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 ...

Aqara’s smart light switch looks good, works well, and is compatible with Alexa, Apple HomeKit, and Google Home, but you’ll need to go all-in on Aqara’s ecosystem—which doesn’t include a smart ...

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This ON OFF touch switch circuit is based on the well known timer IC 555 (IC1), which drives a relay that acts like a switch. The metal surfaces can have what form we want, but it should be clean and ...