November 13, 2013 Add as a preferred source on Google Add as a preferred source on Google In the video above, MAKE Magazine shows how to create your own laser tripwire for just a few dollars worth of ...
October 29, 2015 Add as a preferred source on Google Add as a preferred source on Google Worried someone might intrude on your evil lair? This DIY sonic tripware alarm is easy to build, decently loud, ...
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