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Archives for 2025

Simple 220V RGB LED Bulb Circuit for Christmas, Diwali Decoration

Last Updated on February 7, 2026 by Swagatam 2 Comments

In this post I will explain this 220V RGB slow fading LED bulb circuit step by step and we can start from the left side and slowly move toward the right side so that you can understand what each block is doing. We use many parts like 555, 4017, 33uF, D1 to D4, and others […]

Filed Under: Lamps and Lights Tagged With: 220V, Bulb, Christmas, LED, RGB, Simple

A4988 Motor Driver Circuit Diagram with IC 555

Last Updated on February 7, 2026 by Swagatam 2 Comments

In this article we now talk about a very simple but very useful stepper motor controller that uses one A4988 driver module and one 555 astable pulse generator. Overview Of The Circuit So we first see the main building blocks. We have one A4988 module that drives any small 2 phase stepper motor. We also […]

Filed Under: Motor Controller Tagged With: 555, A4988, Driver, Motor

THE HIGGINS ENGINE: Generating Electricity from Gravity

Last Updated on January 21, 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: Renewable Energy Tagged With: Clean, Energy, Engine, Generation, HIGGINS, Technology

Build this Unidirectional Wind Turbine: Wells Turbine

Last Updated on January 21, 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: Motor Controller, Renewable Energy Tagged With: Build, Turbine, Unidirectional, Wells, Wind

Pseudo-sinusoidal IC 4047 Inverter Circuit

Last Updated on December 22, 2025 by Swagatam Leave a Comment

4047 inverter oscillator circuit stage

From a continuous source, battery, or vehicle alternator, it is possible to produce a 50 Hz voltage/pseudo-sinusoidal waveform, using this simple IC 4047 inverter circuit. The design is capable of operating many low-power devices that require a voltage of 220 V AC, typically supplied by the AC mains grid distribution network. The power of this […]

Filed Under: Inverter Circuits Tagged With: 4047, Inverter, Pseudo, sinusoidal

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

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