Planetary Gear Light Switch Cover

Accessorize the light switches at your home or office with this intriguing mechanism that utilizes a planetary gear! All parts can be 3D printed (no supports are required), and the design is fully snap together - so no glue is needed. I printed the five gears as a unit (using the attached “Planetary Gears.stl” file), which shows their proper orientation for assembly. But, if you'd rather print the gears independently (or are worried that a roughly .2 mm gap tolerance between the gears may cause an issue on your printer), then an individual STL is provided for each gear as well. I designed this model from scratch for the “Office Accessories” here on Printables, but I want to call out “Engineer Dog” who showed off a similar idea several years ago. Some notes on assembly follow: Step #1: Place the gears on the base plate in the orientation shown below, and note that the “planet gears” do have a right-side-up (due to the use of a double-helix gear style, which is part of what helps the entire piece hold together without needing additional brackets): Step #2: Place the rocker arm over its pivot point, with the long part of the arm facing towards the bottom of the plate: Step #3: Swing the rocker arm around and gently lift it over the top of the actuator peg on the sun gear: Step #4: Press the three gear nuts through the planetary gears until they snap into the other side of the base plate: Step #5: Unscrew your original light switch plate cover, and then attach your new planetary gear light switch cover using the same screws from the original: