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Ready to bring your Arduino projects to life with sound? This bonus lesson will teach you how to build your own SD Card MP3 Player from scratch! Perfect for makers who have completed the basic Grandpas Gizmos course, this hands-on project combines electronics, programming, and creativity in one exciting build. You'll learn how to interface the DFPlayer Mini module with your Arduino, decode and play MP3 files, and control playback through simple commands. No previous experience with audio projects is required and all the programming code you'll need to create a fully functional MP3 player is provided. By the end of this bonus lesson, you'll have built a working MP3 player and gained the confidence to incorporate audio into any Arduino project.