This rotating light switch has a dimmer function and was designed as part of theTPD4127-Design 4 course, which focuses on materials and production. It is made by injection molded plastic and uses magnets to make the interaction satisfying.
The switch is off when fully closed and gradually increases the power of the light when turned until it reaches the maximum light power at 180 degrees. It can be turned from either direction, left or right.
Upon opening, a transparent plastic sheet is revealed that reflects the ambient light in the room. The switch is designed with a slightly offset axis, allowing the plastic sheet to remain visible at all times when the switch is not fully closed. This also enables clear differentiation between the fully on and off positions. Additionally, the top right edge of the switch is painted white to provide a visual cue on how to interact with the object.
My main priority during the design process was to create an engaging and satisfying user experience while ensuring that the product remained functional.
Initially,I wanted the switch to trigger a mechanical movement that would continue on its own after being released, but due to resource limitations, this proved to be too difficult. As an alternative, I incorporated magnets into the design to create a snap-action mechanism that provides resistance and tactile feedback in both fully on and off positions. To ensure a satisfying user experience, I also spent time searching for a suitable potentiometer with a rotation mechanism that provided the desired level of resistance and haptic feedback. Ultimately,I found one that provides a satisfying ticking sound during rotation.
One of the key challenges in this project was designing the light switch in a way that met the requirements for injection molding, while also creating a 3D-printed prototype that accurately demonstrated the switch’s interaction and the various snaps needed for mass production. Additionally, the switch needed to fit a replaceable battery, a circuit board and the potentiometer.
To address these challenges, I printed each piece separately and iterated trough different sizes and snap designs to ensure everything fit together as desired. This approach allowed me to test the switch’s functionality without having to print the entire assembly multiple times, saving time and materials.
To address these challenges, I printed each piece separately and iterated trough different sizes and snap designs to ensure everything fit together as desired. This approach allowed me to test the switch’s functionality without having to print the entire assembly multiple times, saving time and materials.
Reflecting on this project, I gained valuable experience in the technicalities of injection molding and enjoyed exploring an unconventional approach to designing a light switch. If I were to continue working on this project, my first step would be to investigate whether it’s possible to reduce the switch’s height. Additionally, I would explore different ways of providing visual cues for how to interact with the switch, as I feel that the current white paint doesn’t quite meet my standards.