controlling pir detector

[bj]

hi
i am hoping to be able to switch on a pir sensed outside light (before
entering its sensor field) using a key fob transmitter to actuate some form
of ir transmitter which
which will then trigger the light.By way of experiment i tried to activate
the sensor using two car sidelight bulbs (switching them on and off at
various spacings) however i did not manage to fool it.Does anyone know why
this will
not work? Also (assuming i get around this problem )would an ir diode or
transistor put out the right frequency
of radiation to trigger the pir?
thanks in advance
BJ

 

[Luhan Monat]

bj wrote:

hi
i am hoping to be able to switch on a pir sensed outside light (before
entering its sensor field) using a key fob transmitter to actuate some form
of ir transmitter which
which will then trigger the light.By way of experiment i tried to activate
the sensor using two car sidelight bulbs (switching them on and off at
various spacings) however i did not manage to fool it.Does anyone know why
this will
not work? Also (assuming i get around this problem )would an ir diode or
transistor put out the right frequency
of radiation to trigger the pir?
thanks in advance
BJ

Hi,

PIR detectors are specifically designed to ignore ordinary light and
everything but 'body heat' - long wave infarred.

Luhan

 

[bj]

"Luhan Monat" <luhanknows@yahoo.com> wrote in message
news:a4Rkb.58032$La.34982@fed1read02...

bj wrote:

hi
i am hoping to be able to switch on a pir sensed outside light
(before
entering its sensor field) using a key fob transmitter to actuate some
form
of ir transmitter which
which will then trigger the light.By way of experiment i tried to
activate
the sensor using two car sidelight bulbs (switching them on and off at
various spacings) however i did not manage to fool it.Does anyone know
why
this will
not work? Also (assuming i get around this problem )would an ir diode or
transistor put out the right frequency
of radiation to trigger the pir?
thanks in advance
BJ



Hi,

PIR detectors are specifically designed to ignore ordinary light and
everything but 'body heat' - long wave infarred.

Luhan

thanks for reply LUHAN

But even I can feel the heat given out by one of these bulbs and if I move
one accross the sensor it switches the light on. I was just hoping to be
able to trigger the sensor by switching two IR sources one after the other
to simulate motion

BJ

 

[Luhan Monat]

bj wrote:

"Luhan Monat" <luhanknows@yahoo.com> wrote in message
news:a4Rkb.58032$La.34982@fed1read02...

bj wrote:


hi
i am hoping to be able to switch on a pir sensed outside light

(before

entering its sensor field) using a key fob transmitter to actuate some

form

of ir transmitter which
which will then trigger the light.By way of experiment i tried to

activate

the sensor using two car sidelight bulbs (switching them on and off at
various spacings) however i did not manage to fool it.Does anyone know

why

this will
not work? Also (assuming i get around this problem )would an ir diode or
transistor put out the right frequency
of radiation to trigger the pir?
thanks in advance
BJ



Hi,

PIR detectors are specifically designed to ignore ordinary light and
everything but 'body heat' - long wave infarred.

Luhan


thanks for reply LUHAN
But even I can feel the heat given out by one of these bulbs and if I move
one accross the sensor it switches the light on. I was just hoping to be
able to trigger the sensor by switching two IR sources one after the other
to simulate motion

BJ

Yo,

That may work, its a matter of distance between your sources. The
devices are deviced into detection zones. The detection angle is about
10-30 degrees on the detectors. At 10 feet away, you need sources that
are a couple of feet apart. Even in the infarred range, the detectors
are designed to ignore changes in IR intensity - they only react to IR
sources that move from one zone to another.

Luhan