I know there are motion sensors which detect movement and can turn on
a light fixture. What I was wondering is there a way to do this inside
a house? I would need one that would detect a person walking _into_
the room so the light would cut on several feet before a person enters
Is there a relatively cheap and easy way to do this?
Perhaps I might want to do only one room to see how it would work out?
Sure. They cost about 10 bucks at Walmart and are normally
used for driveway and outside monitoring. Just buy one and
hook it to an electrical cord and place it somewhere to experiment
on the coverage.....
The biggest drawback I can see is that they probably won't fit
in with your decor, but you can hide it behind something that is
transparent to infrared, or in the foliage of a fake plant, or
something.... The sensors are the same as the expensive ones
that is used in stores, except the Walmart versions are mass
produced which gets the price really low......
Get one and try it out. Use it to turn on a floor lamp or
something and let your imagination run with it.....
However, if you fall asleep on the couch at 11pm, expect to
wake up with the lights out. Just wave your arms and they will
come on. If you toss and turn in your sleep, the damn thing
will go on and off and you probably will unplug it.... (grin)....
Sure, there are ones that can be used to replace a wall switch.
To see one example, go to homedepot.com and search for 100396703
My brother has these in his house, though of course when they turn on
depends on the location of the switch it replaces.
"BOB" < email@example.com> wrote in message
They are basically IR sensor. I have one at the hallway leading to
garage entry door. When you have handful and step into house from
garage, voila! light comes on. It has adjustment for sensitivity and
Yes. In the office where I used to work, they mounted a motion sensor on the
ceiling of the bathroom to turn on the lights and exhaust fan. Just pushing
the door open was enough to activate it. You can also buy motion sensors
that mount in an existing switch box. Before you rush out to Home Depot or
Lowe's, check your yellow pages and see if there's an electrical supply
store you can visit. You're likely to get better advice there for selecting
the right thing.
As far as cheap, that's an impossible question to answer, since nobody knows
what you mean by cheap. And "easy" - it depends. Have you done any
electrical work already?
There are basically 2 types of motion sensor. The standard motion
detector that you see on flood light assemblies is a one shot trigger
that times out and needs another motion after the time out to
retrigger. The other type is an occupancy sensor that will mount in a
device box and can retrigger before it times out, restarting the time
I have a mix of those around my house, inside and out so the light
follows me around as I move.
Good locations are halls, bathrooms and the rooms you go through to
get somewhere else. The kitchen is a prime location for a occupancy
sensor on low level lighting. It keeps the wife and kids from using
the fridge light as a night light.
On Thu, 23 Mar 2006 18:55:06 GMT,
"Mitch@this_is_not_a_real_address.com" <> wrote:
Yup, the only danger is these things become addictive once you get
used to them. I have at least 20. There is no place you walk that
doesn't trigger a light. I use low intensity lighting so it is not
obtrusive but you are not in the dark in many places. Basically the
only rooms without them are the bedrooms. Outside I have them all
over, again triggering low intensity walkway lights. I have a couple
that trip floods but only in areas where nobody is supposed to be.
There some you can replace your switch with. Only thing though' most
of them do not work well with flourecent lamps.
On Thu, 23 Mar 2006 14:38:41 -0500, firstname.lastname@example.org wrote:
I thought you were going to say you didn't know how to turn the lights
on when you were some place else.
Off-topic, but I have my refridgerator and freezer doors set to shut
by themselves, so whenever I go somewhere, I never remember to shut
Can be done, but if you want it to happen -before- someone gets into the
room, it's a little more tricky. Problem is, motion sensors don't "see" the
target well when the target's motion is directly toward or away from the
detector. Since they detect motion by way of a change in heat, and you want
to do this indoors which is close to body temp (as opposed to outside), you
may well be within arm's length of the sensor before it sees you.
It can see you in an instant from 20 feet or more if you move _across_ it's
field of view however. You can adjust the sensitivity, but sometimes the
thing will be triggering the lights so often that a plain ol' switch would
Most flourescent lights won't work with these switches either.
Depends on what type you use. My office building had fluorescent lights
working with motion sensors, with no problems at all. This is why the OP
should consult an electrical supply place, or he'll be back here asking why
he keeps killing switches.
You can buy a driveway/yard type of light with two sockets and the sensor
for about $10 here. Look through the instructions, some have a wire to turn
on remote lights. This type has a relay output and you can easily remove the
sensor and use it to turn on any light. Put one in my girlfriends garage to
turn two old kitchen ceiling fixtures on. Works like a champ.
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