In this project, we will have a look at a simple way to convert your cheap USB speakers to something that sounds better, looks unique and is Bluetooth.
Treasure chest Bluetooth Speaker
I made one of these a year ago. I was impressed with the sound, look and the Bluetooth function, so I decided to make another improved version.
What do you need?
- Mini treasure chest
- USB Speakers
- Bluetooth 3.5mm Audio transmitter
You can get them super cheap on eBay
- Illuminated rocker switch
- Cable with the plug
- 2 x USB wall chargers
- Female spade connectors
- Heat-shrink tubing or electrical tape
You can also see the video.
I drilled holes for the speakers, cable and the switch.
I used some acrylic paint, so newly drilled holes don't stand out.
At this point, I thought I'll go for the same look that my old speaker had. That's why, I painted more parts that it was necessary.
I took apart the cheap USB speaker.
It sounded very bad.
What can you expect from a thin plastic, that you can cut with the knife?
To avoid unnecessary soldering, I cut out all the cables from the plastic case.
I decided to use the front part from the speakers.
Using nail polish remover, I got rid of the logo.
Then, I glued speakers to the plastic.
I took off the plug from USB chargers and glued them together.
Then, the wire was fed into the treasure chest and knot tied, so it can't be pulled out.
I decided to use fake leather to decorate around the switch.
I am not sure if it was a good idea. It might have looked better without it.
Then, I attached the connectors to the cables and connected them to the switch.
Connection will depend of the switch you are using.
Not all illuminated switches are wired the same.
I used the plastic fixing from the original speakers, to secure the board.
Then, I plugged in speakers and Bluetooth dongle and the audio cable.
There is not need to access the volume control as all Bluetooth devices can regulate the volume.
I turned the volume to maximum and then turned it down just a little bit.
After making sure that it works, I attached the speakers to the treasure chest using screws.
The sound is very good. Much better and louder than original speakers.
The reason I used 2 x USB chargers instead of a chargers with 2 USB ports is because of the noise.
When I was making my first speaker, there was a noise introduced if Bluetooth dongle and the speaker were powered from the same charger.
Using 2 chargers solved the problem.
In the picture you can also see my first speaker.