(26 March 2013, 09:42)Skean Dhude Wrote: (25 March 2013, 21:04)Lightspeed Wrote: SD using the CTCSS or DCS codes on the radios transmitting will greatly reduce the risk of false alarms.
Using the remote pressure sensor mats on long lengths of feeder wire will allow the radio to be remoted into a hidden location away from prying eyes.
Granted that power consumption has to be offset by PV type charging.
LS
Hi SD,
I agree that an 12v powered alarm system would be a good solution. (as I suggested at the outset) It still need to get power from somewhere though, and if wireless that will be two power sources to find.
The PMR solution is intriguing as it allows that device/system to perform a secondary roll with minimal adaption. Plug in Pressure pad mat £10 on e-bay see http://www.ebay.co.uk/itm/Pressure-Mat-S...vi-content
Another self contained 9v powered possible solution for £ 15 could be: http://www.thekidswindow.co.uk/selling.a...zQodT34A_g
LS
LS,
I'm not saying there isn't a way to make things easier. However I can wire a wide area cheaply using a wireless alarm system that uses little power rather than making an expensive alarm system that only really adds one benefit. I can talk to the intruder.
There is an old saving that we preppers need to remember Keep It Simple. Complicating things with pressure pads, solar chargers, CTS imo is not worth it.
OOps, typed that reply in the wrong area :-(
Re CTS imo is not worth it. Why not?
CTCSS give a less than 1 in 300 chance of getting false alarms. Using DCS its less than 1 in 800 chance of false alarms. And that's using bog standard PMR446 technology.
Its not perfect, but not bad for adapted technology
To improve the odds further, using a pair of the little Chinese handhelds, false alarm probability decreases to less than 1 in 1.5 million
Just sayin'....
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