Overview
The MX9B1 – 3.5 MM Audio Female Jack Breakout Module provides a simple and reliable way to connect 3.5 mm audio plugs to electronic projects. The module exposes Left, Right, Ground, and switch contacts via standard 2.54 mm header pins, making it ideal for breadboard prototyping, audio experimentation, and embedded audio applications.
Key Features
- Standard 3.5 mm female audio jack breakout
- Breaks out Left (L), Right (R), and Ground (GND) audio signals
- Includes jack switch pins (LSW, RSW) for plug detection or signal routing
- Clearly labeled silkscreen for easy wiring
- Standard 2.54 mm pin header footprint
- Compact, breadboard-friendly PCB design
Applications
- Audio input/output interfacing for microcontroller projects
- DIY audio amplifiers and mixers
- Headphone and speaker breakout testing
- Audio signal monitoring and routing
- Plug-in detection for embedded systems
- Rapid prototyping of audio circuits
- Amplifier Kits
Purchase Link
Download Gerber files here: MX9B1 – 3.5 MM Audio Female Jack Breakout Module
Pinout Description
Pin | Label | Function |
1 | L | Left channel audio signal |
2 | GND | Ground reference |
3 | R | Right channel audio signal |
4 | LSW | Left channel switch contact (connected/disconnected on plug insertion) |
5 | RSW | Right channel switch contact (connected/disconnected on plug insertion) |
Note: LSW and RSW can be used for jack-insert detection or automatic signal switching applications.
Schematic Diagram
PCB Layout & Dimensions
Parameter | Value |
Board Size | 24 mm × 18 mm |
Layers | 2 |
Components Placement | Top layer (Single side) |
Pin Pitch | 2.54 mm |
Audio Connector | 3.5 mm Female Jack |
Revision History
Date | Version | Modify Content |
03/02/2026 | Rev 1.0 | New |
Get you Datasheet in PDF
3.5 MM Audio Female Jack Breakout Module MX9B1
Original price was: ₹999.00.₹199.00Current price is: ₹199.00.
3.5 mm Audio Female Jack Breakout Module – MX9B1 for DIY electronics and audio projects. Breaks out Left, Right, Ground, and switch pins to 2.54 mm headers. Ideal for breadboards, Arduino, ESP32, and audio prototyping and amplifier kits.
Description
Disclaimer (Digital Product)
This product is a digital production pack, not a physical or assembled PCB. You will receive Gerber files, BOM, Schematics and documentation required to manufacture the PCB Module. No physical boards are shipped.
Download Product Datasheet: Download Now
Overview
The 3.5 MM Audio Female Jack Breakout Module MX9B1 is a compact and breadboard-friendly PCB designed to simplify audio interfacing in electronic projects. It converts a standard 3.5 mm stereo audio jack into clearly labeled 2.54 mm header pins, allowing quick and reliable connections to microcontrollers, amplifiers, and audio circuits.
This module breaks out the Left (L) and Right (R) audio channels along with Ground (GND), making it ideal for stereo audio input or output applications. In addition, the onboard switch pins (LSW and RSW) enable plug-in detection and automatic signal routing, useful for smart audio switching and embedded system control.
With its compact footprint and standard pin spacing, the MX9B1 is perfect for breadboard prototyping, DIY audio projects, and educational use. Whether you’re building an audio amplifier, testing headphone outputs, or adding audio capability to an Arduino or ESP32 project, this breakout module offers a simple and reliable solution.
What You Will Receive (Digital Download)
This product pack will include:
- PCB Gerber File
- Bill of Materials (BOM)
- Pick and Place (CPL)
- Full product datasheet
- Documentation pack (README, License, T&C)
These files can be directly uploaded to PCB manufacturers such as JLCPCB, PCBWay and other manufacturers for fabrication.
Pinout Description
| Pin | Label | Function |
| 1 | L | Left channel audio signal |
| 2 | GND | Ground reference |
| 3 | R | Right channel audio signal |
| 4 | LSW | Left channel switch contact (connected/disconnected on plug insertion) |
| 5 | RSW | Right channel switch contact (connected/disconnected on plug insertion) |
PCB Layout & Dimensions
| Parameter | Value |
| Board Size | 24 mm × 18 mm |
| Layers | 2 |
| Components Placement | Top layer (Single side) |
| Pin Pitch | 2.54 mm |
| Audio Connector | 3.5 mm Female Jack |
Madhesh Ram K –
This breakout is not just for breadboard, I use this in amplifiers and speakers I build.