Bluetooth Speaker With a Beat-Synced LED

The Arduino Bluetooth Speaker with Beat-Synced LED is an exciting DIY project that combines the versatility of Arduino programming with the enjoyment of music and visual effects. This project allows you to create a portable speaker system that wirelessly connects to your Bluetooth-enabled devices, providing an immersive audio experience. With the addition of a beat-synced LED, the speaker visually responds to the rhythm and beats of the music, adding a dynamic and captivating element to your listening experience. By following the step-by-step instructions, you'll have the opportunity to build a personalized and interactive speaker system that brings your favorite music to life.

Before you begin building the Arduino Bluetooth speaker with a beat-synced LED, gather all the necessary materials and components. Here's a bills of materials you will need.

Use a laser cutting machine to cut the case for your Bluetooth speaker. I shared the laser cut file, you can look the scaled version of the outline below. The case will house all the components of the speaker and provide protection and aesthetics.

Build the circuit by connecting the components, including the Arduino board, Bluetooth module, LED, and speaker. Ensure all connections are secure and properly soldered. Open a new sketch in the Arduino IDE and write the code I shared below to control the Bluetooth module, LED, and audio output. This involves initializing the Bluetooth module, configuring it for audio streaming, reading the audio input, analyzing the beats or audio levels, and controlling the LED based on the audio input. Utilize libraries and code examples to simplify the programming process.


Securely attach the built circuit to the bottom layer of the case. Use adhesive, or any suitable method to fix the circuit in place. Don’t forget to place the led in the hole. Make sure it is aligned properly and doesn't move within the case.

Construct the case by assembling the side panels of the enclosure. Ensure they fit together snugly, and consider any openings required for buttons, ports, or the LED.


Install the circuit switch, which will control the power supply to the entire circuit. Connect the necessary wires to the switch and solder them securely. Make sure the switch is easily accessible and functions correctly.


Adhere the top part of the case, which includes the switch, to the rest of the enclosure. Use appropriate adhesive to securely attach the top part to the side panels. Additionally, attach the back panel to complete the construction of the case.

Position the speaker inside the case. Ensure it fits properly and aligns with any speaker openings on the front panel. Solder the necessary connections between the speaker and the circuit board to establish the audio connection.


Bring together all the components of the case, including the side panels, top part, back panel, and speaker. Align them correctly and use screws or other appropriate fasteners to securely assemble the case. Ensure all connections and components are well-secured and the case is stable.