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Monday, July 27, 2020

How to make a simple Amplifier using LM386 with volume control

In this post, I will show you how to make a very simple amplifier using LM386 with Volume control.

If you prefer video mode or like to watch the working of the project please click here to watch it on YouTube

Parts List
  • LM386
  • 37 Ohm Resistor
  • 220uF/25V Electrolytic Capacitor
  • 0.1uF Ceramic Capacitor
  • 10k Trimmer or Potentiometer or Logarithmic Potentiometer
Theory

    In this project, the main component is LM386 which is a low voltage power amplifier that can operate with a wide supply voltage range between 4 to 12 volts and LM386 can also have a voltage gain of about 200.

The RV1 (Trimmer or Potentiometer or Logarithmic Potentiometer) can be used to control the volume.

Circuit Diagram

    The voltage gain of the below circuit diagram is about 20 


Alternate Circuit Diagram - The voltage gain of the below circuit diagram is about 200
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