Re: X10 Motion detection

["rb_ziggy" <richard.boreham@xxxxxxxxxxxx>]

Also...  I think you will find that the pulse count is internal to
the PIR in that it does the counting before closing/opening the
contact to the alarm system.  Consequently you do not have access to
the count directly to do this kind of thing.

The only thing that might be possible is to use a high sensitivity
occupancy PIR (one count) and do the pulse count piece in the Comfort
or a PC itself (i.e. using a counter and a timer to see how many hits
in a given period).  Comfort does give an example of such 'double
knock' programming.  However this is really used for situations (e.g.
external prowlers) where false triggers (cats/foxes?) are really to
be avoided.  Unlikely to be very desirable for the regular internal
alarm monitoring.

Regards

Richard

--- In ukha_d@xxxxxxx, ian.bird@c... wrote:
> Not quite true. You are correct as far as you go but occupancy ones
tend
> to be a lot more sensitive than the 'standard' ones and of course a
bit
> more expensive. A lot of them have different fields of view too
e.g.
> overhead looking down 360 type. Lots of choices ;-))
>
> Ian
>
>
>
>
>
>
> "Marcus Warrington" <marcusw@m...>
> 21/06/2004 14:02
> Please respond to ukha_d
>
>
>         To:     <ukha_d@xxxxxxx>
>         cc:
>         Subject:        [ukha_d] Re: X10 Motion detection
>
>
> Thanks to everyone for the advice on PIRs for room occupancy.
>
> Since the only difference between occupancy and alarm PIR is the
pulse
> count, I assume that I could set them to trigger on a single pulse
but
> then set the "controller" (i.e. PC) to ignore any
"false" single
counts ?
>
> I'm thinking of also putting some IR receivers (and possible
transmitters)
> in the ceiling, can these be run on the same piece of cat5e as the
PIR
> (like running Telephone and Ethernet over a single cat5e cable) ?
>
> Thanks
>
> Marcus
>
>
>
>
>
>
> [Non-text portions of this message have been removed]