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How To Make Bluetooth Speakers [Sekhohub.online]

In this post I have made a battery-operated Bluetooth speaker. Creating Bluetooth speakers using the PAM8403 amplifier module is a fun and rewarding DIY project. The PAM8403 is a compact, efficient 3W + 3W stereo class-D audio amplifier ideal for battery-powered applications.

Goal:

Build a stereo Bluetooth speaker using:

PAM8403 amplifier module
Bluetooth audio receiver module (e.g., XS3868, JDY-62, or MH-M18)
Li-ion battery (like 18650) or 5V USB power

Materials for the Project.

1- Bluetooth mp3 player

2- 1X TP4056 battery charging module

3- 1X PAM8403 amplifier module

4- 2X 1.5-inch woofers

5- 1X 3.7v Li-Ion battery

6- 1X on/off switch

7- SOME WIRES

8- 1X cardboard box

Notes:

PAM8403 input pins (L/R) go to the Bluetooth module audio output.
PAM8403 output pins go to the speakers.
Power both modules from the same 5V line.
Ensure proper ground connection between modules.

Assembly Tips

Keep wires short to avoid interference.
Use a 3D-printed or wooden case for better sound.
Add a low-pass filter capacitor to the speaker lines if there’s noise.
Keep PAM8403 inputs away from power lines to reduce hum.

Optional Add-ons

Volume knob (using 10k potentiometer before amp input)
LED power indicator
Passive bass radiator for better low-end sound