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

faziefazie (author)  rodelo.luspo18 days 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.luspo17 days ago

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

p.s: I'm a girl :p

sorry my bad..

faziefazie (author)  rodelo.luspo14 days 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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SKYuvraj15 days ago
thankx.it is working.nice ckt diagram. very easy way.

how to recharge the battery when it in use

D joe c17 days ago
Kevin Marshall made it!1 month ago

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

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faziefazie (author)  Kevin Marshall18 days 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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rabbitpig091 month 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)  rabbitpig0918 days 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.75418 days 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.75418 days 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/

GanHamdi25 days ago

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

faziefazie (author)  GanHamdi18 days 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 c21 days ago
Kevin Marshall made it!1 month 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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JeevakK1 month ago

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

kunfu.wall2 months ago

this is great diagam. it's work ~

thnx......

faziefazie (author)  kunfu.wall2 months ago
You're welcome :)
sbanka3 months ago

i made it on breadboard but it is not working ....

i think this cirtuit diagram is wrong

sbanka sbanka3 months ago

and i have to submit this amplifier tommorow what should i d.......???

faziefazie (author)  sbanka3 months ago
re-check your components and wiring, there's no problem with the circuit diagram!!!
faziefazie (author)  sbanka3 months ago
I made it with my circuit diagram and it's work until now,
and some people who tried it have also successfully. So I think there's no problem with it. Don't say it a bad circuit before you re-check your own components and your circuit.
faziefazie (author)  sbanka3 months ago
I made it with my circuit diagram and it's working until now, and some people who tried it have also successfully. So I think there's no problem with it. So don't say it's bad circuit if you didn't re-check your own circuit, your components that you used.
sbanka3 months ago

good

faziefazie (author)  sbanka3 months ago
Thanks :)
sbanka faziefazie3 months ago

its bad circuit not working

3dw4rd3 months ago

ok makasih ya sist

3dw4rd 3dw4rd3 months ago

sist sorry bukan tak masukin fb tapi buat buku aja

pocokk3 months ago

Go for the PWM Class - D Amp, out there so many cheapie IC available and easily boost 2w-3w.

3dw4rd3 months ago

sist instructables nya boleh saya pakek saya masukan fb dan saya bikin buku skema boleh gak

faziefazie (author)  3dw4rd3 months ago

Silahkan aja, asal sumbernya dicantumkan dengan jelas, agar tidak terjadi pembajakan hak cipta karya. Dan tolong kasih link FB nya ke saya juga ya.

faziefazie (author)  faziefazie3 months ago

cantumkan sumbernya link ke halaman instructables ini ya.

3dw4rd3 months ago

sist instructables nya boleh saya pakek saya masukan fb dan saya bikin buku skema boleh gak

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