Portable Speaker




This is one of two portable speaker systems i wanted to build.  I used the LM386 circuit from my previous instructable and incorporated it into this portable speaker system.  It is a single channel (mono) speaker system which lights up blue in the background when you turn it on.  I hope you enjoy this one and feel free to give me suggestions or ask me to clarify anything that may be confusing.

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Step 1: Obtain Parts

All Components (except for Acrylic Sheet) can be found at RadioShack.

Multipurpose PCB with 417 Holes painted black
4.5-9 Volt DC power supply (3 or 4 AA or 9v Battery)
8 Ohm Speaker
Audio Source e.g. iPod
Acrylic Sheet from "Lowe's"
Project box
 2X Blue Square LED's
Mono Audio Jack
8-Pin Retention Contact
IC1      IC                                       LM386 Audio Amp IC
R1      Resistor                            10 Ohm
R2      Resistor                            1K Ohm
R3      Potentiometer                  5K Ohm
R4      Resistor                           10 Ohm
C1      Capacitor                         220 Micro Farad
C2      Capacitor                         10 Micro Farad
C3      Capacitor                         220 Micro Farad

Step 2: Place Components

Arrange components the best you can using the wiring diagram. i placed them as close together as i could, but it may be easier to spread them out a little more or breadboard this circuit first. I highly suggest breadboarding first just to get a feel of the arrangement, prior to soldering.

Step 3: Build Enclosure

I used about a 3 X 4 inch project box from RadioShack that fit the speaker i found appropriately. you can use any size you please, but for me the smaller the better to help with the portability part. I cut and trimmed up an acrylic sheet i got from Lowe's (or possibly Home Depot).  install the standoffs at this point also.  i drilled a small hole (not displayed in any pic) that i fed the battery wires through, the batteries are installed on the outside on the back.

Step 4: Observe Diagram

Look through the wiring diagram to see what components need to be connected to what prior to soldering. This is a modification of my LM386 instructable (https://www.instructables.com/id/LM386-Audio-Amplifier/).

Step 5: Solder Components

Solder components carefully to ensure there are no shorts, also ensure all connections are made at all points.

Step 6: Piece Together and Power On!!!

Trim up the connections and make sure your not forgetting anything.  I suggest testing the circuit prior to putting it together to make sure it works properly.  Once you've tested it, connect the power terminals, screw the PCB board to the standoffs, install the speaker, switch, and jack, then screw down the acrylic sheet into the project box.  Once its put together hook up whatever audio source you have and turn it on and enjoy!!!

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105 Discussions


Reply 2 years ago

Good brother i don't think the bass will be good, if you want a decent
bass then you must use a speaker like "Pioneer-TS-G625" etc or if you
have an old Sony, Philips cassette/CDs-DVDs player then you can use that
speakers, this speakers gives a decent bass.


2 years ago

This is nice, it looks very good in the dark, i think when i build or
get a power supply for my 400watt and a 200watt rms mono amp, i will make
the cabinet just like this one. Thank you good brother for the share.

123 go

3 years ago

what will I do from ground wires means I dint know what is mean by_
pls tell me pls !!!!!


3 years ago

How do i add a charge slot? Do i need another circuit??


3 years ago

How much were the components all together??


Reply 3 years ago

yes but it is a better idea to use pcb instead because its more permanent


4 years ago

Can I use a bread board instead of PCB


4 years ago

What wattage do the rrsistors have? And voltage do the capacitors?


4 years ago on Introduction

Good looking design. However, I'm not sure why you put the 10ohm resistor in the power lead? It's just wasting power by creating a voltage drop for the amp. I'd also only use one LED, but put a dropper resistor in series with it (maybe 47-220ohms), firstly to save power and secondly to protect the LED from over current.


Reply 4 years ago on Introduction

that's a whole different can of worms. Try using an arduino or something like that. Google it, see if you can't find something open source.


4 years ago on Introduction

where i can get amplifier without building it

this is awesome instructable

can i build the circuit without using Potensio 5K ohm what happen if i do not use it