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