Features

  • Supports micro SD card (up to 32GB).
  • Supports USB flash drive (up to 32GB).
  • 2W mono amplifier with 3.7V and up to 3W with 5V power supply.
  • Headphone jack, compatible with headphones or external amplifier.
  • Powered by 3.7V rechargeable lithium Battery or DC 5V power supply through micro USB port.
  • Possible to charge lithium battery through micro USB port.
  • Automatically plays MP3 files.
  • No solder output audio to speaker.
  • 4 functional buttons: “Previous/V--“, “Next/V++”, “Play/Pause/Mode”, & “Repeat”.

Documentation

Tools

  • MP3 decoder module
  • Micro SD card
  • 3.7V lithium battery
  • 8 ohm 0.3W Speaker
  • Female to female jumper cables
  • Male header pins
  • MP3 formatted file

Steps

Solder male header pins to the module, & speaker.

Connect battery and speaker to module.

Wiring:

NOTE: Once connected to power a red LED should light up and stay solidly lit.

Insert micro SD card and adapter into you computer.

On you computer open a file locator.

Copy and past an MP3 file on to the micro SD card.

NOTE: File MUST be in mp3 format.

Remove adapter from your computer and micro SD card from the adapter.

Insert into the micro SD slot on module.

Wait a moment and it should automatically start playing.

NOTE: When the module is reading the micro SD card the red LED should be flashing.