1) Connecting the Main Components
For this first step we’ll connect the microcontroller, pushbuttons, and mp3 microSD module. These components do the following:
Microcontroller – the brain of the music player that handles all the main functions.
Pushbuttons – when the user presses them, they send a signal to the microcontroller to perform a function that’ll control the music player.
Mp3 MicroSD Module – reads the mp3 files from the microSD card and plays them when the microcontroller tells it to.
Here is the breadboard wiring diagram for this step:
