Introduction

The CJMCU-TRRS is a compact breakout module featuring a standard 3.5mm TRRS (Tip-Ring-Ring-Sleeve) jack for audio and video signal interfacing. This module simplifies connections between microcontrollers and audio/video devices.

Key Features

Technical Specifications

Pin Configuration

Pin Label	Function	TRRS Connection
L	Left Audio Channel	Tip
R	Right Audio Channel	Ring 1
GND	Ground	Ring 2
V/M	Video or Microphone	Sleeve

Basic Wiring with Arduino

// Simple Audio Output Example
const int audioPin = 9; // PWM pin for audio output

void setup() {
  pinMode(audioPin, OUTPUT);
}

void loop() {
  // Generate simple tone
  tone(audioPin, 440, 500); // 440Hz for 500ms
  delay(1000);
}

Common Applications

Troubleshooting