Introduction: Portable Speaker!

Picture of Portable Speaker!

I've been planning to make this for a while now but never had the time. I finally managed to make it. First thing needed are USB Powered Speakers with an AUX cable. I purchased mine at a local Thrifty Shopper for only $2! The goal: Replace USB power with a 9v battery.

Step 1: 5v Regulator

Picture of 5v Regulator

Soldering is needed to make the 5v regulator.

You will need:

  • 9v battery
  • 9v battery clip
  • protoboard
  • 5v regulator
  • 2, 1uF caps
  • on/off switch

I am using a schematic from this page. I added a switch between the battery and the regulator.

After assembling the regulator we will put it aside.

Step 2: Disconnect Speaker

Picture of Disconnect Speaker

Since I'm only going to be using one speaker the other one is useless to me (at least for this project.) I disconnected it and tossed it into my parts box. Then I connected the left and right channels in order to receive both left and right channels from one speaker.

Step 3: Connect 5v Regulator

Picture of Connect 5v Regulator

Follow the USB cable to the circuit board and to be sure, measure the voltage to get the correct polarity. In my case white was (-) and blue was (+).

Then I desoldered the USB cable (save it for another project!) and connected the 5v regulator circuit, red to positive and black to negative.

Step 4: Connect Switch

Picture of Connect Switch

I then made a cut-out for the switch and connected it in series with the battery and the regulator. I attached the battery with Velcro to the inside-top of the speaker.

Step 5: Finished Product!

Picture of Finished Product!

Last thing to do is flip the switch, plug in your aux cable, and enjoy your music!


JakeA34 (author)2016-07-02

This is great. I turned mine into a boom box. Now partying with friends outdoors or hiking is fun! Thanks for posting this!

zikzak1 (author)2014-02-21

These are fun! I made one back in the 70's in a 10" square box, Decent speaker, 8 D batteries, and an amplifier board from an 8 Track car stereo. It was loud, and ate batteries way too fast, but we used it a lot playing frisbee. Best part, had to lug that and a portable cassette deck around on youre bike! Portable cassette recorders werent all that small nor light either! I think i like youre project better. Lots easier to make and not so power hungry!

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