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Newly Updated Circuit Projects:

100 Watt Amplifier Circuit Diagram using LM12 IC

Last Updated on May 15, 2026 by Swagatam 4 Comments

100 watt amplifier circuit using IC LM12

The LM12 integrated circuit (IC)-based 100-watt amplifier circuit is a strong audio amplification solution created to produce high-quality sound in a small package. This amplifier delivers outstanding power output while preserving a tiny footprint by using the capabilities of the LM12 IC. Because it is a monolithic circuit, the LM12 IC is an effective and […]

Filed Under: Audio and Amplifier Projects Tagged With: 100, Amplifier, LM12, Watt

How to Make an Outstanding Home Theater System

Last Updated on May 15, 2026 by Swagatam 101 Comments

home theater1 1

The article discussed here provides a simple, cheap home theater system circuit that may be built at home and used for the desired purpose. Introduction The results from this circuit design are outstandingly rich and have the capabilities comparable with the costly hi-end types available in the market. Home theater systems are quite common nowadays […]

Filed Under: Audio and Amplifier Projects Tagged With: Home, Outstanding, System, Theater

Make this Musical Greeting Card Circuit

Last Updated on May 15, 2026 by Swagatam 18 Comments

simplemusicalgreetingcardcircuit

The presented circuit of a musical greeting card circuit was requested by one of the keen readers of this blog, so I designed this interesting little circuit, which is simple and easily gets embedded inside any standard greeting card fold. Looking at the given circuit diagram, we see a design consisting of a very few number of components, rigged […]

Filed Under: Audio and Amplifier Projects Tagged With: Card, Greeting, Musical

Simple Intercom Circuit [2 way]

Last Updated on May 15, 2026 by Swagatam 12 Comments

national semiconductor

The article presented below describes a very simple intercom system which can be built and installed at any required place very cheaply. The circuit utilizes just a single IC and a very few other components for the entire assembly. How it Works If you are looking for a simple and low cost intercom system for home installation, […]

Filed Under: Audio and Amplifier Projects Tagged With: Intercom, Simple

Arduino Musical Tune Generator Circuit

Last Updated on May 15, 2026 by Swagatam 2 Comments

arduino2Bsiren

You can use this little Arduino musical tune generator circuit for a preferred application, such as for making an interesting door bell, as a car reverse horn, or music box for gifting somebody, or simply for personal amusement. Hardware Required The Hardware required for the project are given as follows: The Arduino is powered with […]

Filed Under: Arduino Projects, Audio and Amplifier Projects Tagged With: Arduino, Generator, Musical, Tune

Make this Radio Repeater Circuit at Home

Last Updated on May 15, 2026 by Swagatam 11 Comments

repeater 2

In this post I have explained a simple radio repeater circuit which can be built by any new hobbyist or a radio amateur for communicating over long distances using ordinary transmitters and radio receivers. In this article we are going to see what radio repeater is, how it works and how to build one in […]

Filed Under: Audio and Amplifier Projects Tagged With: Home, Radio, Repeater

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