Bluetooth decoder board
Notice! ! ! The power amplifier output power of this product is very small. It can be connected to small speakers below 3W and 8 ohms. The power should not exceed 3 watts. Otherwise, the chip will be burned by overheating, and the output terminal will be burned out if the output is short-circuited. , If the chip burns, we will not make compensation! Thank you for your understanding, if your output power is relatively large, it is recommended that you buy a high-power amplifier to cooperate
Support Bluetooth 4.1, support automatic connection function, support WAV+APE+FLAC+MP3 lossless decoding, stereo output, onboard stereo 3W amplifier, support USB Audio function, built-in TF card download, support U disk, TF card playback , Support infrared remote control
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 |
Function and interface definition
Detailed description of the interface
Micro USBpowered by | UniversalMicro USB 5Vpowered by |
USB Audio | pass throughUSBThe data cable connects to the computer and can be used as an external sound card |
UDisk interface | Support playbackUIn-diskMP3/WAV/APE/FLACFile, supportFAT16/32file format |
LEDinstruct | The blue light in bluetooth mode is on, and the blue light in music mode is flashing |
TFCard interface | Support playbackTFIn the cardMP3/WAV/APE/FLACFile, supportFAT16/32file format |
Infrared remote control | Support infrared remote control operation,Function see the following definition |
AD keyinterface | Button interface, providing different resistance parameters to realize different button functions |
Bluetooth decodingIC | Decoding board main control chip |
3.5mmStereo output | standard3.5mmInterface, output stereo sound source, can insert earphones, connect power amplifier and other equipment |
Right channel3W | Audio right channel output, can be driven3Wtrumpet |
Left channel3W | Audio left channel output, can be driven3Wtrumpet |
3W*2Power amplifier | Onboard2road3WPower amplifier, realize stereo drive3Wtrumpet |
3.7-5VPower supply pad | Realize external3.7-5VPower supply modification |
Button and remote control function definition
button | Function |
PREV/V- | “Short press“Last song,” long press“Volume down |
P/MODE | “Short press“Play and pause switch,” Long press“Mode switch |
NEXT/V+ | “Short press“Next song,” Long press“Volume increased |
MODE | TFCard,USwitch between disk and Bluetooth mode |
RPT | Single/Cycle switch |
EQ | Sound effect mode switch |
size
Instructions
1, Mode control
When the decoder board is not plugged inUDisk orTFCard, the default is Bluetooth mode when power on; when the decoder board is plugged inUDisk orTFCard, the default is music mode when power on; through the remote controlMODEKey or press the key to switch the mode.
2, Music mode
insertUDisk orTFThe card can play the stored audio files.
3. Bluetooth mode
Switch mode to broadcast English“The bluetooth device is ready to pair“,Description enter the Bluetooth mode and wait for pairing; mobile phone Bluetooth searched”XY_BT“ is the device name of the decoder board, click to connect, the decoder board prompts”The bluetooth device is connected successfuly“,It means that the decoder board is successfully connected to the mobile phone, and then the music can be played.
4. USB Audio
USB AudioMode is the sound card mode, useUSBThe data cable connects the computer and the decoder boardUSB AudioInterface, switch modePrompt English“USB Mode“That isUSB Audiomodel. Open the computer’s music player to play music, you can play the music in the computer through the decoder board; if you plug inTFCard, you canTFThe card performs read and write operations;
Note: useUSB AudioMode, must not be insertedUplate.
Precautions
1, ifUDisc playback, recommendedUSB 5Vpowered by（Not recommended for use3.7VLithium battery powered）Because of the earlyUDisk does not support3.7VVoltage.
2, Must be used when using mobile power or computer power supplyPOWERInterface, can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t be usedUSBAudioInterface, otherwise it cannot be playedUMusic on the disk.
3. UPlate orTFCard, decoder board only supportsFAT16/FAT32File system, not supportedNTFSsystem.