Newsgroups: comp.robotics
Path: brunix!sgiblab!swrinde!cs.utexas.edu!uunet!pipex!uknet!reading!suma1!ssrhouns
From: ssrhouns@csug.cs.reading.ac.uk (Paul Hounslow)
Subject: Re: RF communication
Message-ID: <CDCnD2.C8s@csug.cs.reading.ac.uk>
Sender: news@csug.cs.reading.ac.uk
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Reply-To: ssrhouns@csug.cs.reading.ac.uk
Organization: Dept. of Comp. Sci., University of Reading
References: <27239n$9qk@osceola.cs.ucf.edu>
Date: Tue, 14 Sep 1993 15:07:49 GMT
Lines: 40

In article 9qk@osceola.cs.ucf.edu, wampner@longwood.cs.ucf.edu (Eric Wampner) writes:
>
>I am looking for RF based communication circuits, specifically
>ones which will allow communication around a typical house.
>
>I could use standard walky-talkies, but would then need a modem
>for them. for price/power consumption reasons, I would prefer
>a component based solution (ie a chip or two).
>
>Pointers to a book on RF communication for people who are not
>EE majors, wish to build something along these lines, and would
>like to understand it too would be appreciated.
>
>eric wampner
>wampner@acme.ist.ucf.edu
>wampner@cs.ucf.edu
>

I can't say for the R.F. circuits, but for using two walky talkies, or other _voice_
wireless products I have found a Ham TNC best.  This allows only low speed data though
(they tend to operate at 1200 baud on a packet switched system, although faster ones
are available now).  I have one that runs for about 10 hours on four AA nicads, so
power is not a problem (well compared to the RF stuff).  Another solution, at least
for transmitting to the robot, is to use an inductive system like the T-coil systems
used to send sound directly to hearing aids in theaters and the like.  This is only
of use one way, and generally limited to single rooms or buildings, although it has been
used to provide campus radio at some universities.  That would only require the use
of audio technology.

73's de Paul

----
Paul Hounslow                    The smelling pistakes are all my own.
Packet: G4YFE@GB7BEQ             EMail:  ssrhouns@reading.ac.uk
1990 16 valve K100LT             DoD #0573

Programming makes you paranoid   (Now where was that bug?  No not THAT one).
Motorcycling makes you paranoid  (Is that ovloV trying to kill me?  YES!).
I do both                        WHO SAID THAT!

