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Bluetooth stereo audio transmission solutions, let the music fly to more readily!
The new kind of picture shoot:
The program uses CSR 5746 chip Bluetooth version V4.0+EDR, can realize the horizon 10 meters (no barrier) high quality music transmission, launch part will convert Bluetooth stereo audio signal is sent to the receiving part, the scheme is simple to use, you can easily achieve the sound DIY modification, let you get rid of the fetters of cable, easy to enjoy high quality music.
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Emission characteristics
One. The use of the right 3.5mm audio cable, easy to use and conversion;
Two. The high performance of the CSR 5746 chip +16M large capacity memory chips, Bluetooth 4.0+EDR;
Performance parameter:
1, using CSR 5746 high performance chip;
2, Bluetooth 4.0+EDR;
3, support A2DP1.2 and AVRCP1.0 protocol;
4, support MP3 coding;
5, the Bluetooth master chip is the Kalimba 64MIPS processor, which has enough speed to handle all kinds of complex audio streams;
6, high speed and low delay streaming media coding, the use of music transmission fluid, pure sound quality;
7, A2DP, AVRCP protocol;
8, the operating current is 35~45mA;
9, the standby current is less than 1mA;
10, transmit power: 3dB;
11, receiving sensitivity: -90dB
The use of Bluetooth music transmitter:
1, the working voltage of 3.7-5V, USB power supply or power supply of lithium battery. Operating current <40mA;
2, audio input, the use of 3.5mm audio line, stereo input;
3, launch distance of 10 meters;
4, work mode, starting in a minute flash blue light, automatic connection with the paired device, after a minute into alternating red and blue lights flashing at the matching state, so that the Bluetooth headset pairing, when the transmitter and the Bluetooth headset pairing is successful, the blue light emitter constant light. If there is no match, the blue light flashes. Shutdown and then boot can be connected to the connection, the pairing mode, direct and Bluetooth headset pairing success, emitter blue light constant.
Characteristics of emission and matters needing attention:
1, the transmitter will be automatically connected with the final pairing of the Bluetooth headset, the transmitter in the boot state, in the end with it paired bluetooth headset, boot automatically and the transmitter into the connection.
2, when the transmitter with another Bluetooth headset pairing, the current and its paired bluetooth headset off, when the blue light emitter constant light, that launcher is connected with other Bluetooth headset, Bluetooth headset to close to an open connection again in the matching state machine.
3, if the Bluetooth headset and mobile phone connection and at the same time with the transmitter connection:
First let Bluetooth headset and phone into the pairing connection;
Then turn off the phone, so that the transmitter and Bluetooth headset pairing connection.
Then turn on the phone, manually connect the Bluetooth headset, so that the transmitter can be connected with the phone at the same time to connect the Bluetooth headset. When there is an incoming call, the Bluetooth headset will automatically switch to the call mode, the end of the call will automatically switch to the receiver transmitter music mode.
Note: Bluetooth headset must be listening to music or music, Bluetooth and the Bluetooth headset transmitter can not be matched.
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Receiving part features
Main chip: CSRBC57F687B (BlueCore5-ROM)
Bluetooth version: V2.1+EDR
Output power: II Class
RF output power: 4dBm
Transmission distance: sight distance 10 meters
Size: 33.6mm*34.6mm
Rohs standard: Meet
application
Bluetooth stereo audio receiver
Bluetooth audio receiver section overview:
This module uses the CSRBlueCore5-ROM chip, is suitable for the Bluetooth audio receiving part, the Bluetooth stereo audio receiver and so on. The peripheral does not need the circuit, the module has the LED to display, the user only needs to supply the power to be able to work as well as.
The following is a physical map:
Remarks：
1, the front toggle switch to control the power supply, Mini seat USB is charging 3.5 audio input.
Stereo audio output interface
2, the test points can be used as wires, pay attention to temperature and time, do not use copper foil
Burn down.
Installation notes:
Bluetooth work in the 2.4G radio frequency band, should try to avoid the impact of various factors on the wireless transceiver, attention should be as far as possible to make the module antenna part away from the metal part