[Xastir] New code testing

[James Jefferson]

On Thursday 24 July 2003 05:14 pm, you wrote:
> Optical grade Epoxy ?? Tell me more.

1-800-Epoxies :-)
http://www.epoxies.com/tech/20-3238R.pdf
http://www.epoxies.com/potting.htm

Switchcraft makes nice gold plated connectors that are supposedly waterproof. 
I could use those topside.

My thought would to just make the display the waterproof part. Use a backlit 
LCD with and a E-Lab serial to LCD controller. Just have serial out, ground, 
and +12 volts go underwater. The circuitry would be the e-lab controller, 
lcd, and 5 volt regulator. Minimal stuff to break and be forever untouchable 
in the potting compound. Set the thing in a good chunk of potting compound 
and attach a lanyard to it so I can clip it to my BCD. Perhaps use CAT5 with 
Kevlar pull string inside it so it could be the data cable as well as the 
line to the flag.

On the surface would be the smart stuff to make the LCD show something useful. 
Probably have a PIC or similar microcontroller that alternates between 
showing my course, speed, date, distance and bearing to what I selected 
topside.

'would be a fun project.

-Jim KB0THN

PS - then I would hook the D7 to the Etrex and transmit my position to my 
Xastir station. Now we are back on topic. :-)


> Maybe waterproof but that is quite different from SALT PROOF. I would go
> for some cheap data engine on these applications and pot them up.
>
> Rich
>
> On Thu, 2003-07-24 at 17:31, James Jefferson wrote:
> > Nifty idea. I'll float my Etrex on the bouy and then run the power and
> > serial down to an LCD display / PIC that I could pot in optical grade
> > epoxy.
> >
> > I'm going diving this weekend and plan to take my GPS with me. It's an
> > etrex which is supposedly waterproof, but I still intend to put it in a
> > translucent top Pelican case.
> >
> > -Jim
> >
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