Tell me more.  Is it the same protocol used to talk to the X10 CM11A
computer interface module?  Any links to additional information would be
greatly appreciated.

Thanks,
Adam

On Wed, 11 Aug 1999 16:23:27 -0400 Adam Davis <adavis@BALADYNE.COM>
writes:
> Yes, it is quite a spiffy little device.  There are details on the
> 'net about
> the protocol for communicating with the pic and the transmission
> protocol, as
> well as the frequency (I think 300MHz??).
>
> I would be interested in a circuit design for such a transmitter.  I
> imagine
> it's a simple oscillator being fed into a pcb track(or jumper)
> antenna.  The PIC
> can turn the osc on or off with a pin or two...
>
> Anyone have some radio experience and time?  I'm willing to post the
> schematic
> if I could get some help identifying the parts and/or critical
> values.  (I
> imagine the pcb design becomes an issue at this frequency?)
>
> -Adam
>
> Adam Bryant wrote:
> >
> > Rob,
> > On the X10 web site it does say that neighboring houses can be
> affected
> > by your X10 signals if they also have X10 using the same channel
> (house
> > code).
> >
> > A friend here in my office and I recently purchased the new
> FireCracker
> > kit and have been having fun randomly turning each others
> lights/fans
> > on/off.
> >
> > Incidently, the Firecracker kit includes a RF transmitter module
> that
> > plugs into a PC serial port and operates in passthrough mode
> somehow (you
> > can hook a modem or whatever into the back of the module and the
> modem
> > doesn't know the X10 module is there).  Imagine my surprise when I
> pried
> > this transmitter module open to find a surface mount 12C509 on the
> tiny
> > breadboard for this unit.  The whole unit is basically a
> breadboard with
> > the PIC, a few other surface mount components (resistors and caps
> and
> > whatnot), and a couple of small loops of wire (antenna?).  Would I
> ever
> > like to get a look at the code for that!  However, I am sure that
> it is
> > code protected and I WILL NEVER crack or otherwise copy someone
> elses
> > hard work without their permission.
> >
> > Maybe one of the RF gurus on this list can give us a high-level
> > explanation of how you can make a transmitter out of a PIC and a
> loop of
> > wire.
> >
> > Adam
> >
> > On Tue, 10 Aug 1999 22:51:04 +1200 Rob Bakker
> > <Rob@MAILSERV.WAIKATO.AC.NZ> writes:
> > > Anybody know if there is a distributor in New Zealand/Australia
> who
> > > sells
> > > X10 modules? (TW-523 or PL-513)
> > > How far do you reckon the signal will propergate?  to the
> nearest
> > > pole
> > > transformer or beyond?
> > >
> > >
> > > if this is OT then i apologise in advance and reply to me off
> the
> > > list
> > >
> > > Rob Bakker
> > >
> > > rob@waikato.ac.nz
> >
> > Adam Bryant (age 0x23)
> > abryant@peaktech.com (work)
> > adamdb@juno.com (home)
> > Parker, CO, USA
> > Robotics, RC Airplanes, anything using a PIC
> >
> >
> ___________________________________________________________________
> > Get the Internet just the way you want it.
> > Free software, free e-mail, and free Internet access for a month!
> > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

Adam Bryant (age 0x23)
abryant@peaktech.com (work)
adamdb@juno.com (home)
Parker, CO, USA
Robotics, RC Airplanes, anything using a PIC

___________________________________________________________________
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