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Re: Intelligent Light Switching - Thoughts?
- To: ukha_d@xxxxxxx
- Subject: Re: Intelligent Light Switching - Thoughts?
- From: "PatrickLidstone" <patrickl@xxxxxxx>
- Date: Wed, 02 Jan 2002 11:15:39 -0000
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
--- In ukha_d@y..., "Steve B" <steve@b...> wrote:
> Could you not improve this with better PIR position or more than
one ?
How's this for a barking mad bit of lateral thinking?
Put a light sensor in the vicinity of the seat.
1. PIR detects movement and turns light on.
2. Timer started
3. Mark sits down for a 3 hour nap at his desk
4. Light sensor goes from light->dark even though room is lit.
5. Timer expires. If light sensor is dark - reset timer; if light
sensor is light room is empty - turn off light.
Major issue is positioning light sensor adequately. It doesn't have
to be directly fixed to the chair - as long as it is in a shadow
(perhaps on the floor in the vicinity of the desk?)
Patrick
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