Homemade Mp3 Player Circuit Diagram. The received signal from ir remote is fed to a0 pin of arduino. The resistors connected in series with the output r4 and r8 are there to keep the booster stable when a long cable is connected to its output.
The audio amplification of the circuit is done by connecting the speaker directly to the power source. We have used a 9v battery and a kia78r voltage regulator to regulate the battery s 9v to 3 3v. The above design is simple as the push button based.
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Connect the power supply to the circuit. The resistors connected in series with the output r4 and r8 are there to keep the booster stable when a long cable is connected to its output. The circuit diagram shown above will show how we can connect push button to the mp3 module so that we can control the track and volume. Connect the circuit diagram as in the one marked with amplifier with gain 20 and you get 20 fold the signal.
