Portable Guitar Amplifier - DIY

8,296

49

22

Introduction: Portable Guitar Amplifier - DIY

About: Sam Technology Professional is an independent educational organization teaching, developing & Inventing Electronics Projects. More at: http://samtechpro.blogspot.com & http://youtube.com/samtechpro

Welcome To "Sam Technology Professionals"
Hi Guys..!!
This is a portable guitar amplifier with some exclusive function. It gives you clean sound, bright & loud sound and distortion guitar sound. Even if you connect a semi acoustic guitar it will work as it do. It is good for high impedance pickups and microphones as well.
________________________________________

Details :

It is based on two IC "LM386" and some capacitors and resistors. It works fine. Its is easy to build and you can do it easily within 30mins.
________________________________________
Components Required:
1 - Resistor 10 Ohm
2 - Capacitor    0.047uf  [Code = 473J or 473k]
1 - Capacitor    100uf     [ Voltage = 25v or 50v] 
2 - Capacitor    10uf
1 - Capacitor    220uf     [Voltage = 16v or 25v]
2 - IC LM386                   [Its a Low Voltage OP Amp]
1 - Small Speaker
1 - Potentiometer 10K Ohm   [Linear or Audio But i will prefer audio first]
1 - LED (use it in series with a 100 Ohm resistor)
1 - DC Power Jack [Or you can use a 9v battery clip if you want to fit the battery in it.]

Beside these components a piece of pref-board and box to fit the circuit in are also required.lol
________________________________________


If you have any question then ask me in comments. I promise to reply your every comment.
Build it now..!! Have a wonderful Day..!!

Be the First to Share

    Recommendations

    • The 1000th Contest

      The 1000th Contest
    • Battery Powered Contest

      Battery Powered Contest
    • Hand Tools Only Challenge

      Hand Tools Only Challenge

    22 Discussions

    0
    johney
    johney

    Question 1 year ago on Introduction

    Hi team do you have a portable amp circuit for a more powerfull guitar amp like the roland cube, thanks, j page

    0
    RuwanthaW
    RuwanthaW

    Question 1 year ago on Introduction

    Hi, I have make it & Sound is not coming. pls check attached images also. help to correct it if any wrong something.. Thanks.

    20181110_065258.jpg20181110_065324.jpg20181110_065408.jpg
    0
    samtechpro
    samtechpro

    Reply 1 year ago

    you probably made wrong connections. Try rebuilding it.

    I've made the circuit but there a distortion in the speakers, I can't seem to get rid of. How do I correct it. I'm using a 2.5W, 8Ohms speaker

    0
    samtechpro
    samtechpro

    Reply 5 years ago

    distorted sound sometimes comes because of the gain cap that is 10uf between pin1 and 8 of ic386. try adding a 10k resistance in series with 10u caps for both ic. this will reduce the boosted gain. now replace the cap which is between positive rail and gnd with 330 or 470uf caps at 16v. you'll observe the noise is gone. A perfect IC original comes from Japan that doesn't have these issues. but at least you almost fixed the ordinary ic;)

    0
    Darronm1973
    Darronm1973

    Reply 3 years ago

    I'm interested in building this but I'm curious how to get the most distortion out of the circuit ? I built some night fire mini amps before and they don't have enough gain that I'm trying to achieve. Can you help me figure this out ? Also to get the volts up to 12 without a power supply can I simply wire a 9volt into two AA batteries in series ?

    0
    samtechpro
    samtechpro

    Reply 3 years ago

    I have a better idea to have more ouput power so we can drive larger speaker of about 2.5inches also the schematic is so simple that any one would feel relaxed to build that. I'll share it within two days on my instructables.

    And no you should not use AA batteries with 9v supply in order to have 12v. The above circuit and most of the op-amps circuit starts working on 5v. So i think 9v is ok for that you don't need to have 12v special supply. But i would suggest you to keep every suppy because you're gonna need them to test your equipments or you can build your own variable power supply. Have a good day (Y)

    0
    samtechpro
    samtechpro

    5 years ago

    A drawing mistake ha s been corrected. You can now build it.

    0
    samtechpro
    samtechpro

    Reply 5 years ago

    you need to use a 220v to 9v powersupply or dc adapter

    0
    samtechpro
    samtechpro

    Reply 5 years ago

    another method to power it is to use a battery of 9v that is cheap and of low noise

    0
    Guii
    Guii

    6 years ago on Introduction

    Why did you connect the output terminal of the left op-amp to the ground?

    0
    samtechpro
    samtechpro

    Reply 5 years ago

    that is wrong. the picture contain mistake. i will correct it soon

    0
    samtechpro
    samtechpro

    Reply 6 years ago on Introduction

    There is a long note about it on LM386 datasheet. This
    is called its bridge mode and it makes the power of output double. Also In this way very low signals of input are easily amplified.

    0
    samtechpro
    samtechpro

    5 years ago

    you're right.. i have never noticed what i have done while making.that image in paint. because of some confusions i think. but i will change it. the design of beavis audio doesnt work and if work it has a lot of noise.

    0
    RezLar
    RezLar

    6 years ago on Introduction

    If I wanted to add a standard headphone jack so I could plug my phone in would this be hard to do? Also would your design allow for multiple media inputs at once (e.g. phone and guitar)?

    Thanks!

    0
    samtechpro
    samtechpro

    Reply 6 years ago on Introduction

    You can do it easily. Because there is a very less distortion in the output signals as compared to the normal amp circuits based on lm386. Its sound always have distortion. Well you can easily add a headphone jack. You need to add a little circuit at the output like this one:

    http://samtechpro.blogspot.com/2014/03/how-to-use-...

    This is the link of my website. It will go directly to the schematic required for your headphone jack. Feel free to go. There are several interesting projects related to audio/musical equipments etc.

    0
    RezLar
    RezLar

    Reply 5 years ago on Introduction

    I just realized I had not replied to this. Thanks for your help! My project turned out pretty well!

    0
    samtechpro
    samtechpro

    Reply 6 years ago on Introduction

    If you want to just use it as an amplifier to play mp3 from your cell phone then you can just add a headphone jack at the input without changing the circuit