Jack <> Bluetooth Converter

Revision 3.1 (Not manufactured yet) :

Revision 3.0 (Manufactured) :

Table of Content

1. Features
2. Design Specificatin and documentation
3. Repo organization
4. Next steps
5. Revision history

1. Features

This project aims to design a device with the following features:

• Audio input from a 2.5mm audio jack can be sampled and transmitted via Bluetooth to a headphone.
• Digital audio from a smartphone can be received via Bluetooth and converted into analog audio through a 3.5mm audio jack.
• The device can be powered via USB-C or run on battery for up to 3 hours.
• The battery charges when the device is connected to USB-C.
• A screen and buttons allow switching between "Jack to Bluetooth" and "Bluetooth to Jack" modes.
• The screen and buttons enable Bluetooth peripheral selection when the device functions as a Bluetooth central.
• The screen turns off after 1 minute of inactivity to save power.

2. Design specification and documentation

Please go to Jack <> Bluetooth Design Specification which documents the design choices and provide details on the project.

Software Readme contains note taking from the software development (work in progress).

3. Repo organization

./Components -> components list with libs (not public)

./doc -> documentations, specifications and images

./gerber -> pcb design files for manufacturing

./kicad -> Kicad files

./software -> ESP32 C code (work in progress)

4. Next steps

• Working on a new revision : Rev3.1 to fix the current hardware limitations

5. Revisions history

Please go to Jack<>Bluetooth-Revision-History