RE: ir transmitter some success

["Ian B" <Ian@xxxxxxx>]

I was trying to have one receiver unit but many receivers (TSOPs). If
the
receiver started hearing from one TSOP it would ignore the others. I have
a
bald patch to show my lack of success.

I did look into CEBus (is that the same?) but it was expensive on
hardware
and I am as always on a budget this wan not good. I think the way I am
going
with the PIC and a 485 multi master bus is a winner. I have even found a
way
of cutting down on reflection problems when the bus is not quite as
daisy
chained as it should be.

Ian

>-----Original Message-----
>From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
>Sent: 02 June 2002 09:56
>To: ukha_d@xxxxxxx
>Subject: Re: [ukha_d] ir transmitter some success
>
>
>Hi Ian
>            What
do you mean by collisions ? Also did you by chance read a
>previous post by Dave Mc laughlin regarding Can Bus . Now thats
something
>worth having a look at . Apparently works as a multi master  
system were
>the unit with highest prioirity message gets control of the bus no
polling
>required. Sounds good eh?
>
>Frank Mc
>
>----- Original Message -----
>From: "Ian B" <Ian@xxxxxxx>
>To: <ukha_d@xxxxxxx>
>Sent: Sunday, June 02, 2002 6:40 PM
>Subject: RE: [ukha_d] ir transmitter some success
>
>
>> Hi Des
>>
>> What you need is the system I am in the middle of building. It
will give
>> zoned input and output all down the serial port. It won't be
connectable
>> directly to HV or similar though (I don't think). It is a work
>in progress
>> and time is the problem as always.
>>
>> I ended up building this after trying to do collision
detection
>with logic
>> chips and effectively doing what you suggest. I decided this was a
quick
>way
>> to insanity!!
>>
>> I wish you luck
>>
>> Ian B
>>
>> >-----Original Message-----
>> >From: Des Gibbons [mailto:des@xxxxxxx]
>> >Sent: 02 June 2002 07:38
>> >To: ukha_d@xxxxxxx
>> >Subject: RE: [ukha_d] ir transmitter some success
>> >
>> >
>> >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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>> >
>> >
>> >
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>
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>
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