O&O: A DIY toolkit for designing and rapid prototyping olfactory interfaces

Title of the Paper

O&O: A DIY toolkit for designing and rapid prototyping olfactory interfaces

Paper Information

• Field of Study: Interaction technology and rapid prototyping, with a focus on olfactory interfaces
• Keywords: Olfactory interface, olfactory display, cardboard toolkit, design thinking, rapid prototyping

Research Background and Problems

• Problems and Challenges:
  • The construction of current olfactory interfaces requires advanced design expertise and significant engineering efforts.
  • There is a lack of accessible tools to reduce design complexity, hindering research and innovation.
  • Commercial olfactory display devices are not easily accessible, often expensive, limited in variety, and do not support customization.
  • The open-source community in the field of olfactory interfaces is relatively small, with many studies lacking detailed design guidelines, making replication and improvement difficult for novices and researchers.
• Significance:
  • Olfaction inherently evokes emotions and memories, influences behavior and cognition, and has the potential to create new applications through integration with human-computer interaction (HCI).
• Research Motivation:
  • To design an open-source, low-barrier toolkit that lowers the technical threshold for constructing olfactory interfaces and attracts more users to the field.
  • To provide experimental and creative space for interaction design researchers and general users from various disciplines.

Solution

• Methods and Tools:
  • This paper proposes a DIY toolkit for olfactory interaction named O&O (Open-source & Olfaction), which primarily includes:
    1. Scent Generation Components: Offering multiple electronic modules to support three types of scent evaporation technologies (ultrasonic atomization, heating, fan or air pump).
    2. Module Construction Components: Cardboard modules for assembling variable functional structures.
    3. Design Manual: A design-thinking framework guiding users through the entire process from motivation design to prototype construction.
• Innovations:
  • Provides a low-cost open-source solution.
  • Simplifies traditional complex hardware development into modular plug-and-play designs.
  • Integrates a design manual to help non-professional users gradually achieve innovative olfactory interfaces.
• Implementation Steps and Techniques:
  • Supports multiple scent sources, including liquids, solids, and powders, with modular designs adaptable to different interaction scenarios.
  • Offers detailed guidance for each module design, using user-friendly hardware and software interfaces (e.g., Arduino).
  • Explores spatial and temporal characteristics in olfactory experience design.

Research Results

• Key Findings:
  • Introduced a beginner-friendly toolkit for designing and rapid prototyping olfactory interfaces.
  • Demonstrated the toolkit's usability and versatility through five example designs, including a scent mask and an olfactory notification watch.
  • In formal workshops and DIY activities, 19 participants and 4 individual testers successfully completed rapid construction processes for olfactory interfaces despite having no prior experience.
• Advantages:
  • Reduced the technical threshold for developing olfactory interfaces.
  • Opened up olfactory interaction to broader audiences, encouraging interdisciplinary participation.
  • Modular design offers scalability and flexibility.
• Experiments and Evaluations:
  • Workshop Experiment: Participants designed six diverse olfactory prototypes (e.g., "olfactory piano"). The toolkit received an overall rating of 4.1/5, demonstrating its efficiency in facilitating rapid olfactory interface construction.
  • DIY Individual Experiment: Longer independent experiment times allowed participants to design more complex creations, including game-based or emotion-driven olfactory display devices, further proving the toolkit's adaptability.
• Limitations:
  1. Certain modules and functionalities remain underutilized (e.g., temperature control module).
  2. Cardboard used in DIY processes is prone to damage and may absorb scents, limiting long-term use.
  3. Hardware programming remains challenging for non-programmer users and requires further simplification.
• Future Directions:
  • Optimize hardware and software for greater ease of use:
    • Develop graphical programming software to simplify development for non-professional users.
    • Provide more prototype construction video tutorials and application cases.
  • Explore alternative materials to replace cardboard, such as foam boards, lightweight clay, or fabrics.
  • Promote the toolkit in STEM education to help young learners understand scent-related knowledge.