Re: X10 MS13 - How can I modify it to only send OFF signal

["egelbeertje" <r_d_k@xxxxxxx>]

ok, you guys got me thinking so here's some more food for thought :

How about using a dedicated 230v powered PIR with a build in relay
next to the momentary switch that controls the LD11. The PIR would
then have to control the live or neutral feed from the LD11 thus
allowing the LD11 only to be controlled once movement has been
detected and 230v switched to feed the Dimmer. This would then
theoretically allow switching on the light if you want to because
there is movement when wanting to switch it on, and will always cut
the light after no more movement for a while, plus even in the dark
you can move around and only intentionally light the room because you
have to push the switch.....

Now would that damage the LD11 since there will be a lot of power
cuts to that module (L or N) and what will be the reset status of the
LD11 after a power cut, it's no good if it goes to full ON all the
time ;-) since that would make this setup a bit useless.

hope you're still with me here.

Rob.


--- In ukha_d@xxxxxxx, "garygfx" <garygfx@y...> wrote:
> Switch the light off if there's no movement? MS13's are the wrong
> device to use for that, they'll detect small-ish movements but
> they're not occupancy detectors. Take this example:
>
> I have a MS13 in my downstairs toilet. It works well if you do a
wee
> or a quick number too, but if you're longer than 4 minutes it will
> leave you in the dark! Guests give me a strange look when I tell
them
> to wiggle if they're still in there after 4 minutes! ;-) It will
only
> leave the light on if it detects movement, but sitting down and
even
> reading a paper doesn't generate enough movement to trip the MS13.
> You can try to improve detection using two of them placed at 90
> degree angles so they can pick up Z-axis movement better (body or
> limb movements from/to the sensor).
>
> As others have said, use a controller to make a logical decision
> about controlling the light. Using various parameters you can try
to
> eliminate unwanted "off" commands. e.g. ignore an off
command if
one
> has been sent withing the last minute. This will prevent it being
> turned off again if someone has turned it on again because it was
> mistakenly switched it off!
>
> Gary.
>
> --- In ukha_d@xxxxxxx, "egelbeertje" <r_d_k@h...>
wrote:
> > Hi,
> >
> > Since I installed some LD11's over the last weeks, kids seem to
> > forget to switch off the lights more often - duh.
> > Now I would like to add an MS13 to switch off if no movement in
the
> > rooms but I don't want it to send ON signals (since they also
tend
> to
> > move a lot when they're sleeping I don't feel like having putting
> > them back to sleep because the light went on in the middle of the
> > night.)
> > Also I could do without the dusk sensor - switching the light on
> has
> > to be a manual thing for the kids, it only has to go off if
they're
> > not around.
> >
> > Any ideas & suggestions welcome.
> >
> > Rob.