Bluetooth MP3 Decoding Module Audio Receiving Board Lossless Car Speaker Power Amplifier Modification 4.1 Circuit BoardItem NO.: ZZ-BT

Bluetooth MP3 Decoding Module

Product Information:

The Bluetooth decoding board supports Bluetooth 4.1, automatic loopback function, WAV+APE+FLAC+MP3 lossless decoding, stereo output, on-board stereo 3W amplifier, USB Audio function, built-in TF card download, U disk, TF card playback, and infrared remote control

Parameter Properties:

●Power Supply：3.7-5V

●SNR：90dB

●THD+N：-70dB

●Crosstalk：-86dB

●DNR：91dB

●Support Profile：A2DP/AVCTP/AVDTP/AVRCP/HFP

●LOS：>15m

Detailed Interface Description:

● Micro USB power supply: universal micro USB 5V power supply

● USB Audio: connected to the computer via USB data cable can be used as an external sound card

● U disk interface: supports playing MP3/WAV/APE/FLAC files in U disk and FAT16/32 file format

● LED indication: the blue light of Bluetooth mode is always on, and the blue light of music mode is flashing

● TF card interface: supports playback of MP3/WAV/APE/FLAC files in TF card and FAT16/32 file format

● Infrared remote control: support infrared remote control operation, see the following definitions for functions

● AD key interface: key interface, providing different resistance parameters and realizing different key functions

● Bluetooth decoding IC: main control chip of decoding board

● 3.5mm stereo output: standard 3.5mm interface, output stereo sound source, can be inserted into earphones, and connected to power amplifiers and other devices

● Right channel 3W: Audio right channel output, can drive 3W speakers

● Left channel 3W: Audio left channel output, can drive 3W speakers

● 3W * 2 power amplifier: on-board 2-way 3W power amplifier to realize stereo driving 3W speakers

● 3.7-5V power supply pad: realize the modification of external 3.7-5V power supply

Key And Remote Control Function Definition:

● PREV/V -: "Short press" the previous song, "long press" the volume decreases

● P/MODE: "Short press" to switch between play and pause, "long press" to switch between modes

● NEXT/V+: "Short press" Next song, "long press" Volume increase

● MODE: TF card, U disk, Bluetooth MODE switching

● RPT: single song/cycle switching

● EQ: switching of sound effect mode