BTA-RX-B Bluetooth audio receiver module， the use of CSR8640 Bluetooth chip， support AVRCP， A2DP， AAC， Bluetooth 4 version， DIY Bluetooth speakers essential products， home speaker modification for the best choice of Bluetooth speakers.
Reference circuit description:
1 foot position description
1) MUTE， control the external power amplifier so that the output of the high level of the audio transmission， usually low level， high level of 1.8V.
2) PLAY buttons， short press play pause， press 3 seconds to force into the pairing mode (disconnect Bluetooth， re search).
3) PREV/V- buttons， press a button， press the volume down.
4) NEXT/V+ buttons， press a button， press the volume up.
5) 1V8， the module 1.8V output pin， the main use for the key (only for the use of module keys， do not do other power supply).
6) LED0， then the red LED light. (Bluetooth audio receiver module has integrated LED lights， can be omitted)
7) LED1， then blue LED light. (Bluetooth audio receiver module has integrated LED lights， can be omitted)
8 GND (AGND)， the power supply anode and GND by magnetic single point connection).
9) VCC， power supply positive electrode， voltage 3.3V-5.5V (voltage not exceeding 6V).
10) L， left channel output.
11) R， right channel output.
12) AGND， (AGND and GND audio public end by magnetic beads single point connection).

 

 

 

 

 

 

 

 

 

 

 

 

';