Simple Sd Card Mp3 Player Circuit Diagram. Insert a suitable sd card containing mp3 files. The mp3 files can be in the root of the sd card or in 1 folder deep.
Since the mp3 player module accepts only 3 3 v or 5v so we have used voltage regulator here to regulate the battery s 9 v to 3 3 v. Mp3 player circuit diagram. A switch to on off is present too on or off the module 0 1 uf capacitor is used here for noise filtration and is connected across vcc and gnd.
The complete circuit diagram is shown in the image below.
The complete circuit diagram is shown in the image below. Since the mp3 player module accepts only 3 3 v or 5v so we have used voltage regulator here to regulate the battery s 9 v to 3 3 v. As we know our audio files are saved into the sd card hence we interface a sd card reader module with our arduino. Values on the circuit diagram are subject to changes.
