Dive Computer Ramblings

[Robert Helling]

On 10.09.2014, at 05:56, Dirk Hohndel <dirk at hohndel.org> wrote:

> 
> Linus started this on Google Plus, but that seemed a rather odd and transient place for it.
> 
> So I started a new topic on the website. To keep things organized this is now under “Misc" together with the “Thanks” page (sorry Linus, the URLs have changed slightly).
> 
> Linus and I each have posted a page with our thoughts about the dive computers we have used. I’ll invite others here to share their own stories.
> 
> http://subsurface.hohndel.org/misc/dive-computer-ramblings/

Nice one. Reading Linus’ opinion and in particular the „why air Integration?“ part let me have an idea what would be nice to have (build?): As Linus writes, during the five the air Integration is of little use, but the information is interesting afterwards. Plus the main problem with the implementation of air Integration is that wireless data connections in the water are hard to get right and doing it old style with hoses does not work well with wrist mount computers. And things start to get complicated as soon as you have multiple cylinders.

So let’s combine that information: It seems to me what you want is not an air integrated computer but in fact a data logger that is in a small box that sits on the first stage of your regulator like the transmitters do. Just have a pressure sensor and a real time clock and write that off to flash memory and make that accessible via USB. The electronics with some micro controller shouldn’t be too hard to build, but it would be beyond my capabilities to put that in a water tight box and make it not explode when connected to a 300bar cylinder. But I guess it should be possible to even build a prototype for less than 100 currency units roughly.

What do you think? Anybody here with experience in the watertight/pressure area?

Best
Robert


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.hohndel.org/pipermail/subsurface/attachments/20140910/3cd0e216/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 496 bytes
Desc: Message signed with OpenPGP using GPGMail
URL: <http://lists.hohndel.org/pipermail/subsurface/attachments/20140910/3cd0e216/attachment.sig>