RE: Re: IR Distribution

["Brian G. Reynolds" <brian.g.reynolds@xxxxxxx>]

Oh the things you learn belonging to this group......

Or did I just say that....;-)

B.

> -----Original Message-----
> From: Ian B [mailto:Ian@xxxxxxx]
> Sent: 15 October 2001 11:20
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Re: IR Distribution
>
>
> Hi Nick
>
> In reverse order - TSOP. I have no idea but it is the IR receiver bit
that
> plugs into the board via a 3.5 mm stereo jack. It takes the IR signal
and
> demodulates it producing a readable output equating to 1's and 0's or
> whatever. My units don't care what it sends as they either propagate
the
> signal to another unit or re-transmit it locally via an IR
> emitter or both.
> TSOP's come in different flavours, the two I am interested in are
> 38KHz and
> 56KHz which make up most of the IR devices found in the home.
>
> These units use a PIC micro controller to add some smarts to the task
of
> sending and receiving IR throughout the house.
>
> There are two TSOP inputs provided, one for 38KHz and the other for
56KHz.
> You can connect more than one TSOP to either input but they must be of
the
> same KHz range. This is nothing to do with the TSOPs but the PIC
treats
> input on a port as either 38KHz or 56KHz. If you mix these you
> could change
> the IR signal from 38KHz to 56KHz or vice versa. Might be what you
want to
> do????
>
> There are two outputs which can send either 38KHz or 56KHz. These are
> configurable as either both 38KHz or one of each. Most people would
have
> them as both 38KHz due to the scarcity of 56KHz kit.
>
> Configuration options include setting whether the unit provides
feedback
> protection or not. This means that if a unit is sending IR it will not
> receive it from the onboard TSOP unit at the same time. This
> avoids feedback
> loops etc. This feature can be disabled so the unit can be used
> to 'relay' a
> signal into a cabinet for example. Care would have to be taken to
> ensure the
> unit does not receive the signal it is sending otherwise a
> feedback loop may
> happen.
>
> I am looking at some tweaks to improve reliability but have little
news on
> that yet. Essentially I will be trying to make sure an IR signal
> is real and
> not stray light. This feature will be switchable on/off as I cannot
guess
> everyone's application.
>
> Finally these units communicate with each other using an RS485
> bus. This is
> multidrop (many units) in a daisychain fashion. I have tested two
> at over 80
> meters with alarm cable with no problems.
>
> There is more so if you have any specific questions please drop me or
the
> list another line.
>
> Ian
>
> > -----Original Message-----
> > From: nickt@xxxxxxx [mailto:nickt@xxxxxxx]
> > Sent: 15 October 2001 10:18
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] Re: IR Distribution
> >
> >
> > Hello Ian,
> >
> > I'd be keen to learn more about how your products can be used
& their
> > functionality - please can you give me / point me to appropriate
> > info? Also (excuse ignorance) what does TSOP stand for?
> > Thanks
> > Nick
> >
> >
> > --- In ukha_d@y..., "Ian B" <Ian@M...> wrote:
> > > Hi Nick
> > >
> > > In the recent past I have produced a circuit board which
goes with
> > a circuit
> > > designed by Nigel Orr. I have been working recently on a PIC
based
> > system
> > > which is nearing completion. I have working prototypes and
have
> > tested both
> > > transmission range between units and TSOP to unit range at
over 80
> > meters.
> > > They also have built in feedback protection with an override
> > depending on
> > > the type of use intended. If you have more specific
questions just
> > ask.
> > >
> > > Ian
> > >
> > > > -----Original Message-----
> > > > From: nickt@t... [mailto:nickt@xxxxxxx...]
> > > > Sent: 12 October 2001 13:59
> > > > To: ukha_d@y...
> > > > Subject: [ukha_d] IR Distribution
> > > >
> > > >
> > > > Hello,
> > > > I'm new to this group. Main HA interests are audio (+ a
bit of AV)
> > > > distribution over Cat5. Have been trying out Keith
Doxey's KAT5
> > > > modules with pleasing results (and will probably need
some audio
> > > > specific ones, cost permitting...) but I'm unsure about
direction
> > to
> > > > go wrt IR distribution.  At this stage all I really
want to do is
> > to
> > > > be able to take my hifi remote into one of 3 or 4
different rooms
> > &
> > > > control it from there. I'd prefer to use CAT5 rather
than radio.
> > > > I'm sure its not rocket science, what solutions are out
there? I'm
> > > > happy to put together simple circuitry myself if thats
what it
> > takes.
> > > > Any advice, pointers appreciated.
> > > >
> > > > Nick
> > > >
> > > >
> > > >
> > > > For more information: http://www.automatedhome.co.uk
> > > > Post message: ukha_d@y...
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> > > >
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> > > >
> > > >
> > > >
> > > >
> >
> >
> >
> > For more information: http://www.automatedhome.co.uk
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>
>
>


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