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Make your classic audio amplifier/player to bluetooth wireless. Connect to this module, to send music/voice stream to it.
- Simple four wires wiring – power, ground, L, R to amplifier
- Power supply on 3.7-4.2V, if use 5V, can simply added diode.
- Module size – 30mm X 20mm X 3mm
- Main board.
- Two capcitors, use when target amplifier board does not have this.
- LED + resistor, to indicate bluetooth status on pin LED
If you heard noise out, please added the filter capacitors on the extra pins.