What it is
The ShillehTek 3.5mm Stereo Audio Jack Breakout Board Pro Module is a compact AUX/TRS connector breakout that brings a 3.5mm stereo jack to easy-to-wire pins for Arduino, Raspberry Pi, and DIY audio prototyping—ideal for line-in/line-out experiments, sound-reactive builds, and clean audio routing without soldering directly to a tiny jack.
Pins
This module breaks out the standard stereo TRS connections: Left (L), Right (R), and Ground (GND). Some revisions may also include additional switch/detect pins—refer to the silkscreen labels on the board/module and the listing photos for exact pin names and which pads are populated.
Technical Specifications
| Item | Details |
|---|---|
| Connector type | 3.5mm stereo TRS (AUX) jack breakout |
| Breakout signals | Left, Right, Ground (extra switch pins vary by module revision) |
| Typical use | Audio input/output routing, line-in monitoring, quick prototyping |
| Compatibility | Arduino, Raspberry Pi, and general electronics audio projects |
| Pin labels / layout | See listing photos and board silkscreen (varies by module revision) |
Frequently Asked Questions
How do I wire a 3.5mm TRS stereo jack breakout to Arduino?
Connect the breakout's Left (L), Right (R), and Ground (GND) to your audio circuit as needed (e.g., into an amplifier or an ADC front-end). Use the board silkscreen and listing photos to confirm the exact pin names for your module revision.
Can I use this 3.5mm audio jack breakout with Raspberry Pi line-in or line-out?
Yes—this module is commonly used to bring an AUX/TRS connection to pins for Raspberry Pi and other SBC projects. Ensure your Pi setup supports the specific audio direction you want (input vs output) and route L/R/GND accordingly.
What are the extra pins on some 3.5mm jack breakout boards?
Some 3.5mm jacks include switch/detect contacts that change state when a plug is inserted. If your board has extra pads/pins, confirm their function using the module silkscreen and product photos before wiring them into a detect or mute circuit.
Is this breakout board suitable for sound-reactive or audio monitoring projects?
Yes—it’s designed for quick, reliable AUX wiring so you can route audio into your project (for example into an ADC stage) or out to an amplifier. The breakout simplifies prototyping and reduces strain compared to soldering directly on a tiny jack.