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Products Description
Mood Light Bluetooth Speakers for Home
The Bluetooth speaker comes with 64 million colors of lights, which will change and flicker with the speed of the music. When the volume of the Bluetooth device is at 80-90% of the total volume, the light will flicker at a high frequency with the speed of the music. When the volume of the Bluetooth device is at 70-80% of the total volume, the light will flicker at a low frequency with the speed of the music. When the volume of the Bluetooth device is below 70% of the total volume, all 64 million colors of lights will be automatically turned off, and the Bluetooth speaker system will automatically enter the hypnosis mode. At this time, the sound it plays is like a lullaby, giving people a comfortable rest environment. In addition, press and hold the power button for 3 seconds, and the Bluetooth speaker will enter the night light mode (i.e. warm white light lighting mode).

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Analysis of Bluetooth Speaker Schematic Diagram – Structure and Function
Introduction
In the previous chapters, we have discussed the delay problem of Bluetooth speakers and its solution. In this chapter, we will analyze the structure and function of Bluetooth speakers to help readers understand the working principle and design points of Bluetooth speakers more deeply.

## Structure and Function of Bluetooth Speakers
As a wireless speaker, the structure and function of Bluetooth speakers have changed a lot compared with traditional speakers. Let’s take a typical Bluetooth speaker as an example to analyze its structure and function in detail.
### 1. Bluetooth module
The Bluetooth module is the core part of the Bluetooth speaker and is responsible for wireless connection with mobile phones, tablets and other devices. The Bluetooth module usually includes a Bluetooth chip, an antenna, a power management circuit, etc. Among them, the Bluetooth chip is responsible for implementing the Bluetooth protocol, the antenna is responsible for receiving and sending wireless signals, and the power management circuit is responsible for providing a stable power supply for the Bluetooth chip.
### 2. Audio Processing Module
The audio processing module is responsible for processing the received audio signal, including amplification, filtering, tuning, etc. Common audio processing modules include power amplifier chips, digital signal processors (DSPs), audio codecs, etc.
### 3. Power amplifier module
The power amplifier module is responsible for amplifying the audio signal to sufficient power to drive the speaker to make sound. The power amplifier module usually includes a power amplifier, a power management circuit, etc. There are many types of power amplifiers, such as Class A, Class B, Class D, etc. Different types of power amplifiers have different performance and application scenarios.
### 4. Speaker unit
The speaker unit is the sound-generating part of the Bluetooth speaker, which is responsible for converting the electrical signal output by the power amplifier module into sound. There are many types of speaker units, including cone speakers, flat speakers, spherical speakers, etc. Different speaker units have different sound quality performance and applicable scenarios.
### 5. Battery module
The battery module provides power for the Bluetooth speaker, making it wireless and portable. The battery module usually includes lithium batteries, battery management systems, etc. Lithium batteries are widely used in Bluetooth speakers and other fields due to their high energy density and long life.
### 6. Control system
The control system is responsible for realizing various functions of the Bluetooth speaker, including power on and off, volume adjustment, mode switching, etc. The control system can be implemented through physical buttons, touch screens, voice control, etc.
### 7. Interface and connection part
Bluetooth speakers usually provide multiple interfaces for connecting with external devices. Common interfaces include USB interface, AUX interface, headphone interface, etc. In addition, Bluetooth speakers may also support connection with smart home devices, such as pairing with smart speakers.
## Working principle of Bluetooth speakers
After understanding the structure and function of Bluetooth speakers, let’s analyze its working principle.
### 1. Connection and pairing
When users want to use Bluetooth speakers, they first need to connect and pair them with mobile phones, tablets and other devices. During the connection process, the Bluetooth module will search for surrounding Bluetooth devices and display a list of available devices. Users select the corresponding Bluetooth speaker on mobile phones and other devices to pair. After successful pairing, a stable connection will be established between the two to achieve wireless data transmission.
### 2. Audio signal transmission
After successful pairing, mobile phones and other devices will send audio signals to Bluetooth speakers through the Bluetooth module. After the Bluetooth speaker receives the audio signal, the audio processing module will process the signal, such as amplification, tuning, etc., and then transmit it to the power amplifier module.
### 3. Sound output
The power amplifier module amplifies the processed audio signal to sufficient power and drives the speaker unit to produce sound. After a series of audio processing, the end user can hear clear and three-dimensional music.

## Conclusion
Through the analysis of this chapter, we have a deeper understanding of the structure and function of Bluetooth speakers. As a new type of wireless speaker, the design of Bluetooth speakers involves the collaborative work of multiple modules. Mastering the working principle of Bluetooth speakers will help us better understand and evaluate the performance and applicable scenarios of Bluetooth speakers during the purchase and use process.