Introduction: Making a Bluetooth Solar Powered Speaker
Hey, recently my music players audio port broke :( Instead of fixing it i decided to make an old broken speaker I had lying around bluetooth with some old scrap electronics that had been thrown away.
Heres how you can build your own. Check out the video for Visual instructions.
Step 1: Parts List
For this project you will need the following parts:
- A speaker with the driver board (Mine came from an old portable speaker but you could build your own with off the shelf parts)
- A bluetooth headset (Mine is an old broken bluetooth headset that someone had thrown away because the speaker was broken. Or you could buy an off the shelf bluetooth module here: https://goo.gl/g6ka71 )
- A battery (any 3.7v lithium battery will work. Make sure you pick up a lithium charger if you speaker board doesn't have one build in)
- Casing (Im just using cardboard :D)
- Solar Panel (I added a small solar panel I got from some old fairy lights for a longer battery life. Remember to get a 5v regulator if your solar panel outputs more than 5v)
- Soldering Iron
- Wire stripper
- Glue Gun
- Box Cutter
Step 2: About the Parts
Let's start by looking at the speaker's driver board we need to find these terminals:
- aux input
- battery connector
- usb power input
- power switch
- led indicator Now on the bluetooth board we need to find the
- speaker output
- battery connector
- power button
- led indicator
Lastly on our solar panel we need to get it on its own and locate the power and ground terminals
Step 3: The Wiring
The wiring is pretty simple in thought however it gets messy pretty fast, heres how we wire it up.
- Connect the speaker output on the bluetooth headset to the aux input on the speaker. (ground to ground and speaker + to either of the other two connections)
- Connect both the battery terminals on the speaker and bluetooth headset to your battery (+ to + and - to -)
- connect the usb power in to the solar panel with a diode in-between (check direction in pictures). If you solar panel gives off more than 5v wire a regulator in-between (+ to + and - to -)
- Lastly we want to extent the buttons and LEDs so we can see and use them on the casing. (- to - + to +)
Once its all done give it a test if all goes well we can start making the casing.
Step 4: Designing the Case
Originally i wanted to uses the 18650 lithium battery but i found that it was to big for my case so I ended up using a 400 mAh battery which ended up having a pretty good battery life.
The case I designed is based around the size of the solar panel, so the idea is to design a case that uses the solar panel as the roof and make all the other components fit within it which left me with a cube that slightly resembled a washing machine :D Nevertheless it works and i'm happy with it. My casing was made up of five 4.5cm x 4.5 cm (1,77 inch ) squares with the solar panel on top.
Step 5: Finished Project!
Despite the washing machine look the speaker has a pretty good battery life and can get pretty loud however there is one big downfall, the quality, while playing music everything sounds good with a slight absence of base but when nothing is playing I can hear a very faint static however it clears up when music is played.
Thanks for reading if anything was confusing feel free to drop me a message, leave a comment or check the video for some clarity :D