Re: Sat on a Toilet Sensor ?

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

how about a weight-sensor under the WC, or a strain-gauge on the
floor, nearby, or even beam-break sensor ?

Chris


On 11 Jul 2007, at 10:49, Marcus Warrington wrote:

> OK.. I need some ideas for a little problem I have.
>
>
>
> I am currently refitting our bathroom and I need a way of activating a
> fan but ONLY when some is SAT on the toilet. The fan is a "pan
fan"
> that
> extracts air from the toilet bowel to prevent.. err.. smells..
> pervading
> the room. I did a mini bulk buy of these a few years ago.. which
> reminds
> me, Kevin.. I still have yours in a box somewhere.. let me know your
> address and I'll get them sent to you!
>
>
>
> My first thought was a PIR but that would be difficult to restrict to
> only "sitting" on the toilet i.e. it would detect if someone
reached
> down and lifted up the seat , or maybe even some one standing there to
> pee etc.
>
>
>
> Next thought was use an ultrasonic sensor mounted on the wall
> behind the
> toilet bowel (the cistern is concealed in the wall) and adjusted to
> point down at a 45 degree angle so that it covered the rear half of
> the
> toilet. Problem is I'm not too sure how "focused" the beam
can be made
> on these devices.
>
>
>
> Another thought was to use a stress sensor (or weight sensor ?) on the
> toilet bowel. In some ways this would be the ideal since it would not
> rely on proximity to trigger. Problem is I have no idea what I'm
> looking
> for, how much they are, how easy they are to integrate with a relay
> etc
>
>
>
> Anyone got any ideas ?
>
>
>
> Marcus
>
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