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!

Step 1: Parts and tools

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)

- 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)
<p>hey bro, how can i make multiple output with this without compromising the sound? Im planning to add another 3.5 mm output for my headphone</p>
<p>hi great intbl.:)<br> can i use different value of capacitor,resistorand potentiometer.? plz help.??</p>
Hiii friend i have some problem in making the amplifier. Actually i had made it as per ur instruction but its not working .after i had the datasheet of the ic that u had said but they are not matching ..so plz can u help me out of this .i dont know what to do. Reply as soon as possible...thankyou..
<p>hello, sorry for my very late reply. I've been busy and hiatus from this web, so I rarely check the comments or messages.</p><p>May I know which component that not matching with the IC? can you listed your component to me?</p>
Great fun. was my first real project.
<p>Wow, that's awesome. Keep up the good work! :)</p>
<p>what is the volt value of the ceramic and electronic capacitor ant other component?<br>need help please...</p>
Made it and it worked...What should we do if we want to connect 2 speakers?? Should i coneect the 2nd speaker parallel to the 1st one??
You need another audio ic. I have seen this same ic used in other instructables and for a 2 speaker set up just build 2 of that sort of set up and just solder the left wire wire to one and the right to the other just be sure that the ground goes to each as well
<p>does 9ohm resister also work for the same circuit as well?</p>
<p>it is ok if i use a MIC as a input device?</p>
<p>hi how about if i put it in outlet,220volt? what should i do? without using adapter.,.,</p>
<p>i ask u some thing that - Pin 6 : connect to 9V (positive) | connect to positive lead of 100uF | what dose it mean reply me plz</p>
<p>i must made this amplifire thank u and reply me plz </p>
<p>can i put 2 8ohm speaker in this circuit will audio level come down</p>
<p>can you say how to do on PCB Board </p>
Hey there<br>Greetings from India ;-)<br><br><br>Actually I wanted to have some changes done <br>I was wondering if I could use 5v instead of 9v in the same circuit!?.<br><br>Also <br>Does the same circuit work for 4ohms 3watt speaker??<br><br>Thanks in advance. :)
<p>gan nama lain IC LM 386 itu apaan sih gan soal.a saya mau beli tapi ga' tau nama.a</p>
sebutan lainnya JRC386, tp terkenalnya LM 386. Dan biasanya kalo mau nyari bilangnya ya IC LM 386. <br>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.
gan saya minta intruksi yg bhs indo dong tp scra sederhana soal.x saya g' terlalu paham kelistrikan
<p>duh saya cewe, jngan manggil 'gan' hahaha...</p><p>instruksi yg mana? kalo diartiin dari awal maaf bgt saya gak ada waktu buat bikinnya, soalnya udah mulai sibuk kerja.</p>
nice instructable...lemme go do it
<p>That's great, let me know if you finished it :)</p>
Can u please guide me how can I use 8 ohms 3 watts 2 speaker. Way differences will have to make to amp..
<p>You can read this instructables, he just made with two speaker based on my instructables here. http://www.instructables.com/member/Kevin+Marshall/</p>
*wat difference will have to make to amp..
<p>how to recharge the battery when it in use</p>
<p>Are you using the rechargeable battery?</p><p>you can't recharge disposable battery, it could be explode.</p>
thankx.it is working.nice ckt diagram. very easy way.
<p>I'm glad to know it's working, good job :)</p>
<p>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</p>
<p>The TBA820M is a 8 pin DIP, you will have the ripple <br>control and frequency compensation pin to worry about. and you'd have to do some work on the circuit <br>design.</p><p>I'm sorry I can't help you with the design, because I never use it before :(</p>
<p>can i build the circuit without using Potensio 5K and Potensio 1K , what happen if i do not use it</p>
<p>if you didn't use it, then you can't control volume and gain from your speaker.</p>
<p>how much is the approx estimate of all the components</p>
<p>For me, it's only cost around $5. In Indonesia the components is quite cheap :)</p>
<p>hi...is it possible to change the power supply? instead of a 9v battery i want to use a 9volts AC to DC power supply...but first i need to know how many milliamphere that the speaker need... i hope you answer my question ^_^</p>
<p>Hey, really sorry for my late reply. I've been on hiatus for awhile from this website for some reason.</p><p>Nine-volt batteries produce 400 to 500 milliampere-hours at 8 milliamperes. So you can use 9 volts AC to DC with around 500 mA.</p>
<p>finally itz done n working all fine thx for the ckt buddy</p>
<p>wow that's great, I'm glad to know it's all working. Good job dude :)</p>
<p>can we use 4ohms 3w speaker</p>
<p>I never use 4 ohms 3 watt speaker, but I think you can try it using my circuit design. but please try it first on the breadboard.</p>
<p>I want to use my Two 6 watt, 4 ohm speakers can anyone guide me how to make a portable speaker system and amplifier</p>
<p>I think it's quite the same, you can build using my circuit, but please try it first on the breadboard.</p>
<p>can we use 4ohms 3w speaker</p>
<p>dude i ve made the circuit and its working bt the audio s to low i dont knw wht mistake i ve made ne suggestions mine is a sony speaker with 3.2 ohms n 2.5 wattshelp me plz</p>
<p>hi...is it possible to change the power supply? instead of a 9v battery i want to use a 9volts AC to DC power supply...but first i need to know how many milliamphere that the speaker need... i hope you answer my question ^_^</p>
<p>How can I connect an LED ? it would be great if you can show it on the breadboard :)</p>
<p>can someone help me about this experiment?</p><p>would it still work if i dont use LM 386 chip because i dont have one of those?</p><p>is there other chip that i can use other than this?</p>

About This Instructable


630 favorites


Bio: Bachelor of Wireless Telecommunication Engineering | Software QA - Junior Engineer at Oberthur Technologies | A Rhesus(+) | Aries | Photography | Computer Geek | Chiliphobia | Art&Design More »
More by faziefazie: Camera Surveillance Controller System Sky on the Wall (Mood Lighting-IR remote) How to Make Clayduino
Add instructable to: