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Default low voltage PIR trigger setup for IP cctv cam

getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send a
signal to it to take a snap when something goes across the cam;s field of
view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not going
to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K
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Default low voltage PIR trigger setup for IP cctv cam

Jim K wrote:
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Normal 12V PIR detector?

--
Adam


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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 20:29:00 +0100, ARWadsworth
wrote:

Jim K wrote:
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Normal 12V PIR detector?


any recommendations?

cheers
Jim K
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Default low voltage PIR trigger setup for IP cctv cam

Use a std 15m quad pir with a pet lens (preferably as narrows vertical
field) then use masking tabs supplied to refine horizontal.
A std pir will be ok but quads are nearly as cheep and more reliable against
false alarming .
HTH
CJ

"Jim K" wrote in message news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send a
signal to it to take a snap when something goes across the cam;s field of
view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not going
to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K

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Default low voltage PIR trigger setup for IP cctv cam

On 28/05/2012 20:00, Jim K wrote:
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send
a signal to it to take a snap when something goes across the cam;s field
of view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not
going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Illuminator, reflector, and a photocell break beam detector?

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/


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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send a
signal to it to take a snap when something goes across the cam;s field of
view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not going
to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.

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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 22:09:03 +0100, Rod Speed
wrote:



"Jim K" wrote in message
news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the cam;s
field of view.

PIR would be perfect but a very narrow "beam" is required to make sure
I get the subject in the centre of the frame... and the IP cam is not
going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix tghus
unable to upload "better software" to....

thanks anyway Rodders

Jim K
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Default low voltage PIR trigger setup for IP cctv cam

Jim K wrote
Rod Speed wrote
Jim K wrote


getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.


One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the cam;s
field of view.


PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not
going to be happy with 240v up its I/O - so ???


low voltage PIR? what from where?


a normal 240v PIR and some sort of a relay?


something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix tghus
unable to upload "better software" to....


I meant run that on whatever you record the output to, not on them
themselves.

Much more elegant than farting around with a separate PIR with sticky tape
on it.

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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 23:41:11 +0100, Rod Speed
wrote:

Jim K wrote
Rod Speed wrote
Jim K wrote


getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.


One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.


PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???


low voltage PIR? what from where?


a normal 240v PIR and some sort of a relay?


something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix
tghus unable to upload "better software" to....


I meant run that on whatever you record the output to, not on them
themselves.


FFS your true colours come shining through again Rodders - JFG "IP camera"
will you.... ;)))))
then come back with any more dumb queries, so we can chuckle...

Jim K
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Default low voltage PIR trigger setup for IP cctv cam


"Jim K" wrote in message
news
On Mon, 28 May 2012 23:41:11 +0100, Rod Speed
wrote:

Jim K wrote
Rod Speed wrote
Jim K wrote


getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.


One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.


PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???


low voltage PIR? what from where?


a normal 240v PIR and some sort of a relay?


something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix
tghus unable to upload "better software" to....


I meant run that on whatever you record the output to, not on them
themselves.


FFS your true colours come shining through again Rodders - JFG "IP camera"
will you.... ;)))))
then come back with any more dumb queries, so we can chuckle...

Jim K


Steady Jim, you'll be plonked.
LMFAO




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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
On Mon, 28 May 2012 23:41:11 +0100, Rod Speed
wrote:

Jim K wrote
Rod Speed wrote
Jim K wrote


getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.


One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.


PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???


low voltage PIR? what from where?


a normal 240v PIR and some sort of a relay?


something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix
tghus unable to upload "better software" to....


I meant run that on whatever you record the output to, not on them
themselves.


FFS your true colours come shining through again Rodders


You're a terminal ****wit.

- JFG "IP camera" will you.... ;)))))


Don't need to, that refers to how the video gets back
to what you want to record/view it on, ****wit.

reams of your puerile **** any 2 year old could leave for dead flushed
where it belongs

Using some decent software on the image from the IP camera
makes a hell of a lot more sense than farting around with a
separate PIR and sticky tape, ****wit.

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Default low voltage PIR trigger setup for IP cctv cam


"Jim K" wrote in message
news
On Mon, 28 May 2012 23:41:11 +0100, Rod Speed
wrote:

Jim K wrote
Rod Speed wrote
Jim K wrote


getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.


One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.


PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???


low voltage PIR? what from where?


a normal 240v PIR and some sort of a relay?


something else?


Yeah, decent software that allows you to specify a subset of the
camera view to monitor for movement and is smart enough to
not be triggered by sunshine/shade changes due to small clouds
passing the sun etc.


mmm unlikely as the IP cams are firmware based, run on cut down unix
tghus unable to upload "better software" to....


I meant run that on whatever you record the output to, not on them
themselves.


FFS your true colours come shining through again Rodders - JFG "IP camera"
will you.... ;)))))
then come back with any more dumb queries, so we can chuckle...


Steady Jim, you'll be plonked.
LMFAO

(repost)


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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 20:00:48 +0100, Jim K wrote:

low voltage PIR? what from where?


As used with intruder alarm systems. Many to choose from...

a normal 240v PIR and some sort of a relay?


Some 240v PIRs operate relays rather than being solid state. Wether
the relay contacts are "volt free" is another matter...

On both adjust the area "seen" by the PIR with bits of sticky tape.

--
Cheers
Dave.



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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 22:25:15 +0100, Dave Liquorice
wrote:

On Mon, 28 May 2012 20:00:48 +0100, Jim K wrote:

low voltage PIR? what from where?


As used with intruder alarm systems. Many to choose from...


including ones rated for exterior usage?

a normal 240v PIR and some sort of a relay?


Some 240v PIRs operate relays rather than being solid state. Wether
the relay contacts are "volt free" is another matter...


precisement - which "some" are those though?

Jim K
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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 23:32:09 +0100, Jim K wrote:

As used with intruder alarm systems. Many to choose from...


including ones rated for exterior usage?


I don't recall "exterior" being in the spec. B-)

precisement - which "some" are those though?


An excerise for the readers googlabilty, one source:

http://www.gjd.co.uk/products/wired-detectors/

But you probably aren't going to like the price...

--
Cheers
Dave.





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On Tue, 29 May 2012 09:30:07 +0100, Dave Liquorice
wrote:

On Mon, 28 May 2012 23:32:09 +0100, Jim K wrote:

As used with intruder alarm systems. Many to choose from...


including ones rated for exterior usage?


I don't recall "exterior" being in the spec. B-)


point taken - i want an outside pir ;)
isn't there just some relay i can bung across a pirs switched output
(where the floodlight would usually go) and close the ip cams i/o circuit?
either momentarily or for the duration of how the pir is setup?
don't know just yet how the cam "wants it" but t'will be one or t'other

Jim K
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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K


Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.
--
Davey.
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Default low voltage PIR trigger setup for IP cctv cam

On Mon, 28 May 2012 23:36:52 +0100, Davey wrote:

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K


Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.


ZM also needs a PC running 24/7..

Jim K
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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
On Mon, 28 May 2012 23:36:52 +0100, Davey wrote:

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K


Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.


ZM also needs a PC running 24/7..


No big deal when that can be a dirt cheap obsolete laptop.

Leaves farting around with a separate PIR and sticky tape for dead,

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Default low voltage PIR trigger setup for IP cctv cam


"Rod Speed" wrote in message
...


"Jim K" wrote in message
news
On Mon, 28 May 2012 23:36:52 +0100, Davey wrote:

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K

Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.


ZM also needs a PC running 24/7..


No big deal when that can be a dirt cheap obsolete laptop.

Leaves farting around with a separate PIR and sticky tape for dead,


Corse it does.
LMFAO




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Default low voltage PIR trigger setup for IP cctv cam

On Tue, 29 May 2012 01:04:16 +0100, Rod Speed
wrote:



"Jim K" wrote in message
news
On Mon, 28 May 2012 23:36:52 +0100, Davey wrote:

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K

Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.


ZM also needs a PC running 24/7..


No big deal when that can be a dirt cheap obsolete laptop.


and is a ****ty bodgey backwards step Rodders solution....

no thanks

Jim K
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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
On Tue, 29 May 2012 01:04:16 +0100, Rod Speed
wrote:



"Jim K" wrote in message
news
On Mon, 28 May 2012 23:36:52 +0100, Davey wrote:

On Mon, 28 May 2012 20:00:48 +0100
"Jim K" wrote:

getting Pd off with motion detecing IP cams sending 100s of emails
of moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Cheers
Jim K

Zoneminder has very closely programmable Zones, to let you define
where you want something to trigger the alarm, and recording.
http://www.zoneminder.com/
No PIR, just the camera feed.
If this is way off track, apologies.

ZM also needs a PC running 24/7..


No big deal when that can be a dirt cheap obsolete laptop.


and is a ****ty bodgey backwards step


And farting around with a separate PIR and sticking tape aint ?

Yeah, right.

You're so stupid you cant even manage to pick a decent IP
camera that allows you to specify a subset of the image to
monitor for movement and one that's been designed toi
handle sunshine/shade changes.


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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send a
signal to it to take a snap when something goes across the cam;s field of
view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not going
to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Arbor disk in angle grinder or a chain saw.



There are IP cameras with built in PIR detectors.
They don't work through glass.

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On Tue, 29 May 2012 10:07:33 +0100, dennis@home
wrote:



"Jim K" wrote in message
news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the cam;s
field of view.

PIR would be perfect but a very narrow "beam" is required to make sure
I get the subject in the centre of the frame... and the IP cam is not
going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Arbor disk in angle grinder or a chain saw.


right..... "inspired & sectionable" Dennis rides in

There are IP cameras with built in PIR detectors.
They don't work through glass.


MMM I already have the cameras with I/O capability - I want to cobble up a
triggering method ...OK?

Jim K
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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
On Tue, 29 May 2012 10:07:33 +0100, dennis@home
wrote:



"Jim K" wrote in message
news
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the cam;s
field of view.

PIR would be perfect but a very narrow "beam" is required to make sure
I get the subject in the centre of the frame... and the IP cam is not
going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?


Arbor disk in angle grinder or a chain saw.


right..... "inspired & sectionable" Dennis rides in


So you don't want to remove the trees and shrubs you think are causing the
problem?


There are IP cameras with built in PIR detectors.
They don't work through glass.


MMM I already have the cameras with I/O capability - I want to cobble up a
triggering method ...OK?


New cameras might be cheaper and more reliable.
As might be a DVR



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Default low voltage PIR trigger setup for IP cctv cam

On Tue, 29 May 2012 20:56:35 +0100, dennis@home
wrote:



"Jim K" wrote in message
news
On Tue, 29 May 2012 10:07:33 +0100, dennis@home
wrote:



"Jim K" wrote in message
news getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to
send a signal to it to take a snap when something goes across the
cam;s field of view.

PIR would be perfect but a very narrow "beam" is required to make
sure I get the subject in the centre of the frame... and the IP cam
is not going to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?

a normal 240v PIR and some sort of a relay?

something else?

Arbor disk in angle grinder or a chain saw.


right..... "inspired & sectionable" Dennis rides in


So you don't want to remove the trees and shrubs you think are causing
the problem?


do you think it will work on clouds too?


There are IP cameras with built in PIR detectors.
They don't work through glass.


MMM I already have the cameras with I/O capability - I want to cobble
up a triggering method ...OK?


New cameras might be cheaper and more reliable.
As might be a DVR


might & might..... right thanks Dennis, back to bed with you.

Jim K
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Default low voltage PIR trigger setup for IP cctv cam



"Jim K" wrote in message
news
might & might..... right thanks Dennis, back to bed with you.


Shame, I was just going to post
http://www.toolstation.com/shop/Safe.../sd2759/p16489

You will need to protect it from rain by using an open fronted box.


Or you could use
http://www.toolstation.com/shop/Safe.../sd2759/p93261
and a 12v supply and/or relay.

Like I said a new camera may be cheaper
http://www.networkwebcams.co.uk/prod...roducts_id=753 in the long
run.

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Posts: 22
Default low voltage PIR trigger setup for IP cctv cam

Jim K wrote:
getting Pd off with motion detecing IP cams sending 100s of emails of
moving bushes and sunshine/shade changes.

One of the IP cams has 2 channels for I/O - so I'm pondering how to send a
signal to it to take a snap when something goes across the cam;s field of
view.

PIR would be perfect but a very narrow "beam" is required to make sure I
get the subject in the centre of the frame... and the IP cam is not going
to be happy with 240v up its I/O - so ???

low voltage PIR? what from where?


Somewhere which sells parts for intruder/burglar alarms would be the obvious
place to start looking.

Most likely the 240v unit actually consists of a relay, cheap PSU and a low
voltage unit anyway.
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