While the Web is full of DIY electronics projects, few are useful as they are entertaining. That’s not the case with this one here, however — a laser tripwire alarm system, which can be used to secure ...
We may earn a commission from links on this page. Credit: René Ramos/Lifehacker/OsakaWayne Studios, Jackyenjoyphotography/Moment, luismmolina/iStock via Getty Images ...
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