Explore innovative distance measurement methods for DIY projects. Learn about tools like UWB, barometers, and camera-based systems.

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Here is a simple-looking visual trick challenges your perception of two lines. What you see may surprise you, revealing how ...

Take tape measures, once a palm-sized object that housed a metal ribbon that could snap back enthusiastically -- has been transformed into a palm-sized device with with a laser inside. Yup, the ...