Chapter 1: Finalizing the Electronics

In the first part of our project, we focused on assembling and testing the electronic components. Now, we will shift our attention to designing and 3D printing a box using Fusion 360 to house these components. This box will feature a hinge mechanism that triggers a song to play upon opening.

The initial step in ensuring everything fits nicely was to order all necessary parts and solder them onto a circuit board. Our design aims for a three-tier structure: the battery at the base, the PCB with components in the middle, and the music box on top. Gradually, I soldered the components onto the PCB, reconnecting everything in a more organized manner, making it easier to place them into the box.

Section 1.1: Designing the Box in Fusion 360

To kick off the design process, I meticulously measured each component and created a 3D model in Fusion 360. This gave me a clear understanding of the dimensions and how to integrate all elements into the box.

I began creating a box that would securely hold the board using four screws. Additionally, I designed a switch mechanism that only plays music when the box is opened. I also included brackets for a plate inside the box, which will hold the speaker. My plan was to print this plate in transparent plastic, allowing me to incorporate an LED that would illuminate through it.

Section 1.2: Adding Functional Features

As shown in the design, I integrated a hinge that can be 3D printed, requiring only two M2 screws to attach the lid. Fusion 360 allows for a direct simulation of the hinge function, letting me visualize how far the lid can open and ensuring there are no potential issues before printing.

Chapter 2: Final Assembly of the Box

After completing the prints, the next phase is to position the electronics within their designated spots and assemble the box fully. The end result is an engaging advent calendar that plays a new MP3 file each day upon opening.

This project invites you to unleash your creativity. You can choose to play various songs or, for a more personal touch, record your own audio. For instance, consider narrating a Christmas story and splitting it into 24 chapters for your child to enjoy each day leading up to Christmas.

The first video title is "2021 Electronic Sound Advent Calendar Breadboard Kit - day 24 - YouTube." This video showcases the assembly of an electronic sound kit that makes for a fun and festive project.

The second video title is "Synthesizer Advent Calendar - Build your own music synthesizer over 24 days - YouTube." This video guides you through creating your own synthesizer, perfect for music enthusiasts looking to enhance their holiday experience.