DIY Bluetooth Boombox

I made this project after seeing ASCAS Instructable. I wanted to make my own version that had a louder output and was more simpler by eliminating the need for a separate aux jack. In this case the aux jack for my project is attached already to the bluetooth module. This Bluetooth boombox has a simple interface and is easy to use. All you have to due is let the battery charge and then connect it to your phone and start blasting some tunes.

Specifications

Dual 3w 8ohm speakers [ohm doesn't really matter ]

15m bluetooth range

audio jack and any type of cellular device

portable and uses a 3.7 to 5 volt rechargeable battery.

Also if you enjoyed this project please vote for it in the contests that they are in. Thank You

Step 1: Materials

The price bill in total come up to 10 dollars or so.

The speakers I used are salvage from an old boombox from like the 90s. It was in quite bad condition so I took the speakers before I threw it out.

• Lithium Battery Charger $2.50
• Amplifier $3.77
• Bluetooth Module $4.83
• Some Wires - free
• Salvage or bought speakers[You can use one or two speakers]
• Enclosure [I used an old pencil box]
• Phone Battery

Step 2: Step 2: Placement

Okay first thing I did was create holes in my housing unit. I did not have any official tools like a saw or cutter so I had to do everything with a scissors and pliers. I pretty sure if you have the proper tools you could make your holes way more neater.

Then I placed the speakers in the holes I made for them and hot glued them. Make sure that their are no air gaps because you don't want the speakers to be losing sound. Also not pictured is holes for the switch, audio jack and charger.

Step 3: Step 3: Solder Components

The original circuit here was contributed to ASCAS. I made some minor changes to make it easier for me to make, read the notes if you wanna see how.

For the aux cable jack instead of cutting off the aux end I just solder the wires directly on to it. The Tip is the left line, the middle is the right line, and the top is the gnd line.

Then I solder terminals on to the lithium charger which I then connected to the battery. As you can see you can kinda get away with messing up the plastic housing. But please do not allow the soldering iron to sit for more than 10 seconds on the terminals or it can blow up or be badly damaged.

Then I solder on the connections for the switch and finally I solder all the connections onto the amplifier board.

Everything is ready to be put in place and start blasting some tunes.

Step 4: DONE!

Put everything in the right place and the speakers will be soon ready to start blasting some tunes.

1. Turn on the device and make sure the battery is charged
2. Go on to your mobile device and look for the name of the bluetooth module
3. Play music from your device and it should starting playing right away.

Comments

[yrula8]

Well, I didn't make it. I bought the items for my son so he could make it. He is really interested in electronics/robotics. Like you, he grabs every used electronic items he can and takes them apart to learn how it works. This is a cool project for him to build. Thanks for the Instructable!

[Kante Tech]

Thats the best thing a parent could do, is to encourage their child hobbies. Thanks and I hope he has fun.

[JakeA34]

Hi! This is a great instructible. Just like many other boom box instructions on this site, I built this one. But I bought the parts and me and my 10 year old cousin built this. He loves electronics. Later, I built my own one of these. I substituted the pam8403 for the pam8610. I also used 20 watt 16ohm speakers. It is my favorite boombox in my collection. My cousin loves it too. He loves hanging out and listening to it. Thanks for posting!

[tmoney45]

When the bluetooh modules and the amplifier share the same power it make a piiiiiiii sound

[tmoney45]

When the bluetooh modules and the amplifier share the same power it make a piiiiiiii sound

[tmoney45]

How did powered the bluetooh module. And does it shares same power as the amplifier.

[debas]

Good job on your project! I'll try to do this but without the bluetooth part (just need the aux jack).

Anyway, on the video I couldn't help notice the big capacitor soldered on one of the speaker. Is that mandatory? Can you elaborate please? Thanks

[gabe.crawford.562]

the capacitor is to help regulate sound and remove static as far as i know but dont take my word for it

[Hassanul_]

I'm gonna make this my next project, but I'm gonna use one of those cheap mobile USB power bank I have for the batteries! Anyway good job!!

[Kante Tech]

Make sure it keeps a steady output of 3.7 to 5 volts. Anything higher could fry the circuit board.

[irmark88]

Don't know your knowledge level, but I made something similar from a Lenoxx Sound radio. Sound has gotten much clearer, but I don't have super clear sound. Is yours crystal clear?

[Kante Tech]

This radio has an alright clarity depending on what you use. I don't have an advance radio knowledge so I wouldn't know if a Lenoxx has a better sound system.

[jaycrash]

Sick dude !

[coachtsb]

Thanks brosky. Udaman!!!

[coachtsb]

Very cool my man. Could you tell me how much run time you get? How do you charge it (simple wall charger)? I know it's a pretty dumb question

[Kante Tech]

The run time could go to from 3 to 5 hours. And also you should note that the charger circuit is already attached so all you have to do is use anything that allows for an USB input the wall charger, laptop and so on. Also it is fairly loud. I say it could power a small room. Don't except a whole festival lol.

[coachtsb]

Also, how loud? Thanks

[Sonic the Hedgehog]

Way past cool! Try pumping His World Zebrahead, Live and Learn, or City Escape through one of those. I especially like it because it has Bluetooth

[Kante Tech]

Thanks dude! I'm more of a Kanye and Hip-Hop fan but I love new music and will check out those 3 songs.

[gdavid4]

good job ! very easy,perfect for me :) but where did you find the bluetooth ?