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Newly Updated Circuit Projects:

Isolated High Side Gate Driver Opto-Coupler HCPL3120: No need of Bootstrapping Capacitor/Diode

Last Updated on May 18, 2026 by Swagatam 3 Comments

In this article I will be talking about this device that we call HCPL3120 or also J312, and we see that it is an isolated gate drive opto coupler which we can use for driving H-bridge MOSFET and IGBT gates safely from the low voltage logic side to the high voltage power side. It has […]

Filed Under: Datasheets and Components Tagged With: Driver, Gate, High, Isolated, Opto, Side

How to Sense Current Using Op-Amp: Low Side and High Side Circuits Explained

Last Updated on November 18, 2025 by Swagatam 6 Comments

In this post we are going to learn one very interesting and also very much useful topic that is how we can measure the current which is going through any load by just using some normal resistors and one op amp circuit. We know already that current is one very important thing in every electrical […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Current, Explained, High, Sense, Side

Build this Unidirectional Wind Turbine: Wells Turbine

Last Updated on June 30, 2026 by Swagatam 4 Comments

In this article I will explain you the full step by step building guide for making one Wells turbine at home, which is intended specially for homemade sea wave electricity system using oscillating air column. What is Wells Turbine So first we must understand that wells turbine is a special type of turbine in which […]

Filed Under: Energy from Magnets and Earth Tagged With: Build, Turbine, Unidirectional, Wells, Wind

How to Create Air Gap in a Ferrite Core Transformer

Last Updated on June 9, 2026 by Swagatam 5 Comments

In this article we are going to understand in detail how we can create air gap in a ferrite core based transformer which we are using in smps circuits like flyback or boost or forward type. Introduction We must understand that ferrite cores have very high permeability and they saturate very fast if we do […]

Filed Under: SMPS and Converters Tagged With: Core, Create, Ferrite, Transformer

THE HIGGINS ENGINE: Generating Electricity from Gravity

Last Updated on June 30, 2026 by Swagatam 3 Comments

Before we go ahead with the full concept and working of the Higgins Engine, I want to tell all our readers something very important. Recently I got a very kind and generous email from one of our respected readers Mr. Higgins. I am thankful and honored to receive such an in-depth and original contribution from […]

Filed Under: Energy from Magnets and Earth Tagged With: Clean, Energy, Engine, Generation, HIGGINS, Technology

Smart Buck-Boost MPPT Solar Charger Circuit for 12V 24V Battery

Last Updated on May 17, 2026 by Swagatam 2 Comments

In this post we are going to learn how we can make one real working smart solar battery charger circuit which can do MPPT charging. We are using Arduino Nano as the brain for controlling everything. We will also use INA219 sensor module so that we can read the solar voltage and current properly. And […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Boost, Buck, Charger, MPPT, Smart, Solar

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