PromptPen

Devlog 4: Components. Today, I continued developing the 3D CAD model of the PromptPen and made substantial progress toward creating a realistic prototype. Building upon the pen enclosure that I previously designed, I began integrating several of the actual electronic components into the model. I added a representation of the INMP441 MEMS microphone, which will be responsible for capturing voice input from the user, and carefully positioned it within the housing to ensure it would have a clear opening for sound detection. I also incorporated the push button that will be used to activate voice recording and interact with the device, placing it in a location that is easily accessible while maintaining the ergonomics of the pen.In addition, I modeled and positioned the OLED display that will present AI-generated responses to the user. This required ensuring that the display aligned properly with the viewing window on the exterior of the pen so that information can be read clearly. I also added the charging module and began planning how it will connect to the battery and other electronics while fitting within the limited internal space available. Throughout the modeling process, I evaluated component spacing, orientation, and accessibility to ensure that all parts could coexist within the enclosure without interference.

Devlog 3: Lots of progress on 3d Model! Today, I made significant progress on the mechanical design of the PromptPen by beginning the development of the three-dimensional CAD model. I started by creating a basic pen-shaped enclosure in Fusion 360 that accurately represented the overall size and form factor of the final device. This initial model established the exterior dimensions of the pen and provided a foundation for integrating the electronic components. After completing the outer shell, I modified the design by creating internal cavities and cutouts to accommodate the major hardware components required for the project. These included designated spaces for the ESP32-S3 microcontroller, LiPo battery, OLED display, microphone, charging module, and supporting circuitry.Throughout the modeling process, I carefully considered component placement to maximize the limited internal space while maintaining the appearance and ergonomics of a standard pen. I carved out specific regions within the enclosure to ensure that each component would fit properly and remain accessible for assembly and maintenance. In addition, I evaluated how the placement of components would affect wiring, power distribution, and overall functionality. The CAD model also helped identify potential design constraints and allowed me to make adjustments before moving into the prototyping stage. By creating a detailed digital representation of the device, I was able to better visualize the final product and confirm that the internal electronics could be successfully integrated into the pen-shaped housing. This progress marks an important milestone in the PromptPen development process, as it transitions the project from conceptual sketches and planning into a realistic and manufacturable engineering design.

Devlog 2: Sketches
Today, I continued the design and planning process for the PromptPen prototype by creating a series of dimensioned engineering sketches to establish the physical layout of the device. I developed a general top-view drawing to determine the overall length, width, and placement of the major internal components. This sketch helped visualize how the ESP32-S3 microcontroller, LiPo battery, OLED display, microphone, and other electronics would fit within the limited space available inside the pen housing.I also created a detailed side-view sketch of the PromptPen to define the external appearance and identify the locations of user-facing features. In this drawing, I planned the placement of the OLED display window, voice activation button, microphone opening, and USB-C charging port. The side view allowed me to evaluate spacing between components and ensure that the design would remain ergonomic and comfortable to hold while still accommodating all required hardware.Additionally, I produced a top-view sketch that specifically incorporated the power switch and its location within the design. This drawing helped determine how the power switch would be accessed by the user while minimizing accidental activation during normal use.

Worked on the 3d Model today
Today, I began the design and planning phase of the NeuraPen prototype. I researched the hardware components required for the device and finalized a bill of materials, including the ESP32-S3 microcontroller, OLED display, INMP441 microphone, rechargeable LiPo battery, charging module, and other supporting electronics. I also developed the overall system architecture, determining how the pen will communicate with a smartphone via Bluetooth to process voice input and display AI-generated responses.

In addition, I worked on the mechanical design of the device by creating preliminary CAD concepts for the pen housing and internal component layout. I planned the placement of major components, including the display, microphone, battery, and charging port, while considering size constraints and portability. Im hoping to get more comfortable with fusion so I can get these designs in quickly!