Re: [PSUBS-MAILIST] Alternative to Through-Hull Ports forElectrical Connections

[Peter McKellar <mckellar@earthlink.net>]

My spin on this is that it is not probably an optical coupling.  The receiver in the PC would be getting

a digital signal (suitably modulated on the TV carrier wave) which it could treat as code - you would

just need a simple program to gather the bits and store them.  The box in the top of the screen would

just be digital data.

 

The same trick is used by TELETEXT services (esp for the hard of hearing or in pubs) - the data is

transmitted in the non-display control lines with every image.  As you note this is only one-way and

would require 2 systems to work.  But as it is really still radio/TV rather than optical, we would be

back to the optical coupling suggestion.

 

Whilst information is a key thing to be passed externally - controlling motors, hydroplanes etc,

my biggest concern is power transmission.  A number of submarine disasters relate to deisel

engines getting access to cabin air (hatch left open etc), soffocating the crew.  This is probably

unlikely to be an issue for me, but batteries explode also.  I favour having them outside the

cabin.

 

At this early stage I still favour an acrylic hull (transparent anyway - c'mon transparent aluminium),

but as raised here, passing wires through a plastic hull may be fine until there is a short and it melts

through :(

 

Induction is still looking good - but still way short on ideal

 

cheers

peter

-----Original Message-----
From: DAVID A HAVERBERG
Sent: Nov 11, 2003 4:23 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Alternative to Through-Hull Ports for Electrical Connections

I saw a TV demo once where computer programs were sent over the TV airways.  They were a small box of static on the lower left of the screen.  If you had a receiver, Your computer could watch the box and a program would be downloaded to it.  Perhaps a two way system could be shown and viewed through a normal view port?

----- Original Message -----

From: NeophyteSG@aol.com

To: personal_submersibles@psubs.org

Sent: Tuesday, November 04, 2003 12:42 AM

Subject: [PSUBS-MAILIST] Alternative to Through-Hull Ports for Electrical Connections

 

Someone in a thread a while back was pondering alternatives to actual hull perforations for transmitting electrical data (e.g., inductive).  I've been pondering it and a possibility occurred to me ... what about an optical coupling?  I envision a small acrylic viewport with optical transceivers on each side.  Might have to make myself a prototype.  What form(s) would our theoretical signals be?  Digital or analog?  How many simultaneous paths/channels would be needed and which ones could share?  Thoughts?

 

Shawn

 

 

*****

"To see a World in a Grain of Sand
And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand
And Eternity in an hour."

-- Auguries of Innocence, William Blake, ca 1803