Features:
1.Newly upgraded Type-C interface;
2.Low power Bluetooth design scheme, supporting the latest Bluetooth 5.1 transmission, and dual channel stereo lossless playback;
3.After the module is connected to Bluetooth, it can quickly realize Bluetooth wireless transmission, which is very convenient;
4.In an open environment, the Bluetooth connection distance can reach 20 meters;
5.Widely used in various Bluetooth audio reception, various audio DIY modification, etc.
Parameters:
No. Pin Description
1 5V power supply positive 5V
2 GND power supply cathode
3 VBAT lithium battery cathode 3.7-4.2V
4 L+/L-left audio channel output (directly connected to the horn)
5 R+/R - right audio channel output (directly connected to the horn)
Product description:
1. Power supply: Type-C 5V can be directly used for power supply, or another 5V power supply or 3.7V lithium battery can be connected (as shown in the figure below). Note that the power supply interfaces of 5V and 3.7V are different. 5V is connected to 5V and GND, and 3.7V lithium battery is connected to VBAT and GND.
2. The maximum working current is 5V2A. It is recommended to use 5V2A regulated power supply for power supply with better sound quality.
3. Support USB sound card, drive free (plug and play). Connect the module to the computer with USB data cable, and the computer can play music through the amplifier output of the module
4. Audio output: output stereo audio signals of left and right channels, which can be connected to two 2-8 ¥Ø and 3-5W speakers respectively, and 4 ¥Ø 5W speakers are used for push storage.
5. This product has its own dual 5W power amplifier circuit, so it must not be connected to another power amplifier for use! The outputs of the two power amplifiers cannot be connected in parallel or the negative poles can be connected together, otherwise the power amplifier chip will be damaged.
matters needing attention:
Signal interference: The Bluetooth antenna is extremely vulnerable to high-frequency or strong electromagnetic signal interference, and it should be placed as far away from wireless devices as possible. And the board shall not be close to metal objects, and a certain distance shall be kept.
If there is a current noise on the power amplifier board, which is caused by the interference of the ground wire, it is recommended that the Bluetooth module output terminal should not use the plug wire, and the wire should be soldered, especially the ground wire. The wire should not be too long, the shorter the better, and the thicker the wire should be. For the problem of audio grounding at the power amplifier board grounding point, it needs to be connected to the ground of the audio input terminal of the power amplifier. This grounding point can be welded at different positions to achieve the lowest current sound. It is recommended that the Bluetooth and power amplifier board be powered separately, and the Bluetooth ground and power amplifier ground should be isolated.
As this product is designed as a bare board, do not touch the components on the board with your hands as much as possible, which may lead to static electricity killing the chip and causing burning.
Package include:
1x module
1x flat cable
2x terminal