~$10 DIY Bluetooth Speaker

Hi Guys,

This is my first Instructable, so please bear with me :)

I had a few home theater speakers that I was not using and initially I thought I could use the speakers for a Bluetooth speaker build that I was thinking of doing. I was about to remove the speakers from their enclosures, but realized that they were so well made and sounded great, I decided to leave them in their original box.

I used a single Lithium-ion 18650 cell which I salvaged from an old laptop battery pack.

Parts List

TP4056 module: Aliexpress

PCB switch: Aliexpress

18650 Battery Holder: Aliexpress

Bluetooth module: Aliexpress

PAM8403 2x3W Amplifier: Aliexpress

3.5mm Socket: Aliexpress

18650 Battery: GearBest

Tools List

Soldering iron
Solder
Wire
Helping hands

Soldering Time!

Soldering:

Connect the positive terminal of the battery to the "B+" and the negative terminal to the "B-" on the TP4056.
Connect "OUT+" to the left leg of the switch and solder a wire from the middle leg of the switch to the 5V+ connection on the PAM8403
Connect "OUT-" to the 5V- connection on the PAM8403
The PAM8403 is a stereo amp so connect the two speakers by soldering wires from the amp to the speakers as shown in the diagram.
The amp will require input. This input will come from the Bluetooth module. The module is connected to the amp via a 3.5mm jack.

Once all your connections are done:

Turn the Bluetooth module on
Pair to a mobile device
Turn the switch on
Enjoy the music! :)

Done!

Have a look at the video above where I go into detail about each component and a demo!