Mô Đun Khuếch Đại Âm Thanh Bluetooth 4.2 Chất Lượng Cao tại Lotte Market

Giới thiệu Mô Đun Khuếch Đại Âm Thanh Bluetooth 4.2 Chất Lượng Cao tại Lotte Market

Product description:

Mh-m18/m28/m38 is a low-power bluetooth design program, which supports the latest bluetooth 4.2 transmission, dual channel stereo nondestructive playback, and module connection with bluetooth, which can quickly realize bluetooth wireless transmission.In an open environment, the bluetooth connection distance can be up to 20 meters.Widely used in various bluetooth audio reception, various audio diy modification and so on.

We offer 3 versions for you to choose according to different customer needs
Functional description:

Version v4.2, support bluetooth auto-link technology, support wav/wma/flickr/ape/mp3 without damage decoding, stereo dual channel output.
After the module is on the phone, the bluetooth name mh-m18/mh-m28/mh-m38 is searched and the music can be played after connecting to bluetooth;
Module blue indicator lamp:
When bluetooth is not connected, the indicator lights flash quickly;

When bluetooth is connected, the indicator lamp is always on;

The sign light flashed slowly when bluetooth was playing.
Points to note
Signal jamming: bluetooth antennas are extremely vulnerable to high frequency or strong electromagnetic interference, and are located as far away from devices such as wireless transmission.And the plate can't be attached to the metal objects, keep a certain distance.


If the connection amplifier plate has an electric current sound, which is caused by ground-line interference, it is recommended that the output end of the bluetooth module do not use plug-in wire, necessary welding line, especially ground-line welding, and the longer, the shorter, the better, the thicker.The problem of audio access to the amplifier board must be connected to the amplifier audio input site, which can attempt to weld at different locations to achieve the lowest current sound.It is recommended that bluetooth and amplifier be powered separately and that bluetooth and amplifier be separated.


As this product is designed for bare plate, try not to touch the components on the plate by hand, easy to lead to electrostatic killing chips leading to burning.
Warning: this product charging interface is limited current charging mode, no charge management!For your life and property safety, please make sure to use lithium batteries with protective panels produced by regular manufacturers, if improper use causes loss, we do not bear any responsibility!

Also: two points need to be noted for mh-m18 use:

Power supply: by default 5v.If a 3.7v lithium battery is required to supply electricity, the diode (as shown in the figure) needs to be replaced by a 0-eu resistance of 0603 or a direct short circuit of both ends of the solder plate.Delivery default 5v power supply, if customer needs 3.7v lithium battery power supply can be customized in bulk.


The high requirement of bluetooth audio module will affect the quality of audio, and it is recommended to add lc filter circuit, especially switching power supply (e.g. mobile phone charger)