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Re: external PIR's
- To: <ukha_d@xxxxxxx>
- Subject: Re: external PIR's
- From: "Campbell" <c.macd@xxxxxxx>
- Date: Fri, 1 Sep 2000 20:26:39 +0100
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
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<4.3.1.0.20000830140357.00b1a380@xxxxxxx>
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- Reply-to: ukha_d@xxxxxxx
Nigel
The pir is for opening the comfort zone which will trigger x10 to switch on
lights and camera power, send ir signal to tv and video to switch to
tv/video channel, switch relays on comfort from DVD system and finally
start
a 30second video record by ir.
And if that works without a hitch I'll eat my hat....
Campbell
----- Original Message -----
From: "Nigel Orr" <Nigel.Orr@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, August 31, 2000 10:04 AM
Subject: Re: [ukha_d] external PIR's
>
> At 00:06 31/08/00 +0100, you wrote:
> >Recommendations please for external PIR's to cover my drive/door
for
> >connection to a comfort zone.
>
> PIRs are fairly fickle creatures outside, because there is so much
moving
> heat anyway. So you either have a really insensitive one or loads of
false
> triggering.
>
> I've got one mounted for camera switching, just a cheap Maplin one as
it's
> protected from the weather, pointing down at the ground, and it's OK
for a
> 3-4m range, but it does false-trigger on occasion, I'd definitely not
use
> it to trigger an alarm (you probably weren't planning that), and the
> spurious 'ding-dong' noises mean I don't even use it as an automatic
> doorbell any more, just for camera switching, where occasional false
alarms
> don't really matter.
>
> If it's on a North-facing wall, away from traffic, it should work more
> reliably.
>
> Could you use active (beam-break) IR instead?
>
> Nigel
>
>
>
>
>
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