http://feeds.gawker.com/~r/lifehacker/full/~3/y8TbyGmXk3s/build-a-trip-wire-alarm-from-parts-you-have-in-the-hous-1787228433

If you ever feel the need to make your own salvaged part trip wire alarm, it turns out it’s a pretty easy process. Over on YouTube, Node walks you through it.

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