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Explained

7 Simple Continuity Tester Circuits Explained

Last Updated on March 24, 2026 by Swagatam 43 Comments

simplecontinuitytestercircuit

If you are looking for a simple circuit to test continuity of wires and long conductors, the explained 7 easy to build continuity circuits are the ones which you can try and might fulfill your requirement. What is a Continuity Tester A continuity tester is a device which is used for identifying the correct continuity […]

Filed Under: Meters and Testers Tagged With: Circuits, Continuity, Explained, Simple, Tester

SG3525 Inverter Circuits with Low Battery Cut-off and Overvoltage Regulation

Last Updated on March 16, 2026 by Swagatam 4 Comments

sg3525INVERTERCIRCUITWITHOVERLOADLOWBATTPROTECTIONCIRCUIT

In this post I have explained a 3 powerful yet simple 12V inverter circuits using a single IC SG 3525. The first circuit is equipped with a low battery detection and cut off feature, and an automatic output voltage regulation feature. You may also want to read how to design a sine wave inverter from […]

Filed Under: Inverter Circuits Tagged With: Explained, Inverter, SG3525, Simple, Sine, Wave

10 Useful Function Generator Circuit Diagrams Explained

Last Updated on February 27, 2026 by Swagatam 27 Comments

function generator circuit

In this post I have explained how to build 10 simple yet useful function generator circuits using IC 4049, IC 8038, IC 741, IC 7400, transistors, UJTs etc. for generating accurate square waves, triangle waves, and sinewaves through easy switch operations. 1) Using IC 4049 Using only one low-cost CMOS IC 4049 and a handful […]

Filed Under: Meters and Testers Tagged With: Diagrams, Explained, function, Generator, Useful

DPDT Relay Working, Pinouts, Testing Explained

Last Updated on February 7, 2026 by Swagatam 2 Comments

In this post we are going to understand about how this DPDT relay actually works, how we identify its pinouts, and how we can use it in our projects. We shall go step by step so that you can feel confident with every small thing about it. Introduction We know that a DPDT relay means […]

Filed Under: Electronics Theory Tagged With: DPDT, Explained, Pinouts, Relay, Testing, Working

10 Simple LED Chaser Circuit Diagrams Explained [Knight Rider, Scanner, Reverse-Forward, Cascaded]

Last Updated on January 16, 2026 by Swagatam 172 Comments

knight rider 2

In this article I have explained the construction of 10 interesting yet simple LED chaser circuits, which not only create beautiful running light effect but are also easy to build. We also discuss how to modify these into a design popularly known as “knight rider” chaser circuit. These primarily incorporate LEDs as well as mains […]

Filed Under: Lamps and Lights Tagged With: Chaser, Diagrams, Explained, Knight, LED, Simple

10 Simple FM Transmitter Circuit Diagrams Explained

Last Updated on January 2, 2026 by Swagatam 132 Comments

two transistor FM transmitter

An FM transmitter circuit is a high frequency wireless device which is able to transmit voice signals into atmosphere so that it can be received by a corresponding FM receiver circuit for reproducing the voice signals in a loudspeaker. Here we’ll discuss how to build small FM transmitter circuits using 10 different methods, one that […]

Filed Under: Wireless Circuits Tagged With: Diagrams, Explained, FM, Simple, Transmitter

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