Simple Mp3 Circuit. Or else to play mp3 files in arduino there are websites which you can be used. This 28 pin ic is a stereo audio digital to analog.
Once the song is over it will automatically move to next song. Connect remain wire of speaker to 5v supply. All the components used in this circuit.
Since the mp3 player is running at 3 3v and the arduino is running at 5v we simply make these 3 pins inputs until we need to ground one of them.
After building the circuit apply power and connect it to the audio output of your device then set your fm radio frequency on a blank spot and slightly. A simple mp3 fm transmitter circuit shown here can be built easily in few minutes if all parts are available to you. This 28 pin ic is a stereo audio digital to analog. For splitting the signal you can use resistors for basic splitting.
