Here’s a great ‘because I can’ style hack for a light switch
Will Donaldson has whipped up a quick hack…This remote switch utilizes a sg90 servo, an Arduino Uno, as well as pairs of ATtiny85s with HC-05 Bluetooth modules set up on protoboards. The 3D printed install screws quickly on top of a basic light switch cover while still enabling the switch to be flipped the old-fashioned way.
Check out this tutorial to develop your own (spotted on Hackaday)
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