After copying some MP3 files to the SD card and uploading the Arduino Sketch, you can see that the red LED on the ... little MP3 player module at a fantastic price. The performance of this cheap ...

Portable Innovation Technology’s SD MemPlug Module supported SD/MMC way back in 2002. However – MemPlug was a commercial product, while Dmitry’s work is open source. Schematic of Dmitri’s ...