Recently an ad on YouTube about an acoustic light sensor/switch module piqued my interest. Out of curiosity, I contacted the online vendor and bought a pair. Named MR-SK50A, the module is less popular ...

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A pint-sized sensor promises fewer stumbles and calmer bedtimes, quietly automating lights where you most need a gentle glow. IKEA’s VALLHORN motion sensor arrives at just £7, aiming to make busy ...

Light sensors often use an infrared LED as a light source. Infrared LEDs have a greater intensity than LEDs that emit visible light. And when infrared photodiodes are used the sensors are relatively ...