DIY Modification of Car Audio Amplifier Bluetooth Module: Bluetooth 4.1 Audio Receiver Mainboard for Stereo Sound
Bluetooth Decoder Board-DIY
Supports Bluetooth4.1, supports automatic reconnection, and supportsWAV+APE+FLAC+MP3 lossless decoding with stereo output.
Parameter Characteristics
|
Power Supply |
3.7-5V |
|
SNR |
90dB |
|
THD+N |
-70dB |
|
Crosstalk |
-86dB |
|
DNR |
91dB |
|
Support Profile |
A2DP/AVCTP/AVDTP/AVRCP/HFP |
|
LOS |
>15m |
Interface Detailed Description
|
USBPower Supply |
UniversalMicro USB 5VPower Supply |
|
3.7-5VPower Supply Pads |
Enables external3.7-5V lithium battery power modification |
|
LEDIndicator Light |
Bluetooth mode blue light stays on |
|
3.5mmStereo Audio Interface |
Standard3.5mm interface, outputs stereo audio source, can be plugged into headphones, connected to amplifiers, etc. |
Operating Instructions:
After powering on, the blue indicator light stays on, entering Bluetooth mode; it announces in English “The bluetooth device is ready to pair”, indicating it has entered Bluetooth mode and is waiting for pairing; the phone’s Bluetooth searches for “XY_BT”, which is the device name of the decoder board. Click to connect, and the decoder board prompts “The bluetooth device is connected successfully”, indicating that the decoder board is successfully connected to the phone, and music can be played. See the image below.
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