Product Introduction:

This product M38 for low power BT design scheme, support new BT 5.0 transmission, dual channel stereo lossless playback, module connected to BT, can quickly achieve BT wireless transmission, very convenient. In open environments, the BT connection distance can be up to 20 meters.

Widely used in a variety of BT audio reception, a variety of audio DIY modification.

BT V5.0, support BT automatic back connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual-channel output.

After the module is powered on, the mobile phone searches for the BT name XFW-M18/XFW-M28/XFW-M38, and then plays music after connecting the BT.

Module blue indicator:

When the BT is not connected, the indicator blinks quickly.

When the BT is connected, the indicator light is steady on;

When the BT is playing, the indicator blinks slowly.

MH-M18

Function /Pin definition

1.The interface adopts a semi-hole process, which is convenient for customers to directly attach or solder to the board.

2.1. BT V4.2 version, support BT automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual channel output.

1. Power supply: You can directly use TYPE-C USB Android cable 5V directly for power supply, you can also connect to 5V power supply or 3.7V lithium battery (as shown below). The 5V and 3.7V power supply interfaces are different. The 5V voltage is connected to the 5V and GND, and the 3.7V lithium battery is connected to the VBAT and GND.

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

MH-M38

1. Power supply: You can directly use TYPE-C interface Android line 5V directly for power supply, you can also connect to 5V power supply or 3.7V lithium battery (as shown in the figure below). The 5V and 3.7V power supply interfaces are different. The 5V is connected to 5V and GND, and the 3.7V lithium battery is connected to VBAT and GND.

Large working current 5V2A, it is recommended to use 5V2A regulated power supply, better sound quality.

2. Support USB sound card, no drive (plug and play). Connect the module to the computer with the USB data cable, and the computer can play music through the power amplifier output of the module

3. Audio output: Output left and right channel stereo audio signal, can be connected to two 2-8 euro, 3-5W speakers, push storage with 4 euro 5W speakers.

4. This product has dual 5W power amplifier circuit, do not use another power amplifier! The output of the two amplifiers can not be connected in parallel or the negative electrode is connected together, otherwise it will damage the amplifier chip.