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Newly Updated Circuit Projects:

Types of Power Amplifier Classes Explained in Simple Words

Last Updated on May 15, 2026 by Swagatam 6 Comments

class A amplifier

In this post I am going to explain power amplifiers and their classification according to their output electrical characters and application. We will be exploring amplifier classes: A, B, AB, C, D, E, F, G, H, I, S and T briefly and yes, that’s a lot of amplifier types that are available in today’s electrical […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Classes, Explained, Power, Simple, Types

Traffic Light Controller Circuit [Signal Red, Green, Amber]

Last Updated on May 16, 2026 by Swagatam 11 Comments

traffic light signal

A traffic light controller circuit can be used for controlling the sequential illumination of the RED, ORANGE and GREEN traffic signal lamps, by maintaining appropriate delays between the illumination sequence. In real traffic signal light system we all have seen how the red, orange and green lamps switch ON/OFF in sequence with specific amount of […]

Filed Under: Automobile Electronics Tagged With: Amber, Controller, Green, Light, Signal, Traffic

Make this Drag Race Timer Circuit

Last Updated on November 27, 2021 by Swagatam 8 Comments

block

In this post we are going to build a drag race timer circuit using a 7 segment display and commonly available discrete components which can measure the time taken for a car or any other vehicle from start line to finish line. The proposed circuit is fully automatic, meaning it can start and stop the […]

Filed Under: Timer and Delay Relay Tagged With: Drag, Race, Timer

FM Signal Booster Circuit with Adjustable Gain

Last Updated on May 15, 2026 by Swagatam 14 Comments

V shape antenna

Did you’ve ever had trouble catching or establishing connection with distant FM radio stations which were broadcasting programmes you wanted to listen to? Perhaps you’re aware there are a lot more faraway channels, further than the range of your FM receiver. Of course, you could purchase or construct a stronger FM tuner but, building a tunable FM […]

Filed Under: Audio and Amplifier Projects Tagged With: Adjustable, Booster, FM, Gain, Signal

Transistor Multivibrator Circuits [Astable, Bistable, Monostable]

Last Updated on September 22, 2026 by Swagatam 1 Comment

1

A transistor or BJT multivibrator is a two-stage switching circuit that is configured in a cross-coupled manner. This allows each of the active BJT stages to be regeneratively cross-coupled with the other BJT stage, so that one switches ON when the other switches OFF, and vice versa. This cross-coupling may be set up to switch either a […]

Filed Under: Oscillator Circuits Tagged With: Astable, Bistable, Circuits, Monostable, Multivibrator, Transistor

Build this Subwoofer Amplifier Circuit [Mini Ground-Shaker]

Last Updated on May 15, 2026 by Swagatam 17 Comments

subwoofer circuit mini ground shaker

A subwoofer amplifier is basically a power amplifier designed to filter and extract the low frequency content from the input audio signal and amplify it to the desired levels. This allows a sound reproduction that is enhanced with deeper bass, generating a concert hall like, or an immersive theater like sound effects. By: Sania D’souza […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Build, Ground, Mini, Shaker, Subwoofer

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