Audio Multiplexer
RICCIARDI-Adrien·Audio_Multiplexer·Hardware/Audio_Multiplexer.kicad_pcb
About the Audio Multiplexer PCB
Audio Multiplexer is an open source PCB design by RICCIARDI-Adrien, published on GitHub under the MIT license. It is a 2-layer board measuring 146 × 40 mm, with 10 components from 2 distinct parts.
By type, the board carries 7 connectors and 3 switches.
It belongs with the audio designs in this gallery.
From the project
A simple and fully passive audio source and microphone source multiplexer.
A simple passive multiplexer providing : two 3.5mm jack inputs connected to two PC line outputs, two 3.5mm jack outputs connected to active speakers and a headset, one 3.5mm jack input connected to the headset microphone, two 3.5mm jack outputs connected to two PC microphone inputs.
The multiplexer microphone input is designed to be driven separately in case this is needed later.

Audio Multiplexer bill of materials (BOM)
10 components, 2 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 7 | FC68131 | FC68131 | J1, J2, J3, J4, J5, J6, J7 |
| 3 | 7301SYZQE | 7301SYZQE | SW1, SW2, SW3 |
Audio Multiplexer design files
The KiCad project lives in the RICCIARDI-Adrien/Audio_Multiplexer repository on GitHub; these links point at the commit this page was built from.
Audio Multiplexer: common questions
How big is the Audio Multiplexer PCB?
The Audio Multiplexer measures 146 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Audio Multiplexer?
10 components, from 2 distinct parts. The full bill of materials is listed on this page.
Where can I download the Audio Multiplexer design files?
From the RICCIARDI-Adrien/Audio_Multiplexer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Audio Multiplexer design in my own project?
Yes, under the terms of its MIT license, which RICCIARDI-Adrien chose for the repository.
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