In message
,
Matty F writes
Does anyone have any brilliant ideas about how a security guard can be
notified when sensor lights turn on? The lights may be up to a mile
away so he can't necessarily see when they turn on.
The guard will be walking around, so there will have to be
notification via radio or cellphone or pager etc.
Ideally it would be helpful for him to know which lights went on.
When notified, he can go somewhere to look at a screen. Or he could
have a laptop computer using WiFi that can show whatever he needs to
see.
I was thinking that each sensor light could have a signal wire from
the supply to the bulb or from the relay, to a central point.
Complications are that he may set off sensor lights as he is walking
around, and cats etc may set them off. So, lots of false negatives
which he must be able to discount.


Not cheap but how about a radio transmitter at each location, connected
via your relay, each one transmits an individual code which is then
received on a portable carried by the guard.

I've put in a number of similar systems, some transmitting pre-recorded
speech idents. You can also use the guards radio to turn lights /
sounders on/off etc.



Off the shelf paging systems are available from Scope.

http://www.scope-uk.com/

Zetron produce voice announcers but these would require radio
transmitters interfacing to them.

http://www.zetron.co.uk/data/site/templates/splash.asp

http://www.zetron.co.uk/data/site/te....asp?area_0=pa
ges/menus/remotemonitoringprod&area_1=pages/products/monitoring/m1516




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Bill