Servo operated light switch cover.
thingiverse
https://youtu.be/G6LYws4liJE This design is for a light switch cover which houses an MG90s-sized servo, and a servo horn for the purposes of operating electronically an existing light switch. The servo, of course, needs to be coupled with an operating circuit of your choosing, as well as a power supply. The servo horn has no splines, and thus is a "press-fit", but I had decent success with my copy, and little or no slippage with screw installed.
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