Arduino Uno, 10 buttons (for notes and play/pause), SD card module, 1602 LCD, 8x8 LED matrix, Sound sensor module, Speaker, multiplexer, 2 breadboards, wires, resistors Working principle: The buttons ...

Regular SD-Card Baord with Attiny If you don't have the custom board, you can still connect a regular SPI SD card module to an ATTiny for the same purpose. Connect the SPI SD Card module to the Attiny ...