Project Documentation

Battery-Powered MP3 Player with Amplified Dual Speakers

Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an MP3 module, a 5V amplifier board, two 18650 Li-ion batteries, two speakers, a TP4056 battery charging protection module, and a 2-pin push switch. The circuit is designed to play audio through the speakers, with power supplied by the batteries and managed by the TP4056 module.

Component List

MP3 Module
- Pins: L, T, R, -, Vin(5 or 12v)
- Description: An MP3 module used to play audio files.
- Purpose in Circuit: Provides audio signals to the amplifier.
5V Amplifier Board
- Pins: -, +, G, Vin, R, T, L
- Description: A 5V amplifier board used to amplify audio signals.
- Purpose in Circuit: Amplifies audio signals from the MP3 module to drive the speakers.
18650 Li-ion Battery
- Pins: -, +
- Description: A rechargeable lithium-ion battery.
- Purpose in Circuit: Provides power to the circuit.
Speaker
- Pins: +, -
- Description: A speaker used to output audio.
- Purpose in Circuit: Converts amplified audio signals into sound.
TP4056 Battery Charging Protection Module (Type C)
- Pins: OUT +, B+, B-, OUT -, +, -
- Description: A battery charging and protection module.
- Purpose in Circuit: Manages charging and discharging of the 18650 batteries.
2-Pin Push Switch
- Pins: Input +, Output +
- Description: A push switch used to control power.
- Purpose in Circuit: Turns the circuit on and off.

Wiring Details

MP3 Module

L is connected to L on the 5V amplifier board.
T is connected to T on the 5V amplifier board.
R is connected to R on the 5V amplifier board.
- is connected to:
- G on the 5V amplifier board
- - on both 18650 Li-ion batteries
- B- and OUT - on the TP4056 module
Vin(5 or 12v) is connected to Vin on the 5V amplifier board and Output + on the 2-pin push switch.

5V Amplifier Board

L is connected to L on the MP3 module.
T is connected to T on the MP3 module.
R is connected to R on the MP3 module.
G is connected to:
- - on both 18650 Li-ion batteries
- B- and OUT - on the TP4056 module
- - on the MP3 module
Vin is connected to Vin(5 or 12v) on the MP3 module and Output + on the 2-pin push switch.
- is connected to:
- + on one speaker
- - on the other speaker
+ is connected to:
- - on one speaker
- + on the other speaker

18650 Li-ion Battery

- is connected to:
- G on the 5V amplifier board
- - on the MP3 module
- B- and OUT - on the TP4056 module
+ is connected to:
- OUT + and B+ on the TP4056 module
- Input + on the 2-pin push switch

Speaker 1

+ is connected to - on the 5V amplifier board.
- is connected to + on the 5V amplifier board.

Speaker 2

+ is connected to + on the 5V amplifier board.
- is connected to - on the 5V amplifier board.

TP4056 Battery Charging Protection Module (Type C)

OUT + is connected to:
- + on both 18650 Li-ion batteries
- Input + on the 2-pin push switch
B+ is connected to + on both 18650 Li-ion batteries.
B- is connected to:
- - on both 18650 Li-ion batteries
- G on the 5V amplifier board
- - on the MP3 module
OUT - is connected to:
- - on both 18650 Li-ion batteries
- G on the 5V amplifier board
- - on the MP3 module

2-Pin Push Switch

Input + is connected to:
- OUT + on the TP4056 module
- + on both 18650 Li-ion batteries
Output + is connected to:
- Vin on the 5V amplifier board
- Vin(5 or 12v) on the MP3 module

Code

There is no code provided for this circuit.