Adafruit TRRS Jack Breakout Board

The Adafruit TRRS Jack Breakout Board provides easy access to all four contacts of a 3.5mm TRRS (Tip-Ring-Ring-Sleeve) audio jack — commonly used for stereo audio plus a microphone channel, as found on mobile phone headsets. It's also handy when you want to repurpose standard audio cables for low-speed data transmission with power, ground, and two data lines.

In addition to the four main contacts, the breakout includes two switched outputs that let you detect when a plug is inserted or automatically switch between a built-in speaker and headphones.

Key Features

• 4-Contact TRRS Breakout – Access to Tip, Ring 1, Ring 2, and Sleeve connections
• Two Switched Outputs – Left and right switch pins connect to their respective contacts when no jack is inserted, and float when a plug is inserted
• Insertion Detection – Use the switch pins to detect when a plug is connected, auto-switch audio output, or mute/power down when unplugged
• Sturdy Mechanical Connection – Two through-hole contacts near the jack opening for solid mounting
• Mounting Holes – For secure board attachment
• Breadboard-Friendly – Header strip included for breadboard or perfboard use

Ideal For

• Audio projects requiring stereo + microphone connections
• Headphone/speaker auto-switching circuits
• Repurposing 3.5mm cables for data transmission (power, ground, 2 data lines)
• Plug detection and insertion sensing

Package Contents

• 1× Adafruit TRRS Jack Breakout Board (fully assembled)
• 1× Header strip