Hair protects your skin and can renew itself without scarring. A hair has a follicle below the skin, made of live cells, and a shaft above the skin made of dead cells. Hair grows through three phases: ...
Now for generating the Ultrasound wave, we have to set the trigPin on HIGH State for 10 µs. Using the pulseIn () function you have to read the travel time and put that value into the variable ...
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