Make your own loud Bluetooth Speaker easy explained, cheap and handy to use for less then 14$.
Maybe you have some components which you don't need to buy like 3W speakers to make it less expensive.
In the following steps I will try to explain on the easiest way how to assemble this bluetooth speaker, people who don't know a lot of electronics will understand I hope, because I didn't know a lot about speakers,amplifiers and bluetooth stuff before making this speaker.
This speaker has a long battery life when you use good 18650 lithium batteries.
I found 3x 18650 lithium batteries which I used in parallel and has a total of 6600mah, the speaker plays 22 hours on the highest volume which is very loud.
You can charge the speaker with a micro USB, which is very handy!
In the next video I will show you the finished speaker and play a song to show you.
Step 1: Collect the Parts You Need
Collect the parts
What do you need?
- Bluetooth Stereo Audio Module:Ebay
If you wanna use a more easy and cheaper way, choose for the bluetooth audio USB, Very easy to connect and longer bluetooth distance! Check my other instructable were I used the bluetooth usb for the connections ;)
- Micro usb Charger module 5V 1A:Ebay
If you want a undervoltage protection to you can use this Micro usb protected charging module.
Check my other instructable were I used this protected charging module for the connections ;)
- 2x3W Amplifier:Ebay
I Should really recommand THIS Amplifier if you use a bluetooth audio USB, after I building it with the normal one I deccided to add a volume switch because the bluetooth usb has a very loud startup sound!
- 2 Speakers 3W 4Ω:Ebay
These speakers had good reviews and the sound is very good for there size!
or Ebay -> These are 8Ω 3W speakers which will sound more clear then 4Ω but not that loud.
- 3.7V Lithium 18650 Battery:NKON
I found my lithium battery in a router/modem, you can easy find them in laptop batteries, the battery of a drill or other electrical stuff. You just need a 3.7V Lithium Battery (You can also buy them on the internet)
I would really recommend to search very good after these because they aren't cheap
- Capacitor: 100µF capacitor
- Small wires and a switch
Step 2: Put the Parts Together
Put the parts together
Connect the parts with wires which you can see in the picture.
It's easy to glue the bluetooth module to a circuit board to make it stronger because otherwise the wires will snap from the module I guess.
You can also add buttons on the bluetooth module to change volume, pauze or play a song and go to the next song, but I didn't do that in my bluetooth speaker.
In the next video, I will do a quick test of the speaker with a voltage source instead of a battery, but it works the same. Also watch my video below where I play a song when the speaker is totally finished ! :)
Step 3: Put Everything in the Cover
Here are some pictures during the assemblage of the speaker.
First I wanted to make the cover out of wood, this would give you an excellent audio quality.
After a while I decided to put the speakers into a pvc T-profile with a diametre of 50mm.
It's much more easy to make and it looks original to me :)
It is very compact and it sounds great You can find the T-profiles in your local store which costs only 2$ or on the internet.
Step 4: Giving the Final Touch to the Speaker
I also putted a grill on it to protect the speaker.
Thanks to my friend Robbe Derks who helped me a lot !!!