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Audio and Amplifier Projects

10 Useful Active Filter Circuit Diagrams Explored

Last Updated on January 17, 2025 by Swagatam 13 Comments

Figure1

In this post I will comprehensively discuss 10 different types of active filter circuits which can be used for filtering music and audio with the desired levels of bass and treble effects. We also learn about their working, types, characteristics, and practical applications circuits. Contributed By: Ken Madison In audio signal processing circuits, filters are used […]

Filed Under: Audio and Amplifier Projects Tagged With: Active, Diagrams, Explored, Filter, Useful

Robot Voice Generator Circuit

Last Updated on January 2, 2024 by Swagatam 15 Comments

robot voice generator circuit

A robot voice generator circuit is a device which modifies a normal human voice into a typical robot like voice, that we normally come across in movies, or video games. The working concept of the circuit is actually simple. The actual human voice signal is subjected to an external frequency modulation signal, such that the […]

Filed Under: Audio and Amplifier Projects Tagged With: Generator, Robot, Voice

Simple 10 Watt Amplifier Circuits using Transistors

Last Updated on September 13, 2023 by Swagatam 30 Comments

simplest 10 watt amplifier circuit

In this post I will comprehensively explain 3 easy to build 10 watt power amplifier circuits, which can be built using discrete parts, such as resistors, transistors, and MOSFETs. The MOSFETs used in these designs are the ordinary IRF540 and IRF9540, that are easily avail;able in the market and are quite inexpensive. True Complementary 10 […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Circuits, Simple, Transistors, Watt

Simple Tone Control Circuits

Last Updated on September 14, 2023 by Swagatam 10 Comments

passive tone control compressed

Tone control circuits are basically filter circuits which are used to filter audio frequency signals so that only the desired range of frequencies are allowed to pass to the amplifier and the loudspeakers. This enables the listener to customize the music output with either a high level of low frequency content through bass boost, or […]

Filed Under: Audio and Amplifier Projects Tagged With: Circuits, Control, Simple, Tone

60 Watt Amplifier Circuit

Last Updated on January 5, 2023 by Swagatam 20 Comments

60 watt amplifier circuit compressed

The circuit of a 60 watt power amplifier is shown in the below figure. It’s design layout is simple and very conventional. It has a completely symmetrical pattern which has one pole frequency compensation, yet some uncommon methods have been employed in order to keep the number of parts less. To start with, the configuration […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Watt

Public Address (PA) Amplifier Circuit

Last Updated on January 5, 2023 by Swagatam 4 Comments

public address PA circuit compressed

A public address system (PA system) is an electronic system that includes a set of audio electronic devices such as microphones, amplifiers, loudspeakers, and other similar audio equipment. It is designed to boost the volume of a human speech, or a musical source, or some other audible sound input to an amplified version through an […]

Filed Under: Audio and Amplifier Projects Tagged With: Address, Amplifier, PA, Public

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