Or you can go back to basics and build this reflective RGB sensor from an LED ... a photocell. The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ...
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The Best Motion Sensor Lights of 2024Manually switch the lamp on and off or set the built-in photocell ... Sengled Smartsense Outdoor LED Motion Sensor Bulbs that simply screw right into your home's existing light fixtures.
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