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Newly Updated Circuit Projects:

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

How to Make a 3 Phase VFD Circuit

Last Updated on March 17, 2026 by Swagatam 348 Comments

pwmvoltageregulator

The presented 3 phase VFD circuit (designed by me) can be used for controlling the speed of any three phase brushed AC motor or even a brushless AC motor. The idea was requested by Mr. Tom Using the VFD The proposed 3-phase VFD circuit can be universally applied for most 3-phase AC motors where the […]

Filed Under: Grid and 3-Phase, Motor Controller Tagged With: Phase, VFD

12V DC to 220V DC Boost Converter Circuit

Last Updated on March 17, 2026 by Swagatam 124 Comments

In this article I have explained a very simple method of acquiring 220V DC from a 12V DC source. The idea utilizes inductor/oscillator based boost topology with the help of the IC 555. Circuit Operation Now let us learn more about this simple 12V to 220V DC boost converter circuit, which is built around IC […]

Filed Under: Power Supply Circuits Tagged With: 12V, 220V, Boost, Converter, DC

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

IC LM393 Complete Datasheet with Circuit Diagram

Last Updated on March 15, 2026 by Swagatam 5 Comments

Here we are going to discuss about LM393 that is a very popular dual voltage comparator IC. I will try to explain everything step by step so you can understand. We will see the ratings, the pinout, the electrical values, the formulas and also the way we can use it in real life circuits. General […]

Filed Under: Datasheets and Components Tagged With: Complete, Datasheet, LM393

Motorcycle Voltage Regulator Circuits

Last Updated on March 13, 2026 by Swagatam 226 Comments

mosfetregulatorcircuit3phase

In the article below I have explained a compilation of simple yet accurate motorcycle voltage regulator circuits, which can be used for regulating the varying alternator voltage into a fixed DC voltage. Voltage regulator circuit is very important in motorcycles and two wheelers since they ensure a regulated battery charging thus keeping the battery safe […]

Filed Under: Automobile Electronics Tagged With: Circuits, Motorcycle, Regulator, Voltage

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