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[kent]

This is for my son's science fair project:

He wants to have a remotely activated
On/Off switch. That is to say, when motion
is detected, a lightbulb needs to turn ON --
and STAY ON indefinitely. We don't want
the motion detector to send an OFF signal
after a predetermined amount of time. Then
when the Same motion detector detects
motion again, the lightbulb needs to turn
OFF.

We need a motion detector (some sort of
sensor that is activated by an interupted
beam rather than by physical contact), that
can alternately trigger this On/Off
sequence, just like closing and opening a
circuit by physically turning a lightswitch
on and off -- a remote on/off switch.

Doesn't seem like it should be too
difficult. Everyone turns their T.V. on and
off remotely, we just need the circuit to
alternately open and close each time motion
is detected rather than by the physical
push of a button or flick of a switch.

Anyone know how we can set this up?

Thanks!
Kent

[j barber]

you could use a vista 20p allarm pannel which
supports x-10 lighting and automation control
let me know if thats a option for you and
i will be able to help you set that up

[j barber]

you could use a vista 20p allarm pannel which
supports x-10 lighting and automation control
let me know if thats a option for you and
i will be able to help you set that up

[dave w]

You will need some external logic to turn a
light OFF based on the second ON signal from
the Hawkeye motion detector.The cheapest is
probably going with X10 Activehome Pro and
the CM15 interface. Your first ON from the
Hawkeye will turn on the light and set a
flag. Use a conditional to turn the light
OFF and reset the flag if a second ON is
received and the flag is set.

http://www.x10.com/activehomepro/activehome-
pro.html

Jumping to conclusions here...If your desire
is to count the number of bodies going in to
a room, and turning off room light when the
last body leaves, the suggestion will not
work.

[tommy]

How about this from Radio Shack:
Invisible Beam Entry Alert
Model: 49-312