Design with Serial MP3 Player in Cirkit DesignerThe Serial MP3 Player is a compact audio module that can play MP3 files stored on a microSD card. It is designed for easy integration into various electronic projects, including interactive installations, sound effects for toys, or as a standalone MP3 player. The device is controlled via serial commands, making it compatible with microcontrollers such as Arduino, Raspberry Pi, and others.
This circuit is an MP3 player system controlled by a Seeed Studio nRF52840 microcontroller. It includes a DFPlayer MINI for audio playback, a 0.96" OLED display for visual feedback, and multiple pushbuttons for user interaction. The system is powered by a 3.7V LiPo battery and outputs audio through a 3.5mm audio jack.
Open Project in Cirkit Designer
This circuit integrates an A-Star 32U4 Mini microcontroller with an MP3 Decoder Player Module to create a basic MP3 player system. The microcontroller is likely used to control playback functions such as mode selection and track navigation, as indicated by the connections to the Mode, Repeat, Prev/V--, and Next/V++ pins of the MP3 module. The Loudspeaker is connected to the MP3 module to output the audio signal.
Open Project in Cirkit Designer
This circuit is a portable audio playback system powered by two 18650 Li-ion batteries, which are charged and protected by a TP4056 module. The MP3 module provides audio signals to a 5V amplifier board, which then drives two speakers. A push switch is used to control the power to the MP3 module and amplifier.
Open Project in Cirkit Designer
This is a microcontroller-based interactive device featuring an ESP32 for control, a Serial MP3 Player for audio output, an LCD display for user interface, and various buttons for input. It includes a battery with a charging module and voltage regulation, and uses a rocker switch for power control. The system's functionality is determined by the embedded code, which is currently a placeholder for future development.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VCC | Power supply (3.2V - 5.25V) |
| 2 | GND | Ground connection |
| 3 | TX | Serial transmit, connects to RX on the microcontroller |
| 4 | RX | Serial receive, connects to TX on the microcontroller |
| 5 | SPK1 | Speaker output 1 |
| 6 | SPK2 | Speaker output 2 |
#include <SoftwareSerial.h>
// RX and TX connected to pins 10 and 11 on the Arduino
SoftwareSerial mySerial(10, 11);
void setup() {
// Open serial communications
Serial.begin(9600);
while (!Serial) {
; // Wait for serial port to connect
}
// Set the baud rate for the MP3 player
mySerial.begin(9600);
delay(500); // Wait for MP3 player to initialize
mySerial.write(0x7E); // Starting byte
mySerial.write(0xFF); // Version
mySerial.write(0x06); // Command length
mySerial.write(0x09); // Command name (Play)
mySerial.write(0x00); // Feedback (0x00 = no, 0x01 = yes)
mySerial.write(0x00); // Parameter 1 (0x00 = no repeat, 0x01 = repeat)
mySerial.write(0x01); // Parameter 2 (song number)
mySerial.write(0xEF); // Ending byte
}
void loop() {
// Here, you can add code to control the MP3 player further,
// such as play, pause, next, previous, volume control, etc.
}
Q: Can I connect the Serial MP3 Player directly to an Arduino without a level shifter? A: Yes, if the Arduino operates at 5V, it is within the acceptable voltage range for the Serial MP3 Player.
Q: How many audio files can the Serial MP3 Player handle? A: It can handle as many files as the microSD card can store, up to the card's capacity limit.
Q: Can I power the Serial MP3 Player from the Arduino's 5V pin? A: Yes, as long as the Arduino's power supply can handle the additional current draw.