Creating a Bluetooth Speaker

Support
1

Hey guys

I’m looking to make a really simple/minimal Bluetooth speaker. (maybe not so simple)

Basically I need a Bluetooth module that I can wire a speaker too, and connect a small lithium ion battery for power.

In turn this set up needs to allow me to sync to my phone (like any other bluetooth speaker) and play audio.

Your help is greatly appreciated guys. Cheers.

2

Hi Cohan,

What a great idea :slight_smile: You’re going to need a bluetooth module that can do A2DP. Often the simplest way to do something like this is to use a USB power bank along with a small USB powered bluetooth handsfree kit, and a USB powered speaker, all bundled into a case.

If you want to dive into some lower level stuff I’d recommend checking out the following products:








Regards,
Oliver
Support | Core Electronics

3

Thanks Oliver for your response.

I have a couple of items in my cart… See attached.

Is this all I would need to make a simple Bluetooth speaker?

I already have my speaker and wire etc.

Screen Shot 2020-09-28 at 2.06.36 pm.png
Screen Shot 2020-09-28 at 2.06.36 pm.png656×916 75.3 KB

Thank you in advance for your assistance mate, I am very new to this sort of stuff.

Cheers

4

Hi Cohan,

You’ll also need a way to hook everything up, and a speaker or stereo to connect it to, but otherwise yep, that should do it.

Regards,
Oliver
Support | Core Electronics

5

Perfect, I have micro USB, speaker, wire etc.

Thank you

1 Like
6

Hey Oliver

Hope you are well mate.

I purchased the Bluetooth 5.0 Audio Receiver w Board-Controllable Volume from you guys and I was wondering do I need an amp connected to this board with a wired speaker connected to that, or can connect a wired speaker directly to the board? If so where?

I know the bluetooth board has a 3.5mm audio out but I was wanting to wire a small speaker to it.

Cheers

7

Hey Cohan,

You can add an amp if you’d like. However, the board should be suitable for any small speaker that you’re connecting to that 3.5mm jack directly, if you find it’s too quiet let us know and I’ll see what amps we’ve got available in our local stock to increase the output for you. If there’s anything else that I can do for you please let me know.

Bryce
Core Electronics | Support

8

Thanks Bryce,

I have wired a 4ohm 3w speaker to a 3.5mm jack and plugged it in, it is far too quite for what I need, what mini amp would you recommend?

Cheers

9

Hey Cohan,

Ah okay. If you’re looking for something that’ll provide stereo while amplifier your signal sufficiently, the kit below once assembled (and soldered) should provide more than enough power for your speaker, make sure not too push it too far though, as it’d be pretty easy to burn out the copper with excess current in those speakers.

Below is one of @Oliver s original suggestions for you to increase the signal.

Bryce
Core Electronics | Support

10

Cheers mate

Probably a little too far, for headphone the board is fine, but when I connect a speaker it doesn’t seem to be any loader then if I turn up the headphones and leave them out?

I was thinking about the Adafruit Mono 2.5W Class D Audio Amplifier as I am only running one speaker… Thinking a setup something like this… (attached).

BUT do you have something that could power the amp?

Thank you for your time guys, it is much appreciated.

image.jpg
image.jpg2000×1500 1.76 MB

11

Hi Cohan,

Heres the supply voltage(and some other specs) for the amplifier board:image
found on the datasheet: https://cdn-shop.adafruit.com/datasheets/PAM8302A.pdf

You should be able to power both the Bluetooth module and amp with a Lipo Battery or Power supply given they are both in the respective voltage ranges,

or a 5V power supply as you may already be using with the input module.

PS: Here are the Vin pins of the amp
image

Let me know if you need a hand with anything!

Cheers,
Liam.