High Fidelity audio amplifier

Published Sep 20, 2022

3 hours to build

Beginner

I have made an Audio Amplifier with good efficiency as per the need of today's requirement which is immune towards noise and interference.

Components Used
LM386 Audio Amplifier Audio Amplifiers LOW VLTG AUDIO PWR AMP	X 1
Resistor 1.2 kOhms Metal Film Resistors - Through Hole 1.2K OHM 1/4W 1%	X 1
Capacitor 10 µF Aluminium Electrolytic Capacitors - Radial Leaded 100V 10uF 85C 2k Hour Radial	X 1
Capacitor 10000 pF Multilayer Ceramic Capacitors MLCC - Leaded 250V 0.01uF C0G 5%	X 1
Capacitor 220 µF Aluminium Electrolytic Capacitors - Snap In 450V 220uF 20% 18k Hours	X 1
Capacitor 47nF Multilayer Ceramic Capacitors MLCC - Leaded 47000pF 100volt 10%	X 1
Resistor 10 Ohms Metal Film Resistors - Through Hole 10 OHM 1/4W 1%	X 1
LM2596 Adjustable Buck Converter Power Management IC Development Tools LM2596ADJ TO220 BUCK DB	X 1
Speaker Speakers & Transducers 28 mm, Round Frame, 0.25 W, 32 Ohm, Neodymium Magnet, PET Cone, Speaker	X 1
Potentiometer 10Kohms Potentiometers 10Kohms 10% 12.5mm Cermet Element	X 1

Description

Video

In this project, it is shown that how to build LM386 Audio Amplifier Circuit. It is a very low cost audio amplifier and can power any speaker. For the cost and size of the circuit, the sound from the LM386 Audio Amplifier can be loud.
There are many Audio Amplifier Circuits designed using LM386 IC. The main problem with these circuits is noise and interference. The noise from the Amplifier circuit designed in this project is considerably less and if designed on a proper circuit board, this will make a great Audio Amplifier.
The Audio Amplifier using LM386 is a low power circuit that can deliver a maximum power of 1 Watt (1W) and can be used in a wide range of applications like portable speakers, laptop speakers, etc.

we can make this project within few steps:-

First we will take a PCB.
Now we will draw a circuit diagram on PCB
Now we will shoulder the components as per the circuit diagram.
Now some speakers, switch, USB port for power supply will be connected to operate it.
Now as per our wish we will enclose it into any box so as to looking good.
Finally we have made our High Fidelity Audio Amplifier.

• The Audio amplifier can be built with LM386 IC, capacitors like 200 µF, 0.05 µF, 10µF, 0.01 µF for clearing of noise and unwanted DC signals.

Resistors and potentiometer

LM386 is already one of the important IC in audio department and is featured commonly portable speakers and laptop speakers.
The LM386 Audio Amplifier Circuit can be used for recording voice from microphone, building small speakers that are battery operated, in FM Radio Devices, etc.
They can also be used in TV Sound Systems, Line Drivers, Servo Drivers, Ultrasonic Drivers, etc.