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Product Performance

1. Power supply voltage: DC SV:

2. Power supply current: 1A;

3. Trigger songs: directly trigger 9 songs, microcontroller triggers 31 songs;

4. Speaker: 0-3W, 4-8 ohms (adjustable volume);

5. Memory card: Supports up to 16GB:

6. Onboard red LED indicator light: constantly on when playing music, flashing when connected to a computer USB port (recognized as USB mode);

7. Power off memory storage: automatically saves the previously set volume level when the power is turned off;

Product Introduction

The MP3 voice playback module has 9 direct trigger ports, corresponding to A1-A9, which can be triggered directly at low level (0V or GND): in addition to the function of directly triggering 9 MP3 songs, it also has the on-demand function of 31 MP3 songs, which needs to be operated in conjunction with a microcontroller. This module comes with a TF socket, 3.5mm audio socket, speaker interface, volume adjustment potentiometer Micro USB socket

Product Precautions

1. The power supply voltage shall not exceed 5.5V;

2. The maximum power of the speaker is 3W4-8 ohms;

3. Speaker interface (audio dock) and speaker interface, both ports can output simultaneously;

4. When the Micro USB port is connected to a computer, MP3 songs in the TF card can be deleted or added, but when connected to the computer's USB port for power supply, the module cannot play (because it will be recognized as USB mode by the computer);

5. In non microcontroller mode, the module will not automatically play when powered on and requires on-demand playback; In microcontroller mode, the module automatically plays when powered on;

Product Funtions

This module not only has the function of directly triggering 9 MP3 players, but also has the on-demand function of 31 MP3 players. But this function requires the combination of a microcontroller to complete the operation.

Among them, A1-A5 are encoding ports, which are the reverse encoding method of binary encoding, and A1 is the th bit. For example, to play the first MP3, as shown in the table below

According to the output format of the above table, 0 represents low level output, 1 represents high level output. After encoding the output at the IO port of the microcontroller, wait for 200-500ms or more to immediately restore the default value (high level) and trigger successful song playback.

Example program:

Define the port first

sbit A5=P1^4;

sbit A4=P1^3;

sbit A3=P1^2;

sbit A2=P1^1;

sbit A1=P1^0;

Main program part (such as controlling the third song)

A5=1; A4=1; A3=1; A2=0; A1=0;// The surface of the corresponding table is 11100

Delay_ms(200);// Delay 200ms

A5=1; A4=1; A3=1; A2=1; A1=1;// Restore default value 11111

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