Re: Re: Bathroom project - Cbus style lighting system....1 room only though!!

[Stephen McGarry <Selfbuild@xxxxxxxxxxxxxxx>]

power the PIR and timer in paralell the use the output of the PIR to
activate a relay with the contacts in series after
the timer. Thus PIR stays powered and doesnt do the 'turn on thing'.
Alternately use as small power supply to replace
the battery in the timer.

HTH
Stephen

noel_pilot wrote:
>
>
> Hi all,
>
> It's Christmas day, I've got a small stash of money to let me get
> cracking on my bathroom so I'm looking to order my stuff! :) this goes
> nicely with my chilled eve, wine and royle family!!
>
> one question on this, ideally i'd put the PIR before the timer that
> way the light wont turn on when the powers supplied each evening as it
> would if the timer was in front of the PIR.
>
> Only problem with this is that the timer then doesn't have any power
> to it to power the timer!!! Now I know a few have battery backup but
> this means that the timers going to be running on battery backup near
> enough permanently! something like http://tinyurl.com/a6xgze
> <http://tinyurl.com/a6xgze> the only
> time it would actually have mains power would be during the brief
> periods that someone uses the bathroom between 2200 and 0600.
>
> Has anyone used any mains timers predominantly on battery backup??
> Some of the other timers on sites i've looked at get slated, this one
> slightly less so than others.
>
> Any advice all??! Thanks
>
> Noel
> Happy Christmas,
>
>

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