Instructables
Picture of Portable - Mini Amplifier Speaker
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In this instructable, I will show you how to make a simple amplifier speaker with common components, it's not just simple but portable. It uses LM386N IC which is a low voltage audio power amplifier. When the project is finished you will have a working simple circuit that can connect with any device as an input, such as Ipod, MP3 player, even your laptop and PC.

This is the video of my portable amplifier speaker
(change the quality for a better view)



The sound quality of this circuit is pretty good.


OK, lets get started!
 
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Step 1: Parts and tools

Picture of Parts and tools
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Here is all you will need:
- (1) Small drug case
- (1) Perfboard
- (1) IC LM 386
- (1) 8 Pin DIP IC Socket
- (1) 3.5mm stereo jack female
- (2) 3.5mm stereo jack male
- (1) Potensio 5K
- (1) Potensio 1K
- (2) Potensio Knob (optional)
- (1) Resistor 10 Ohm
- (2) Ceramic Capacitor 0,01uF
- (1) Electrolit Capacitor 100uF
- (1) Electrolit Capacitor 220uF
- (1) Speaker 8 Ohm (0,5 - 0,6 watt)
- (1) 9 V battery
- (1) 9 V battery Clip
- (1) On-off Switch
- Shrink tubing
- Jumper wire
- Rainbow wire (optional)
- Male header extended (optional)
- Blackhousing / female 1x1 header (optional)

Tools:
- Soldering iron
- Solder
- Hot glue
- Mini drill
- Pliers
- Cutter
- Helping hands (if you don't have it, you can build it from my helping hands instructable)

Step 2: Making the circuit on breadboard

Picture of Making the circuit on breadboard
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First, lets put the components on a breadboard so we could see how it worked and how to fit it onto the perfboard. The circuit diagram was made with Fritzing.

The schematic was made with Altium Designer.

Test everything out and make sure that you're circuit is going to work before you start soldering.
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jundi933 months ago

How can I connect an LED ? it would be great if you can show it on the breadboard :)

http://www.instructables.com/id/Portable-Speaker-1/

JeromeS1 month ago

can someone help me about this experiment?

would it still work if i dont use LM 386 chip because i dont have one of those?

is there other chip that i can use other than this?

Dude the amp is must. Else the volume will be so low that one needs to bring it near ears.

how much is the approx estimate of all the components

ceironic1 month ago

I have a question. I havent started this yet but I'll be soon,but i wana power it from 9V transformator (DC) and want to have two speakers. Although I'm consirned that its not going to be loud enough, so I wanna ask what if I replaced the lm386 with TBA820M, and also what would i have to chang ein this circuit. thanks for answer, if ever

can i build the circuit without using Potensio 5K and Potensio 1K , what happen if i do not use it

can i build the circuit without using Potensio 5K and Potensio 1K , what happen if i do not use it

can i build the circuit without using Potensio 5K and Potensio 1K , what happen if i do not use it

can i build the circuit without using Potensio 5K and Potensio 1K , what happen if i do not use it

can i build the circuit without using Potensio 5K and Potensio 1K

Divergence2 months ago
Can you use a tda2050 or lm1875 in instead?
shekzz.rock4 months ago
Can u please guide me how can I use 8 ohms 3 watts 2 speaker. Way differences will have to make to amp..
*wat difference will have to make to amp..
yinkusben4 months ago
nice instructable...lemme go do it
rodelo.luspo5 months ago

Can i use a speaker which is 8 ohms and 5 watts???

faziefazie (author)  rodelo.luspo5 months ago
Actually I never try it so I didn't know it will work with speaker 5 watts or not. but if you want to prove it, you can try first on the protoboard before soldering in PCB.

its ok dude...

i have already asked my instructor for this subject of what wattage of speaker should i used..

and i used speaker which is 8 ohms and 2 watts

and it works...

your circuit dude is very awesome...

it really work..

faziefazie (author)  rodelo.luspo5 months ago

I'm glad to hear that your circuit worked :)

p.s: I'm a girl :p

sorry my bad..

faziefazie (author)  rodelo.luspo4 months ago

hahaha it's okay :)

My first ever instructable.

I didnt put it in a container because my instructor wanted to see it inside.

This is my first time to make and solder a circuit in the PCB.

Thanks for the circuit.

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SKYuvraj5 months ago
thankx.it is working.nice ckt diagram. very easy way.

how to recharge the battery when it in use

D joe c5 months ago
Kevin Marshall made it!6 months ago

I love it. A few things to add but it works like a charm. Thanks again.

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faziefazie (author)  Kevin Marshall5 months ago

wow that's awesome man, keep up the good work :)

and congratulations for your first home made speaker, cheers!!

Thanks again for the instructable. Here are some pictures of the finished article. I use it a lot. Cheers

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rabbitpig096 months ago

Hello! I'm making this as my project in Electronics. Mind if I ask you, how many volts is the Electrolit Capacitor 100uF and the Electrolit Capacitor 220uF. I would really appreciate it if you reply asap lol. I really need it now. Thank you!!! :)

faziefazie (author)  rabbitpig095 months ago

Hi, first I want to apologize for my really late reply. I'm very busy lately so I can't open instructables frequently due to my final project at college.

for answer your question, I'm using capacitor which is use 16V or 25V.

Suppose i want to connect two speakers,then what changes should i make?

faziefazie (author)  himanshu.maurya.7545 months ago

You should read this guy instructables, he just made with two speaker based on my instructables here. http://www.instructables.com/member/Kevin+Marshall/

faziefazie (author)  himanshu.maurya.7545 months ago

You should read this guy instructables, he just made with two speaker based on my instructables here. http://www.instructables.com/member/Kevin+Marshall/

GanHamdi5 months ago

gan nama lain IC LM 386 itu apaan sih gan soal.a saya mau beli tapi ga' tau nama.a

faziefazie (author)  GanHamdi5 months ago
sebutan lainnya JRC386, tp terkenalnya LM 386. Dan biasanya kalo mau nyari bilangnya ya IC LM 386.
kode 386 nya itu yg penting, soalnya beda kode bisa beda rangkaian di dalam IC nya. atau pas nyari bilang cari IC audio amplifier. kalo bisa yg ukuran dan skematiknya gak jauh beda dari LM 386.
D joe c5 months ago
Kevin Marshall made it!6 months ago

My first ever instructable. Thank you very much. All works well Just need to find a container! Very good job.

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JeevakK6 months ago

what modifications should i make to connect a 4 ohm 3 watt speaker o this amp

kunfu.wall6 months ago

this is great diagam. it's work ~

thnx......

faziefazie (author)  kunfu.wall6 months ago
You're welcome :)
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