How to Build a Bluetooth Speaker for Under $10 Using Scrap Electronics


Building your own Bluetooth speaker using spare parts and electronics you have lying around is a fun and inexpensive project that anyone can do. In this guide, I will walk you through step-by-step how to build a Bluetooth speaker for under $10 using scrap electronics and parts.

Gathering Materials and Tools

The great thing about this project is that you likely already have most, if not all, of the materials needed. Here's what you'll need:



Circuitry and Wiring

The wiring for this project is very straightforward. Here are the steps:

  1. Connect the speaker driver to the speaker output pins on the amplifier board using speaker wire. Make sure to observe polarity.

  2. Connect power to the amplifier board. I soldered wires from my battery pack to the power input pins.

  3. Add a switch (optional) between the battery pack and amplifier to turn it on and off.

  4. Connect a Bluetooth module (optional). I soldered the audio out pin to the amplifier input.

Use diagrams or photos to help illustrate the wiring. The key is connecting the amplifier output to the speaker driver input correctly using speaker wire. Powering the amp and connecting audio input like Bluetooth is fairly simple.

Constructing the Housing

The housing for the speaker can be anything you have on hand. I used a small tin box which worked perfectly. Here's how I put mine together:

Finishing Touches

To complete the speaker:

And that's it! Now you have a custom Bluetooth speaker you can use anywhere. The total cost was under $10 since I used spare parts and salvaged materials.


If you complete the project but get no sound, here are some things to check:

With a bit of tweaking, you should be able to get it working! Building and troubleshooting is part of the fun.

Closing Thoughts

Constructing your own Bluetooth speaker is an enjoyable electronics project that can be done on the cheap. With scavenged parts and a spare amplifier module, you can build one for under $10. Not only is it inexpensive, but it's the perfect way to recycle old electronics and learn new skills along the way. So gather up those spare parts and start building!