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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Kevin Marshall made it!yesterday

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

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Kevin Marshall made it!2 days 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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JeevakK3 days ago

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

kunfu.wall11 days ago

this is great diagam. it's work ~

thnx......

faziefazie (author)  kunfu.wall11 days ago
You're welcome :)
sbanka1 month ago

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

i think this cirtuit diagram is wrong

sbanka sbanka1 month ago

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

faziefazie (author)  sbanka1 month ago
re-check your components and wiring, there's no problem with the circuit diagram!!!
faziefazie (author)  sbanka1 month 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)  sbanka1 month 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.
sbanka1 month ago

good

faziefazie (author)  sbanka1 month ago
Thanks :)

its bad circuit not working

3dw4rd1 month ago

ok makasih ya sist

3dw4rd 3dw4rd1 month ago

sist sorry bukan tak masukin fb tapi buat buku aja

pocokk1 month ago

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

3dw4rd1 month ago

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

faziefazie (author)  3dw4rd1 month 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)  faziefazie1 month ago

cantumkan sumbernya link ke halaman instructables ini ya.

3dw4rd1 month ago

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

3dw4rd1 month ago

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

3dw4rd1 month ago

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

3dw4rd1 month ago

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

3dw4rd1 month ago

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

dsp7772 months ago
akramm3 months ago

hello I have 104 capacitor

can I use it ?

faziefazie (author)  akramm3 months ago
hi sorry for my late reply, I've been busy with college stuff.

104 cap was stand for 0.10 uF , i'm using 103 cap which stand for 0.01 uF. I never try it with 104 cap, but if you want to know how it works, build it first in the protoboard, so you can tell your circuit was work.
3dw4rd3 months ago
thank bro i already test and it's work but with my big speaker , in my small 8 ohm 0,5 watt speaker bad sound
faziefazie (author)  3dw4rd3 months ago
if i am not mistaken, the audio power output of the LM386n is around 300mW..
3dw4rd 3dw4rd3 months ago
with my small speaker / 8ohm 0,5 watt is bad sound but in big speaker good sound
faziefazie (author)  3dw4rd3 months ago
ohh, bisa jadi IC nya panas karena harus nge-support speaker yg watt nya besar.

But, congratulations for your own made speaker. Terus berkarya :)
3dw4rd faziefazie3 months ago

mau tanya amplifiernya brp watt ya kok kuat semua speaker wattnya besar maupun kecil wattnya kecil kuat suaranya

faziefazie (author)  3dw4rd3 months ago
Okee sama2. oiya saya bukan gan, sist mungkin ya... hehehehe
faziefazie (author)  3dw4rd3 months ago
are you using my schematic? Yeah, sometimes speaker can be a trouble. I tested a few speakers 8 Ohm of mine, but only one speaker can produce a good sound. So it can be from quality of speaker it self.
3dw4rd faziefazie3 months ago

gimana caranya ngilangin noisnya

faziefazie (author)  3dw4rd3 months ago

noise bisa jadi karena komponen nya diganti, sirkuit ini udah ada perhitungannya jadi kalau diganti kapasitornya, kamungkinan noise terjadi karena komponennya saling mengganggu satu sama lain, makanya terjadi noise.

3dw4rd faziefazie3 months ago

amplifiernya kuat barusan saya coba dengan speaker 8ohm 81 watt suaranya kencang tapi icnya agak panas

faziefazie (author)  3dw4rd3 months ago

hati2 kalo IC nya panas, liat lagi ampere catu daya nya.

3dw4rd made it! faziefazie3 months ago

this is mine

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faziefazie (author)  3dw4rd3 months ago

hati2 kalo IC nya panas, liat lagi ampere catu daya nya.

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