Introduction: 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.

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!!!

Comments

author
MayurY1 made it!(author)2016-04-26

how is its bass ??

author
Lima79 made it!(author)2017-03-03

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.

author
Lima79 made it!(author)2017-03-03

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.

author
123+go+ made it!(author)2016-02-10

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

author
JakeM45 made it!(author)2016-01-23

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

author
ROWAN%C2%A7 made it!(author)2016-01-12

How much were the components all together??

author
rgada1 made it!(author)2014-05-11

can u tell me hws much volts are the capacitor of?? plzz..Thank You

author
gerry.serafica.1 made it!(author)2015-11-10

same here..

author
Cheese101 made it!(author)2015-10-15

Can I use a breadboard instead of PCB

author
Anargopunk made it!(author)2015-11-01

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

author
MrSteaker made it!(author)2015-09-23

Do i need 9 volt battery or 5v?

author
Cheese101 made it!(author)2015-10-15

9v

author
Cheese101 made it!(author)2015-10-15

Can I use a bread board instead of PCB

author
DonJoF made it!(author)2015-09-09

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

author
wobbler made it!(author)2015-08-10

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.

author
KosherAnt made it!(author)2015-04-10

Bluetooth?

author
MichaelD27 made it!(author)2015-05-01

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.

author
nancyjohns made it!(author)2015-04-17

Hey! He copied ur 'ible exactly!!! This is no fair for u.

author
DubMonster made it!(author)2015-03-21

where i can get amplifier without building it

this is awesome instructable

author
Supernerd+Sven made it!(author)2015-01-22

Thanks for the circuit! I went a little lower budget and used whatever I had around. Someone asked me why I didn't just taking the output from an MP3 player directly, so now I'm curious now its power output.

Portable speaker.jpg
author
Supernerd+Sven made it!(author)2015-02-02

An update - I compared this to my iPod's unboosted output with my old oscilloscope. The tone-generating app I was using put out a node-to-antinode voltage of about 20mV (unless I misread it) and this circuit rendered it fifty times higher at 1V!

author
rajamurugan111 made it!(author)2015-01-03

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

author
mr.pipboy33 made it!(author)2015-01-01

What do I need to connect to the audio jack. Please respond as soon as possible

author
Triotip made it!(author)2014-12-21

Brilliant instructable mate. Quite easy to follow, however I reckon you made your final circuit more complex and bulky than necessary, but hey, whatever gets the job done works I guess.

author
Ayush+Sharma made it!(author)2014-02-06

Can i power it with a 3.7v mobile battery?

author
Triotip made it!(author)2014-12-21

nope

author
piedrabob78 made it!(author)2014-12-03

based on this instructable should I use 6 capacitators ?

author
Triotip made it!(author)2014-12-21

Nope, you only need 3: 2x 220 uf capacitors and 1x 10 uf capacitor.

author
Triotip made it!(author)2014-12-21

Brilliant instructable mate. Quite easy to follow, however I reckon you made your final circuit more complex and bulky than necessary, but hey, whatever gets the job done works I guess.

author
dillono made it!(author)2014-11-21

poop

author
dillono made it!(author)2014-11-21

poop

author
dillono made it!(author)2014-11-21

poop

author
dillono made it!(author)2014-11-21

poop

author
John+PaulS made it!(author)2014-10-22

any step by step tutorial for this? cause i dont know how to connect the input and how to bread board it ...............sorry im not very good at electronics

author
John+PaulS made it!(author)2014-10-22

any step by step tutorial for this? cause i dont know how to connect the input and how to bread board it ...............sorry im not very good at electronics

author
niravbrainhacker made it!(author)2014-08-25

Hello sir,

i have index subwoofer which is not in use now

so i need to use it as mobile speaker

so what can i need to do for making it mobile speaker

can i need to use power supply for it and

need any extra circuit ?

i have no knowledge about it please give me instruction

Linn_Index_Woofer.JPGWoofer-110134-06401-1277875352-0.jpg
author
mjoneja made it!(author)2014-06-26

Great I'ble :D
I did have to add a 0.047uF decoupling capacitor at the output and a 0.01uF capacitor at the input to make the audio much better. Yet to package it though...
Tests:
Thanks again for the cool instructable :)

DSC_0701.JPG
author
Silvester+Jay made it!(author)2013-09-26

I've been working on this by following the schematic . . But the only thing is the output is very low . . . like i need to shut off my ears to the surrounding things and get closer to the speaker to hear it . . But when i try to increase the volume its getting distorted . . . Can somebody help me out to fix it . . I haven't used the LED's to save power and running on a 9v battery . .

author
Thauolar made it!(author)2014-04-01

you should Built in a amp sircuit and i think you can use caps on the output to smoothe the sound

author
EthanFMLOO made it!(author)2014-02-20

Does anyone have any ideas on how to make something like this but much bigger?

author
dodo91 made it!(author)2013-09-01

thank you! I was looking for how to build a speaker, with the amplification and everything, so I can make a speaker that is nice and loud for my laptop. Most things I found here were just taking old speakers and taking the board out of it, but I do not have any. I will use this, though I will substitute a battery for USB power. the cords will be attached directly, and will be able to roll up and be tucked into the unit and then closed back up, via a latch.

author
profpat made it!(author)2013-07-17

nice project, but i noticed you wired the blue led's directly, i believe they need a resistor to keep the current low!

author
Ploopy made it!(author)2013-07-03

Use USB power!

author
Mrtorta made it!(author)2013-07-01

How much did it cost to make it?

author
Bobblehead+Einstein made it!(author)2013-06-30

i was gonna say the same thing here........I will post it in the forum...will see if anything comes up

author
LucasBass made it!(author)2013-01-18

Nice tutorial man, I want to make one with 2 speaker, what change will I have to do. What hardware need to be change. can you please update the list for me. and should I use 2 9V cell. and where should I connect the 2nd speaker.. I'm new.

author
darkstranger94 made it!(author)2012-12-17

What are the green wires there for? And are the 220uF Eletrolytic Capacitors suppose to be on the bottom of the PCB board or on top?

author
gbollyneutron made it!(author)2011-11-03

just curious, will it work without the potentiometer

author
Ririshi made it!(author)2012-02-24

Yes, it will work, but you'll have no choice for volume. You should put a trim pot or normal 5K resistor in it, then. But why not just buy a potmeter and place it in to make a volume knob.

author
gbollyneutron made it!(author)2011-11-03

nt sure if my ic connection is rite

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