This design is mainly a MCU control of the creation of MP3 player, to achieve a variety of playback functions, a variety of storage methods, you can use U disk storage, can also use memory card storage, and through the key to switch the disk sign; Change the way the song is played in a loop; To randomly switch the top and bottom songs; The current time of playing songs, the number of songs in the storage medium, which song is currently playing, and the clock are all clearly displayed on TFT; Divide left sound channel and right sound channel adopts double loudspeaker to support stereo; Support mobile phone computer and other equipment output audio, to achieve the function of small speakers. The main modules of this design are STM32F103C8T6 minimum system module, XY-V17BMP3 module, LTK5128D class power amplifier module, DS1302 clock module, speaker module, LCD display module.