Alarm backup power from phone lines?
February 23rd, 2008 | by dnw |I came across this site called 5min.com. It’s a how-to style video sharing site with heaps of neat tricks and tips.
This video below got me thinking about emergency backup sources for such things as alarms etc. Watch it to the end.
http://www.5min.com/Video/How-to-Get-Free-Electricity-12198
Near the end where the tested light goes on when phone rings is an obvious kludge for those with hearing impairment. However to me it goes beyond the ‘free electricity from phone line’ and the kicker is that this power source could be used as backup for emergency call alarms, door openers etc.
Many years ago I used to sleep on an air mattress for pressure management (since replaced by the magic of a waterbed). The thing with that powered air mattress was if the mains power went off at night and stayed off while everyone was sleeping the bed would go flat and you’d have potential pressure area issues. I often thought of making a battery backed device tat sounded an alarm with power failure. The power source identified in the above video would have been the ideal thing for that application.
Maybe I should make one still, so if the power goes off I’ll be warned that my waterbed could go cold!
