This is a compact MP3 player/decoder board which can play MP3 audio file from a removable media without having to connect to a micro controller. Great for hacking, this module can be embedded to your project.
User control is performed using 4 push-buttons on board. Depending on the button, a different function is triggered by short pressing or long pressing it. A long press is defined by holding the button for at least 2 seconds.
The board supports two type of removable media with MP3 files - micro SD card or USB thumb drive. Upon powering it up, the board will try to play from the micro SD card by default. If no micro SD card present, it will play from the USB drive. You can switch media type by long pressing the "Mode" button.
To get the sound output, you can plug a headphone or an external speaker to the 3.5mm audio jack. There is also a screw terminal where you can connect wires from external speaker. This is driven by an on-board 4W mono amplifier.
The board can be powered using standard micro usb cable from a portable battery or USB wall plug. Alternatively, you can solder 3.7V lithium battery to the solder pads next to the micro USB jack. Voltage between 3.7V to 5.5V can be used but 5V is recommended.
* Removable media is not included
Features:
Power:
micro USB port - standard 5V from micro USB power (power bank, wall plug etc.)
solder pads - 3.7V - 5.5V battery power source
Status LED:
blinking red - playing mode
steady red - pause mode
User control buttons:
Prev/V-- - short press to play previous file. Long press to turn the volume down
Next/V++ - short press to play next file. Long press to turn the volume up
P/P/Mode - short press to pause, press again to play. Long press to switch removable media from micro SD card to USB drive and vice versa
Repeat - short press to repeat a single song over and over. Press again to play all songs in the media. All songs will be played by default
Removable media support:
micro SD card - tested up to 16GB capacity
USB thumb drive - tested up to 32GB capacity
Sound output:
3.5mm audio jack - can be connected to headphone or external speaker, gold plated
speaker terminals - supported by on board 4W mono amplifier. Connect directly to external speaker (4 Ω 3W speakers recommended). Screw-in teminals - no soldering required
