MH-MX28 Bluetooth Audio Module Type-C/Micro USB Interface Headphone Port Output
Low-power Bluetooth design solution, supporting the latest Bluetooth 5.1 transmission, dual-channel stereo lossless playback.
module connected to Bluetooth, it can quickly achieve Bluetooth wireless transmission, very convenient.
Bluetooth connection distance up to 20 meters in open environment.
Widely used in a variety of Bluetooth audio reception, a variety of audio DIY modifications, etc.
No. Pin Description
1 5V Power positive 5V
2 GND negative power supply
3 VBAT Lithium positive 3.7-4.2V
4 L Left channel output
5 R Right channel output
6 AGND Audio ground
1. Power supply: You can directly use Type-C 5V for direct power supply, or you can additionally access 5V power supply or 3.7V Li-ion battery (as shown in the figure below). Note that the 5V and 3.7V power supply interface is not the same, 5V voltage connected to 5V and GND, 3.7V lithium battery connected to VBAT and GND.
2. Audio output: headphones can be directly connected to the 3.5mm audio interface, can also be wired for the audio input of the amplifier board (as shown in the figure of the interface L/R/AGND can be directly wired).
Signal interference: Bluetooth antenna is extremely vulnerable to high-frequency or strong electromagnetic signal interference, try to place away from the place of sending wireless and other equipment. And the board can not be close to metal objects, keep a certain distance.
If you connect the amplifier board with current sound, caused by the cause of ground interference caused by the proposed Bluetooth module output do not use the plug line, you need to solder the line, especially the ground line to be soldered, and the line can not be too long, the shorter the better, as thick as possible. Audio ground in the amplifier board ground problem, need to be connected to the amplifier audio input ground, this ground can try to weld in a different location to achieve the lowest current sound. It is recommended that the Bluetooth and amplifier board separate power supply, isolate the Bluetooth ground and amplifier ground.
As this product is designed for bare board, try not to touch the components on the board with your hands, it is easy to lead to electrostatic death of the chip resulting in burnout.
1 x Module Headphone Port Output
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Am 26.12.2022 hat der Verkäufer die folgenden Angaben hinzugefügt: