Affordable home alarm

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(28 June 2013, 11:28)Skean Dhude Wrote: I'd want to ensure that the only thing my alarm needs is power. You will want it after an event as well as before.

This threat has made me think though. After an event many alarms will be going off as houses are raided. Battery backup lasts for a while as the alarms are timed. The noise from several of these would cover up you defending your home and thinning the herd.

Another consideration SD:

After all the noise has died down after an event it is useful to be able to disable the siren on any system that you keep operational as its going off when everyone else has lost all power will draw unwanted attention.