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RE: Probably a simple question but I'm new to this...
- To: <ukha_d@xxxxxxx>
- Subject: RE: Probably a simple question but I'm new to
this...
- From: "Ian B" <I.Bird@xxxxxxx>
- Date: Fri, 5 Jan 2001 12:32:40 -0000
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Does anyone have any info on ultrasonic devices e.g. web address etc? This
would be a great way of doing lighting in rooms like a lounge or kitchen
not
to mention security.
Ian
-----Original Message-----
From: Mark Johnson [mailto:poco.loco@xxxxxxx]
Sent: 05 January 2001 00:33
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Probably a simple question but I'm new to this...
Use a Microwave or Ultrasonic detector which will detect the smallest of
movements unlike a PIR
>
> I want to detect the presence of people in rooms for an arbitrary HA
system
> ... movement is easy to detect with PIRs but once the movement ceases
(say
> when you're sitting watching a movie) then how can you detect that the
room
> is still occupied?
>
> Phil
>
>
>
>
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