TF card MP3 decoder board — USB audio player module, microSD, 3.5mm output
The TF Card MP3 Decoder Board is a compact, standalone audio player module that decodes and plays MP3 audio files stored on a TF (microSD) card or USB flash drive (U-disk). With a built-in audio DAC and 3.5mm stereo output, it can drive headphones or feed into an amplifier directly — no external decoder chip required. It is ideal for adding audio playback to embedded projects, DIY speakers, voice prompt systems, and interactive displays.
Control is straightforward via onboard buttons or through serial UART commands from a microcontroller such as Arduino, ESP32, or STM32, making it easy to trigger specific tracks, adjust volume, or loop audio programmatically.
Key Specifications:
- Supported media: TF card (microSD) and USB flash drive (U-disk)
- Supported audio format: MP3
- Output: 3.5mm stereo headphone jack
- Control interface: Onboard buttons + UART serial (TTL, 5V compatible)
- Supply voltage: 5V DC (via USB or pin header)
- Supported file system: FAT16 / FAT32
- Max TF card size: 32GB (FAT32)
- Onboard controls: Play/Pause, Next, Previous, Volume Up/Down
- LED indicator: yes (playback status)
- Dimensions: compact module form factor
Key Features:
- Dual media support — play from TF (microSD) card or USB flash drive interchangeably
- Standalone operation — works without a microcontroller using onboard buttons
- UART serial control — send commands from Arduino, ESP32, STM32 to play tracks, set volume, loop, etc.
- 3.5mm stereo output — connect directly to headphones, speakers, or an audio amplifier
- Simple file naming — tracks played in order by filename (e.g. 001.mp3, 002.mp3)
- 5V powered — compatible with standard USB power banks and microcontroller 5V rails
Applications:
- DIY MP3 player and portable audio projects
- Voice prompt and announcement systems
- Arduino / ESP32 sound effect modules
- Interactive displays and kiosks
- Educational robotics and STEM projects
- Alarm and notification sound modules
Note: Format the TF card as FAT32 and name audio files sequentially (e.g. 001.mp3) for reliable playback. An external amplifier module (e.g. PAM8403) is recommended for driving speakers.