RE: ir transmitter some success

["Des Gibbons" <des@xxxxxxx>]

Frank,


OK, just to really make things complicated ;)

Would it be possible, you're gonna love this, to reverse the whole
concept
and use it for zoned IR input :) obviously each zone would need a TSOP
or
similar, but is there a simple way of using trannies to indicate which
zone
is active and send the data on its way. Collisions seem to be the
biggest
stumbling block to me :/

Obviously the LPT port would have to be bi-directional.

/me scurries off to see how many pins are available on an LPT port ;)

Cheers, Des.

> -----Original Message-----
> From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
> Sent: 02 June 2002 18:23
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] ir transmitter some success
>
>
> Now thats Better Des
>                                 
I cant see why not . So long as you dont
> change the state of the  lpt  port  pins that are being
used for the
> multiplexer while transmitting just the tx pin . Pin 4 which
> enables the 555
> i would opto isolate from the printer port.
>
> Frank Mc
> ----- Original Message -----
> From: "Des Gibbons" <des@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Sunday, June 02, 2002 3:51 PM
> Subject: RE: [ukha_d] ir transmitter some success
>
>
> >
> >
> > >
> > > Sorry Des
> >
>                
I just assumed serial . That shouldnt be a problem
> > > ,selecting zones . I assume some other device is
generating
> the ir 38khz
> > > carrier?
> > >
> >
> >
> > errr, the LPT port :)
> >
> > http://www.czechin.com/minidisc/gener.gif
> >
> > Now, can they both be on the same LPT port is the question :)
> >
> > Des
> >
> >
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>
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