stamps, Arduinos and Raspberry PI are
> generating a ton of impressive DIY projects these days, and might be
> perfect for a PSub.
>
> Sean
>
>
>
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