Editor Version ×
recommended

Pro Edition

free

Brand new interactions and interfaces

Smooth support for design sizes of over 3W

devices or 10W pads

More rigorous design constraints, more

standardized processes

For enterprises, more professional users

Std Edition

Easy to use and quick to get started

The process supports design scales of 300

devices or 1000 pads

Supports simple circuit simulation

For students, teachers, creators

Ongoing

STD An Audio Amplifier Using LM386 Op-Amp IC

An Audio Amplifier Using LM386 Op-Amp IC

Project tags

License

Public Domain

License: Public Domain

Mode:

Mode

Editors' pick

Editors' pick

  • 338
  • 0
  • 1
Update time: 2024-06-16 09:47:19
Creation time: 2024-06-15 07:46:46
Description

Description

Project Details:

The primary objective of this project is to design a audio amplifier circuit using the
LM386N Operational Amplifier (Op-Amp). This versatile and widely used IC is known for
its simplicity and effectiveness in audio applications.

 

  • Input Configuration: Two resistors are strategically employed. Each stereo channel
    is connected to one resistor, and the junction of these resistors serves as the mono
    input to the LM386N Op-Amp. This simple resistor network combines the left and
    right audio signals, resulting in a mono audio output.
  • Coupling Capacitors: To facilitate DC isolation and allow only the AC audio signal
    to pass through, 100 microfarad capacitors are coupled to pins 6 and 7 of the
    LM386N Op-Amp. These capacitors ensure that any DC bias in the input signal is
    blocked, preventing potential damage to the amplifier and improving overall
    performance.
  • Filtering Capacitors: In order to enhance audio signal quality and eliminate highfrequency distortion, two capacitors are strategically placed. A 1000 microfarad
    capacitor is positioned between the output of the LM386N Op-Amp and the speaker.
    This capacitor acts as a low-pass filter, attenuating high-frequency components and
    allowing only the audio signal to reach the speaker.
    Additionally, a 100-microfarad capacitor is connected from the output to the ground.
    This capacitor serves as a decoupling capacitor, filtering out any residual highfrequency noise or distortion before the signal is delivered to the load.
  • Overall Functionality: The LM386N Op-Amp, configured in a non-inverting
    amplifier mode, amplifies the mono audio signal, providing sufficient gain to drive the
    connected speaker. The combination of input resistors and coupling and filtering
    capacitors ensures that the amplified audio signal is mono, free from DC bias, and
    devoid of unwanted high-frequency artifacts.
    In summary, this project capitalizes on the LM386N Op-Amp's capabilities to create
    a simple yet effective stereo to mono audio amplifier, demonstrating the integration
    of resistors and capacitors to shape the input, enhance signal quality, and deliver a
    clean and amplified audio output.

 

Circuit Diagram and Simulation:

 

Design Drawing

Design Drawing

schematic diagram
1 /
PCB
1 /
The preview image was not generated, please save it again in the editor.
Project Attachments

Project Attachments

Order File name Download times
1

Simulation.mp4

2
2

Updated_EasyEDA_works.mp4

0
Project Members

Project Members

Target complaint
Related Projects
Change a batch
Loading...

Comment

Add to album ×

Loading...

reminder ×

Do you need to add this project to the album?

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn