Introduction: How to Make a Bluetooth Speaker

Picture of How to Make a Bluetooth Speaker

UPDATE 8/9/16

This project is now in kit order form on www.kitables.com

Hi, Welcome to my instructable!

Today Ill teach you how to build a DIY Bluetooth speaker. Its extremely easy to make, and great for anyone learning electronics. The best part is you dont need any past experience with electronics! This project is great to practice your soldering skills (Mine clearly need work) and is very fun to use.

I started this project after a nearby neighbor threw away a perfectly good piece of acrylic! Who does that?! Anyway, I recylcled the sheet into a speaker enclosure. If you dont happen to have a piece of acrylic you can buy some online if you would like.

Speaker Features

30m Bluetooth range!

Long Battery life!

Rechargeable!

Loud audio!

Very Cheap to make!

See through case!

Lets Begin!

Step 1: Watch the Video!

Picture of Watch the Video!

Watch the video! Please like comment and subscribe for more!

By the way, I plan on trying to upload new projects every month.

Step 2: Supplies!

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Supplies you will need!

- Acrylic sheet: Optional

- Bluetooth USB Module: This thing is awesome. Plus its cheap!

- Micro usb Charger module 5V 1A: Very cheap, and it came with two!

- 3W Amplifier: I love these things.

- 2 Speakers 3W 4Ω: You could also use two 8Ω speakers, it would be clearer sound, but at the cost of lower volume.

- 3.7V Lithium Battery: This is where a project could become very expensive. I recylcled an old phone battery, you could do the same or buy on off amazon.

- Switch: recycled

Once you ordered your parts, then comes the boring part... waiting :( ... takes forever sometimes...

Step 3: Cut Acrylic

Picture of Cut Acrylic

Now cut out your acrylic box!

I used a jigsaw to cut the acrylic into rectangles

The size of your box will depend on the size or your speakers, but for me the dimensions I used were:

6x15 cm (Four rectangles) and 6x6.5 cm (Two Squares)

Now to glue it!

Step 4: Gluing!

Picture of Gluing!

Now its time to glue the pieces together!

You can use hot glue or superglue, they both work extremely well.

Just make sure to glue exactly at 90 degrees. You dont want to mess up with superglue!

Use a straight edge or a big ruler to help you glue it in place.

Step 5: Speakers!

Picture of Speakers!

Before you glue the last acrylic piece together, place it face down and put your speakers on top of it.

Using a sharpie, slowly trace around the speakers edge.

Now using a dremel or any other cutting drill, cut out the marked area. Be sure to sand down all the plastic burrs afterwords

Then use your hot glue gun and glue them in place!

Step 6: Solder!

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Now solder your circuit together!

Its fairly simple, and great practice for soldering. Now you'll probably have a more neater soldering job then I did, but that's what you get for buying "real" equipment. (I bought my old junky soldering iron and roll of solder for $1 at a garage sale:) )

Step 7: You're Done!

Picture of You're Done!

Charger up your speaker using a micro usb cable, flip the switch and start playing your favorite songs! Its really easy to connect to any phone with Bluetooth capabilities.

You did it!

Please vote for this instrutable in one of the many contests.

Comments

Saahilz (author)2016-11-24

hi , can you help me , i am having issues, i am gettings crackling when i turn the power on, all my connections are solid and correct, is there something i am missing ?

BlueBlood Studios (author)2016-06-26

Does polarity matter. If it does, Am I correct in presuming that you are using the red wire as the positive wire on the circuit diagram

aprasović (author)2016-03-08

hi I'm planning to use 4.2volt li ion batt. with a bit over 6000mah. Can i charge it with phone charger.

you are good .

dmahato (author)aprasović2016-04-17

If you are using lithium ion battery charger module; yes you still can.

As the charger module gives output at 1000mah, using a 2Amps charger would give same charging speed as using a 1Amp charger.

So it would take around 8/9 hours for a full charge a 6000mah battery. And if you are using a lower rating charger (700mah or 800mah) then the charging time will increase.

Do not try to bypass the charger module; unless you got some better rated charger module in mind.

Airborne. (author)2015-12-31

hi, i have made everything like you did but when i try to play music over bluetooth there is a piiiiiiiiiiiiiiiiiiiiiiiiiiii sound and its very ennoying, when i put the volume up the music plays over it but when there is a quiet part in the song it is noticable. when i try to play music over the audio cable (that normally is plugged in the bluetooth module) there is no distrortions. anyone know how i can solve this problem. thanks in advance.

Constructed (author)Airborne.2015-12-31

Yes. Add a ground loop isolator to the circuit. I added mine after I posted this tutorial.

Airborne. (author)Constructed2015-12-31

thanks for the reply, where can i find a ground loop isolator and where do i place the ground loop isolator in the circuit?

Constructed (author)2015-06-23

I've heard it's dangerous to combine two lithium ion batteries. You can use regular AA batteries if you don't care about recharging. However don't use too much or too little voltage! Try to get as close as you can to 3.7v

mdragun (author)Constructed2015-06-24

Okay thanks I'm going to start ordering parts, seems like a fun project. Can I buy a bluetooth module on eBay and use that instead of the usb module ? I appreciate it .

jumpfroggy (author)mdragun2015-06-26

Look up some other bluetooth speakers on instructables. There are a bunch of bluetooth modules you can use that are cheap on ebay (and other places). The difference is often in how they're wired, but many should work.

jumpfroggy (author)jumpfroggy2015-06-26

Also, the "USB bluetooth" adapter in this instructable does not appear to use USB for computer connectivity, only as a source of power. So you could connect any 5V power to it for it to work. Or even better; get a smaller module that doesn't have a USB connector which might be easier to solder up. As long as it works on 5V, it should be fine.

Constructed (author)jumpfroggy2015-06-26

Yes. I just bought the USB version because of the price.

DávidK196 (author)Constructed2015-12-04

i dont get it. the usb bluetooth module is working at 5V how did you get it to work at 3,7? :D

Constructed (author)DávidK1962015-12-04

The module works anywhere from 3-5v

TomK19 made it! (author)2015-09-25

Didn't have any plexi, nor the tools needed to work with it, so I improvised and built mine into a really sturdy cardboard box I had lying around. I placed the micro usb charger right under the lid of the box because I couldn't think of an aesthetically pleasing or practical way to mount it otherwise. I rather like it though, it's discrete and functional. The speakers sound great, it works just as advertised, and the build was relatively easy. Thanks for posting this, great work!

VasylP (author)2015-09-22

Friend, if I put a battery of more than 5V bluetooth burning?

rcolon5 (author)2015-09-20

Whats the name of the song

ej_b1996 (author)2015-08-29

I really want to do this build but I only have 2- 2watt 4ohm speakers lying around. Can I still do it with these speakers or is there something I would need to change to make this build work?

callum201 (author)2015-08-06

What wire is needed to connect the bluetooth module and the Amp?

ianmcmill (author)2015-07-24

The battery is 3.7V but the bluetooth dongle is 5V. How does this work?

PIYUSH SONI (author)2015-07-19

Will this bluetooth module work for this project?

http://www.flipkart.com/rotobotix-bluetooth-module...

mdragun (author)2015-07-12

is anyone able to post a picture or explain how the usb bluetooth is wired I have all the parts just can't seem to find out how the bluetooth is wired thanks all !

tecnocroco (author)2015-07-05

There's no distorsion at the speakers and no noise (piii)?

Constructed (author)tecnocroco2015-07-06

In the beginning yes. Its in the video for a little bit.

tecnocroco (author)Constructed2015-07-07

Oh, to that i found the solution. Yesterday i did the same speaker and there was distorsion, it was caused by the unappropiated voltage. (Sorry for my bad english)

PIYUSH SONI (author)2015-07-07

Thanks for sharing.I will work on it & share my experience soon...

primosanch (author)2015-07-06

Very nice. Thanks for sharing.

PIYUSH SONI (author)2015-07-06

Will it work with every bluetooth enabled devices??

Constructed (author)PIYUSH SONI2015-07-06

Yes

iolanda1 (author)2015-07-05

really nice explained and also I love your strp by step Video

Constructed (author)2015-07-02

Thanks otopico! Expect a new video tomorrow! I'm trying to post every month on the third!

otopico (author)2015-07-02

I love the step by step video. Probably the best one I have seen. I love that you didn't narrate the thing, just let the music play.

GauravM9 (author)2015-06-30

Perfect but I am looking for wifi supported speakers

Kweek (author)2015-06-29

Hey what if you coated the whole inside of the enclosure with kinda swirly hot glue? It might add an artistic flair and mask the edge glue. Especially if you were to add pulsey flashy LED's

Hanzo (author)2015-06-27

That video was really nice. You told about 80+% of the instructable without a word. Excellent work.

wobbler (author)2015-06-27

Nice design and well put together.

Instead of the lithium batteries, it's much cheaper to use 3x AAA NiMh which are usually about 900mAh and will weigh about the same. They and are easily charged using a phone charger or usb adaptor and a suitable current limiting resistor (use C/10 charging rate is easy: www.powerstream.com/NiMH.htm). You can even use 3xAA 2800mAh ones, which will weigh more but give huge run times and still be cheap compared to the equivalent lithium.

michael_nonan (author)2015-06-26

Can you share how you were able to cut the speaker holes using the dremel?

Just watch the video!

lordfloppy (author)2015-06-26

Sorry to be the grammar junky here, but Step 6 should be titled "You're done"

Constructed (author)lordfloppy2015-06-26

Thanks for spotting this. I was all over the place when I wrote this instructable. I just checked back today and realized I was missing a wholde page!

Constructed (author)2015-06-23

Yes! Just use larger batteries! Also it's about 3-5x louder than the phone alone.

mdragun (author)Constructed2015-06-23

Okay thank you. I'm going to try to find a larger battery. would it make sense to buy a two back of AA lithium batteries that have 4000mah? or try to find a phone battery with higher mah ? ebay has a bunch of AA packages cheap

Constructed (author)mdragun2015-06-26

I would choose lithium ion if you want to recharge the speaker. If you have the money available, buy a bigger battery, but I just recylced a samsung phone batttery.

efbe1840 (author)2015-06-26

"6x15 mm (Four rectangles) and 6x6.5 mm (Two Squares)"

I hope You mean cm otherwise it would be very small....

I going to build one.

efbe

Constructed (author)efbe18402015-06-26

Thank you. I did not spot this. Please post a picture if you make one!

Omega31 (author)2015-06-09

Good project, I thought these sorta speakers alos have inbuild min compoter like Intel Edison or rabbery pi. Now I know what happens. But I am still confused as to how and what sort of bluetooth is this? In my knowledge, bluetooth cannot be itself like it needs a computer to manage the data, its just a receiver and transmitter.

jumpfroggy (author)Omega312015-06-26

Most speakers simply use a bluetooth audio receiver. The receiver handles bluetooth connections, and outputs analog audio signals. You can connect these audio signals to the amp/speakers, just like you would a normal audio cable. There's no computer/controller involved, just a simple bluetooth chip.

There are other speakers that are more like "wifi radios", and have a built in computer that handles wifi, audio, streaming, touchscreen UI, etc. Those may or may not have bluetooth as well, but they're a separate type of device.

Most bluetooth speakers you see in the store will not have a computer inside, just a bluetooth receiver like this.

mdragun (author)2015-06-23

s the battery life is only for an hour on this set of speakers , is there a way to increase the battery size maybe ? and are these speakers loud enough for listening with a few people outdoors ? thank you

Constructed (author)2015-06-17

Bryan, the charger modules LED will change from red to blue.

BryanC13 (author)2015-06-17

How would you know if it's done charging?

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Bio: Maker from USA. Follow me to stay up to date on my projects and possible kickstarters! Business email: constructed@mail.com
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