I've recently posted a tutorial about this project on YouTube. You can watch it here or, if you prefer, you can read a blog post about it.
This project is a 3D-printed Bluetooth speaker that you can build at home. The enclosure was designed in Fusion 360 and 3D-printed, while the electronics include a Bluetooth amplifier module, speakers, and a rechargeable battery system. The enclosure is hand-painted to achieve a stunning wood-like finish.
- Bluetooth connectivity
- Infrared remote control & physical buttons
- Rechargeable battery-powered
- 3D-printed enclosure with wood-like finish
- Dual 5W speakers & passive bass radiators for enhanced sound
After experimenting with different materials like PVC and MDF, 3D printing was chosen for its precision, flexibility, and ease of customization. It allows for a lightweight, compact, and aesthetically pleasing enclosure without requiring woodworking tools.
Here's the schematics of this project.
- Bluetooth + Amplifier Module: Kebidu 5W (supports Bluetooth, FM radio, SD cards, USB drives, and infrared remote control)
- Speakers: 5W, 4-ohm, 40mm diameter (generic)
- Battery: Two 18650 Li-Po batteries connected in parallel
- Charger Module: TP4056 USB-C module
- Passive Radiators: 66mm passive bass radiators
- 2x 3mm LEDs (power & charge indicators)
- Super glue
- 2mm EVA foam sheets (for sound insulation)
- Paints & brushes (for finishing)
- Redesigned the back panel for durability.
- Adjusted screw placements for better assembly.
- Ensured proper airflow and sealing for sound optimization.
- Replaced built-in LEDs with external 3mm LEDs for visibility.
- Connected batteries to TP4056 charger module.
- Wired the amplifier module and Bluetooth module.
- Soldered speakers and passive radiators for enhanced bass.
- Spray paint with caramel-colored base coat.
- Use Copic Ink Refills to create a realistic wood grain texture.
- Lined the interior with 2mm EVA foam sheets to reduce vibrations.
- Carefully placed and secured all components inside the 3D-printed enclosure.
- Sealed the speaker to prevent air leaks and maximize bass response.
- Passive Radiator Optimization: The chosen radiators were too heavy for the small speakers. Future designs will incorporate better-matched radiators based on software calculations.
- Structural Adjustments: The original back panel broke under pressure, requiring a redesign.
- Painting Techniques: Using Copic Inks on 3D prints resulted in a realistic wood finish, improving aesthetics dramatically.
- Premium-looking speaker with a custom wood finish.
- Great sound quality, although further improvements can be made to the bass response.
- A fun and rewarding project that enhances 3D design and electronics skills.
- Download the STL files from this repository.
- Print the parts using your 3D printer or an online printing service.
- Gather the electronic components (see the full list above).
- Follow the wiring diagram and solder the connections.
- Paint and assemble the enclosure.
- Enjoy your custom Bluetooth speaker!
- /files/ - 3D printable files for the enclosure.
- /photos/schematics.png - Wiring diagrams for the electronics.
- Better passive radiator selection based on tuning frequency calculations.
- Customizable enclosure options, such as different sizes or shapes.
- Inspired by various DIY Bluetooth speaker projects.
- Special thanks to Off Earth for the wood texture painting technique.
If you enjoyed this project, consider subscribing to my YouTube channel for more DIY electronics builds! 🚀