This project describes how I used an Arduino, motor controller and linear actuators to allow automatic opening and closing of a pair of doors (secret doors; secret bookcase doors!). The bookcases were hand made to support fully loaded shelves and have a unique hinge and slide mechanism so the bookcases look like they are resting against the outside wall. To open, they slide apart slightly, and pivot inward into the ‘secret lair’ and then slide outward so as to not block too much space inside. This part of the project is described in my first Instructable.
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