The Bluetooth audio module requires very high power, otherwise, it will affect the sound quality. The power supply must be provided if the LC filter circuit is a switching power supply.
PCB size: 23 x 15 x 2.4mm
Pin pitch: 2.54mm
dual-channel mono amplifier
1, search less than blue:
The power line, usually caused by power interference, must be connected to the LC filter circuit.
2, Whether to support 3.7V power supply:
The module is powered by 5V by default. You can replace the diode in the JDY-61 module with 0805 or resistor, or use wire for a short circuit, so you can use a lithium battery
3, Bluetooth signal is very weak
Do not route or turn off the copper under the antenna of the Bluetooth module. There should be no metal shields around the antenna.
4, the current sound is too loud
It is recommended that the wiring of the power amplifier is not too long and that the Bluetooth port and power port are disconnected, usually caused by power supply interface interference.
PIN Function Description
1 VCC Voltage range 4.2-5V, can not exceed 5V power supply
2 LED Play music flashes, stop playing constantly lit
3 MUTE High level when muting, default low level
4 AUDIO Audio output pin
5 KEY Empty pin
6 GND Power ground
Package includes: 1 x 4.0 BlueTooth Audio Receiver Module