This DIY Bluetooth speaker is a budget-friendly project designed to deliver clear wireless audio using affordable components. With the help of a DIY Bluetooth speaker amplifier, the Bluetooth module sends the audio signal to the amplifier, which then provides the necessary power to drive the speakers. It can also be used for building a DIY Bluetooth portable speaker. The setup is simple, compact, and powerful for anyone looking to make their own portable speaker without spending much. It’s a fun and practical way to learn the basics of electronics.
If you’re interested in this type of project, there are also a few improved versions you can explore. One of them is Simple DIY Wireless Bluetooth Speakers Using an Audio Amplifier, which includes an upgraded amplifier and speaker setup to deliver noticeably better sound performance. Another is the Arduino Bluetooth Speaker with Reactive NeoPixel LEDs, an advanced version that integrates dynamic lighting effects using NeoPixel LEDs for a more interactive experience. These projects are built on the same core concept while adding new features to your DIY Bluetooth speaker.
Components Required
| Components | Description |
| JDY-62 Bluetooth Module | Bluetooth 4.2 audio module used to receive wireless audio signals. |
| PAM8403 Amplifier | A 5V stereo amplifier that boosts the audio output for the speakers |
| 2-Watt 8Ω Speakers | Compact speakers used to output the left and right audio channels. |
| Wires | Used for electrical connections between modules. |
| Soldering Iron | Required to solder wire and ensure stable, long-lasting connections. |
Component Pinouts
JDY-62 BLE 4.2 Module
The JDY-62 enables wireless audio streaming from your phone or device. It can be used for building DIY Bluetooth stereo speakers, handling the Bluetooth connection and sending the audio signal to the amplifier for wireless playback.
| Pin Name | Function | Description |
| VCC | Power Supply | Connect to +5V DC |
| GND | Ground | Connect to ground. |
| L OUT | Left Audio Output | Sends the left channel audio signal to the amplifier. |
| R OUT | Right Audio Output | Sends the right channel audio signal to the amplifier. |
PAM8403 Stereo Amplifier
The PAM8403 is a small, efficient audio amplifier that powers the speakers to produce clear sound. It can be used for creating a DIY Bluetooth stereo, boosting the audio signal from the Bluetooth module so the speakers deliver crisp, high-quality sound.
| Pin Name | Function | Description |
| VCC | Power Supply | Connect to +5V DC |
| GND | Ground | Connect to ground. |
| L IN | Left Audio Input | Connect to the left output from the Bluetooth module. |
| R IN | Right Audio Input | Connect to the right output from the Bluetooth module. |
| L OUT | Left Speaker Output | Connect to the left speaker terminals |
| R OUT | Right Speaker Output | Connect to the right speaker terminals. |
You can also build your own amplifier circuit. If you need some guidance, you can refer to projects like the Simple Arduino Audio Player and Amplifier with LM386 or the Simple Microphone to Speaker Amplifier Circuit.
DIY Bluetooth Speaker Wiring Diagram
The DIY Bluetooth speaker wiring diagram shows the connection between the JDY-62 Bluetooth 4.2 module, the PAM8403 audio amplifier, and the two 2W/8Ω speakers. Using the right DIY Bluetooth speaker components, the Bluetooth module and amplifier share the same 5V power supply, while the left and right audio signals are routed directly from the JDY-62 to the corresponding inputs on the PAM8403. Each speaker is connected to the amplifier’s left and right outputs of the amplifier, enabling the stereo audio setup
When powered on, the device instantly reconnects via Bluetooth if it has been paired with that device before. For a new device, you need to pair it manually. Just look for “JDY-62” in the available Bluetooth devices list. The indicator light confirms the connection status, while the speakers deliver clear, high-quality audio that’s ready to play immediately. This easy connection and good sound quality make it a reliable choice for anyone looking to enjoy wireless audio without any hassle.
Building a DIY Bluetooth speaker on a budget is an easy and fun way to enjoy wireless music while learning basic electronics. With simple components, you can create a portable, clear-sounding speaker without spending much, making it a perfect project for beginners and hobbyists.
FAQs
1. How does Bluetooth pairing work?
Once powered on, the JDY-62 module automatically enters pairing mode. It can connect to your smartphone, laptop, or any Bluetooth-enabled device. No additional configuration is required.
2. Does it require any app or software to work?
No app is needed. It works as a standard Bluetooth audio device, so any device that supports Bluetooth audio can connect to it.
3. Can I use different speakers?
Yes, but make sure the speaker matches the amplifier’s output. Using a higher power speaker without adjusting the circuit may damage the amplifier.
4. How can I make my DIY Bluetooth speaker louder?
Use a more powerful amplifier, a larger speaker, provide stable power, and use short, thick wires to reduce signal loss.
In this post, we will build a Raspberry Pi-based Bluetooth Speaker by fusing the power of A2DP, Linux and an audio codec to stream the data packets from an audio source to an audio sink wirelessly.
Similar DIY Speaker-Based Projects
Previously, we have used different types of speakers to build many interesting projects. If you want to know more about those projects, links are given below.
How to Build an Amazon Alexa Speaker using Raspberry Pi
In this tutorial, I will show you how to build your own DIY version of the Amazon Alexa by installing Alexa Voice Service (AVS) on a Raspberry Pi 4.
Here we use LM386 and a speaker with ESP32 to play music files. The audio output may not be loud, but this application shows the ability of the ESP32 board to play audio files.
ESP32 Based Internet Radio using MAX98357A I2S Amplifier Board
To build our ESP32 web radio, we have chosen the ESP32 development board (obviously) and the MAX98357A I2S Amplifier board.
Raspberry Pi Bluetooth Speaker: Play Audio wirelessly using Raspberry Pi
In this post, we will build a Raspberry Pi-based Bluetooth Speaker by fusing the power of A2DP, Linux and an audio codec to stream the data packets from an audio source to an audio sink wirelessly.
