MP3 Audio Playback Module

Product Overview

This module features 9 direct trigger ports (A1-A9) for low-voltage (0V/GND) activation of 9 preloaded MP3 tracks, plus 31 additional tracks controllable via a microcontroller. Includes:

• ● TF card slot

• ● 3.5mm audio jack

• ● Speaker output

• ● Volume control potentiometer

• ● Micro USB port
  
  

Specifications

1. 1. Power Supply: DC 5V (±0.5V tolerance)

2. 2. Current: 1A

3. 3. Track Control:

   • Direct trigger: 9 tracks

   • MCU control: 31 tracks

4. 4. Speaker Output: 0–3W, 4–8Ω (adjustable volume)

5. 5. Storage: Supports up to 16GB TF card
   

6. 6. LED Indicator:

   • Solid red = Playing music

   • Blinking red = Connected to PC (USB mass storage mode)

7. 7. Power-Off Memory: Retains previous volume setting
   
   

Key Features

✔ Dual Output – Simultaneous speaker and audio jack use
✔ Plug-and-Play Editing - Manage MP3 files via Micro USB (PC recognizes TF card as USB)
✔ Flexible Modes:

• ● Standalone Mode: Manual trigger required after power-on

• ● MCU Mode: Auto-plays on power-up
  
  

Usage Notes

⚠ Warnings:

1. Do not exceed 5.5V input to avoid damage.

2. Speaker must be 3W max, 4–8Ω impedance.
   

3. USB Limitation: Module cannot play audio while connected to PC (enters storage mode).

(Ideal for DIY audio projects, announcements, or interactive installations.)

Download Resources:
https://pan.baidu.com/s/1geG5ySV | Password: sq62