How to Make a Simple Audio Amplifier

Hello friends, In this tutorial, we are going to build a great sounding audio amplifier with the LM386 Low Voltage Audio Power Amplifier. Their are different audio amplifier circuits with the LM386 but most of them had way too much noise, popping, and other interference. Finally I found one that the sounds great, so I am going to show you how to build it.

Download the circuit and construct it on a zero PCB. This amplifier output reduces the maximum noise in the audio

Supplies:

I strongly suggest you to buy the components from UTSource.net. because in my experience, the quality of the products are good. and also ON TIME Delivery. If you need quality PCB, they will afford at low cost from double side to multilayer. No minimum requirement.

Materials required

1) LM386

2)1000uf

3)0.1uf

4)10k variable resistor ( use volume control)

5)10E resistor

6) Stereo pin

7)8 ohms speaker

8) +9v battery and battery cap

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Step 1: Gather the Required Components

LM386:-

The LM386 is an amplifier chip. Only a couple resistors and capacitors are needed to make a working the audio amplifier. The chip has options for gain control and bass boost, and it can also be turned into an oscillator capable of outputting sine waves or square waves.

I recommend you to test on the bread board before you made it on the zero pcb

Step 2: Circuit Diagram of the Audio Amplifier

This is the circuit diagram of the audio amplifier. this circuit will reduce the maximum amount of noise on the audio signal and gives better output when compared to the other LM386 Circuits

Step 3: Connect the LM386 on the Breadboard

Place the IC on the breadboard and connect the vcc and ground pins to the bottom row as shown in the picture.

I used volume control 10K variable resistor to increase and decrease volume of the input audio signal.

connect the 0.1uf to the 5th pin of the LM386 IC followed with 10E resistor to the ground

Step 4: Use 1000uf to Reduce Noise

connect the positive lead of the capacitor to the 5th pin of the LM386 IC. the negative lead of the capacitor is directly connected to the speaker.

Step 5: Connect the Variable Terminal of the Resistor As Input

connect the variable output terminal of the resistor (volume control) to the 3rd pin of the IC. another two terminals to the audio input and ground

Step 6: Connect the Speaker and Input the +9v to the VCC and Ground

Connect the speaker as per the circuit diagram. through this article, i can't able to show the demo of the audio amplifier. but i can assure you that this amplifier can reduce maximum amount of noise and gives the better output.

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    Discussions

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    Gadisha

    Question 11 days ago

    Interesting, I just removed a set of speakers from an old TV, which I plan to use for my phone.
    Do you think I could use the speakers with this circuit?
    Sorry, I'm trying to learn about electronics but I'm still just a noob lol ;)