MH-M28 Stereo Bluetooth Audio Receiver Module 4.2 Lossless

MH-M28 Stereo Bluetooth Audio Receiver Module 4.2 Lossless

This product MH-M18/M28/M38 is a low-power Bluetooth design scheme, supports the latest Bluetooth 4.2 transmission, two-channel stereo lossless playback, after the module is connected to Bluetooth, Bluetooth wireless transmission can be quickly realized, which is very convenient. In an open environment, the Bluetooth connection distance can reach up to 20 meters.

It is widely used in various Bluetooth audio receivers, various audio DIY modification, etc.

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Function Description:

1. Bluetooth V4.2 version, support Bluetooth automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual-channel output.
2. After the module is powered on, the mobile phone searches for the Bluetooth name MH-M18/MH-M28/MH-M38, and it can play music after connecting to the Bluetooth;
3. Module blue indicator light:

1. Power supply: You can directly use the MICRO USB Android cable 5V for power supply, or you can also connect to a 5V power supply or a 3.7V lithium battery. Note that the 5V and 3.7V power supply interfaces are different. The 5V voltage is connected to 5V and GND, and the 3.7V lithium battery is connected to VBAT and GND.

2. Audio output: The earphone can be directly connected to the 3.5mm audio interface, or can be wired for the audio input of the power amplifier board (the interface L/R/AGND can be directly wired).

• Precautions

1. Signal interference: Bluetooth antennas are extremely susceptible to interference from high-frequency or strong electromagnetic signals, so please place them as far away as possible from wireless devices. And the board can not be close to metal objects, keep a certain distance.

1. If there is current noise on the power amplifier board, the cause is caused by ground wire interference. It is recommended that you do not use plug-in wires at the output of the Bluetooth module , and you must solder the wires, especially the ground wires, and the wires should not be too long. The shorter the better. Thicker. The audio ground must be connected to the ground of the audio input end of the power amplifier. This ground point can be welded in different positions to achieve the lowest current sound. It is recommended that the Bluetooth and the power amplifier board be powered separately, and the Bluetooth ground and the power amplifier ground are isolated.

1. Since this product is a bare board design, try not to touch the components on the board with your hands, which will easily cause static electricity to kill the chip and cause burnout.