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A DIY trip wire alarm is any type of cordage connected to something that makes noise, alerting you to the presence of an intruder.

One man created a trip-wire alarm out of just a few items found in his junk drawer, and when triggered it can set stuff on fire!

If you're camping or buggin out it only makes sense to setup a perimeter. Who doesn't appreciate a good night of sleep. This isn't just a "post-collapse" idea. We've all heard horror stories of bears ransacking campsites while campers are present. Picking up a few magnetic battery operated widow alarms and attaching them to trip wire could mean you have early warning of an intruder in your campsite. And if it's just a wild animal and not a gang of marauders the high pitch 140db alarm…

A tripwire is a mechanical or electrical device. Generally, it's used in weaponry. Soldiers use them in war to cause an enemy to fall, and sometimes, to trip a mine. However, they can also be used for less nefarious purposes. For instance,...

Making a tripwire alarm system is easier than it seems at a first glance and it will notify you in case there is an emergency or an intruder near you.

One man created a trip-wire alarm out of just a few items found in his junk drawer, and when triggered it can set stuff on fire!

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These alarms are legal in all 50 states, even California. Each alarm features a spring loaded firing pin held back by a cotter pin that can be tied to a piece of string. The alarms can fire any 12 gauge shell or mini-blank.

Many viewers erroneously assumed these alarms could be used as a booby trap. While that would not only be illegal, it would also be highly ineffective.