We frequently get home automation tips, many of which have simple circuit-based on/off control for lights. [Paulo Borges] has created something quite different, however, with his in-the-wall servo-controlled light switch. This build forgoes the need of any relay to switch mains power, and because it’s physically flipping your switch, provides a distinct advantage over other builds that require a phone or tablet interface: you can use your switches as you normally would.
[Paulo] picked up a rocker-type switch at the local hardware store and carefully pried off the large, flat switch plate to notch out a small hole at its fulcrum. He then carefully shaped a piece of 12 gauge wire to provide a pivot point for the servo. His choice to use wire here seems to be entirely to provide a sturdy yet bendable component that functions mechanically rather than electrically. A small 9G servo fits to the back of the switch’s housing, and the servo’s arm connects up to the previously attached 12 gauge wire. He pieced together the remote control feature with an RF link kit with an inexpensive 433mhz Code duplicator from eBay.
[Paulo] explains that his Instructable is simply an overview rather than a step-by-step guide, so if you’re eager to reproduce this hack you’ll have to work out the code and the remote control portion yourself. He also acknowledges the biggest remaining hurdle: finding space in the wall to shove all the microcontroller guts. Check out a couple of videos of the switch after the break, and remember, there’s always the option of doing away with all light switches.