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What Your Wrist Sensor Actually Sees: How a PPG Sensor in a Smartwatch Works
Turn your smartwatch over and press it against a dark surface. You will see flickering green and red lights through the back cover. Those lights ar...
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What Your Wrist Sensor Actually Sees: How a PPG Sensor in a…
Turn your smartwatch over and press it against a dark surface. You will see flickering green and red lights through t...
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