Re: [PSUBS-MAILIST] Re: more wireless communication, 'n unorthodox innie/outie power supply

[Warren Greenway <opensourcesub@yahoo.com>]

When I get the time I plan to make some IrDA
trancievers that work acoustically for submerged use.
I need to do some research to find the most suitable
frequency, but it should work great. This would allow
you to communicate and control remotely through the
medium of water.

Warren.

--- Ian Roxborough <irox@ix.netcom.com> wrote:
> 
> I'm hoping to have an external 802.11 antenna, with
> a more traditional
> thru-hull, but 802.11 will be great for short
> distance surface
> communication with surface vessels, plenty of
> bandwidth (more for b and g
> type 802.11) for video conferencing and transmitting
> video footage or
> digital still imagines taken on the last dive.
> 
> One thing about shining light through acrylic, as
> the temperature
> of the acrylic increases, there is a rapid decrease
> in the in it's
> strength.  While this might not be a problem for
> communications
> (this is will be pretty easy to test as well, just
> measure the
> temperature of the acrylic after different lengths
> of exposure to
> the level of light required for communication), it
> could be a big
> problem for sending light for energy through acrylic
> to a solar
> cell.
> 
> Ian.
> 
> 
> On Mon, 10 Nov 2003 10:35:17 -0700 (MST)
> dinosnider666@spacemail.com wrote:
> 
> > 
> > 
> > Ryan informs me my
> ultrasonic/wireless/magnetic/light communication
> proposal generated huge responses - nice to be
> loved.
> > Presently talking to award winning engie/computer
> guy at UW Sanjay Singh about jury-rigging 802.11
> card to use magnetic induction instead.
> > 
> > Just want the credit. Guy in Slashdot took my
> advice on using monitor to also use am  radio to
> chat - no credit. The jerk. Don't be a jerk!
> > 
> > Also like idea of powering thru hull with magnetic
> induction. In theory, by moving where emitter is,
> can 'plug in' to various placed on hull. For my
> seawater wetcell idea, the entire power supply is
> effectively external - so power passenger
> compartment THRU hull from OUTSIDE instead of usual
> VV. Could 'plug in' either with mechanical latches-
> or via electromagnetism. I'm playing with this for
> house-based mag-ind heaters/power plugs- with no
> plug for kids to stick a fork into!!!
> > Nice thing about using sonics, is no need to find
> right/same in/out plug position - transmits thruout!
> Using vibration isolation mounts would isolate
> various sound-based communicatons, combined with
> basic filtering would allow multiple ultrasonic
> chats at same time.
> > 
> > No reason could not isolate sound directionally
> from water like a whale, build in sound lag like in
> air for our ears (no learning needed), 'n have a
> sense of being 'immersed in the water' without being
> trapped in a tin can. SUrround sound, including
> up/down, all the better.
> > The size of soundwave dictates whether can sense
> volume differnece as well as sound lag. Thus
> elephant head being good with infrasonics. Me, I'd
> love to throw in a compression formula to expand
> hearing on ends to well into infra/ultrasonics -
> hear the dolphins play! They like 40-70,000 hz the
> best.
> > 
> > Looking to jury rig kid's toy DIY I found on laser
> pointers, embed blue laser into hunk of acrylic with
> mag-ind recharcher - or use solarcell thru
> transparent - to allow superior scuba chat. Figure
> could do it for about 20 bux.
> > 
> >  Hardcore scuba divers don't like wasting all that
> air in a full face mask. 
> > Anyway, just some ideas. 


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