Bluetooth MP3 dekódoló modul audio vevő kártya veszteségmentes autó hangszóró erősítő módosítás Bluetooth 4.1 áramkör barkácsolás
Bluetooth MP3 decoding module audio receiver board lossless car speaker amplifier modification Bluetooth 4.1 circuit DIY
Characteristics
Power Supply

3.7-5V
SNR

90dB
THD N

-70dB
Crosstalk

-86dB
DNR

91dB
Support Profile

A2DP/AVCTP/AVDTP/AVRCP/HFP
LOS

>15m
Detailed description
Power connector

Universal Micro USB 5V power supply
3.7-5V power supply pad

Realize external 3.7-5V power supply modification
UDisk interface

Support playing MP3/WAV/APE/FLAC files in U disk, support FAT16/32 file format
TF card interface

Support playing MP3/WAV/APE/FLAC files in TF card, support FAT16/32 file format
LED indication

The blue light in bluetooth mode is on, and the blue light in music mode is flashing
3.5mm stereo output

Standard 3.5mm interface, output stereo sound source, can insert earphones, connect power amplifier and other equipment
Button function definition
button

Features
MODE

"Short press", TF card, U disk, Bluetooth mode switch
P/P

"Short press" to switch between play and pause
NEXT/V

"Short press "Next song," long press "Volume increase
PREV/V-

"Short press" the previous song, "long press" the volume to decrease
RPT

"Short press", single/loop switch
Instructions
1. Mode control
When the decoder board is not plugged in with a USB flash drive or TF card, the default is Bluetooth mode when powered on; when the decoder board is plugged in with a USB flash drive or TF card, the default is in music mode when powered on; the mode is switched through the MODE button.
2. Music mode
Insert the U disk or TF card to play the stored audio files.
3. Bluetooth mode
Switch the mode to broadcast the English "The bluetooth device is ready to pair", indicating that you enter the Bluetooth mode and wait for pairing; the "XFW_BT" searched by the mobile phone's Bluetooth is the device name of the decoder board, click connect, the decoder board prompts "The bluetooth device is connected successfully ", it means that the decoder board is successfully connected to the mobile phone and you can play music.
Precautions
1. If U Disk is playing, it is recommended to use USB 5V power supply (3.7V lithium battery is not recommended), because the early U disk does not support 3.7V voltage.
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