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Newly Updated Circuit Projects:

How to Make HHO Fuel Cell Circuit in Automobiles for better Fuel Efficiency

Last Updated on June 30, 2026 by Swagatam 177 Comments

HHO2Bgas2Bin2Bmotorcycle

In this post we’ll try to investigate the making of HHO gas in automobiles for enhancing their mileage by approximately 50% or more, that means a reduction of petrol or diesel consumption by the same amount. In the previous post I tried to put forth an innovative design of a high voltage low current generator […]

Filed Under: Automobile Electronics, Energy from Magnets and Earth Tagged With: Automobiles, better, Cell, Efficiency, Fuel, HHO

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

Last Updated on June 28, 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

Monitoring 220V AC Load Current using Current Transformer [Circuit Diagram]

Last Updated on June 25, 2026 by Swagatam 36 Comments

current sensing transformer

In this post I have explained a circuit which can be used for monitoring or controlling AC 220V load current by sensing the load current through a contactless current transformer. Figure 1 below depicts a circuit diagram designed for a non contact load current sensing through a current transformer, which seemed to work well. It is […]

Filed Under: Security and Alarm Tagged With: 220V, AC, Current, Load, Monitoring, Transformer

How to Build Maxwell Inductance-Capacitance Bridge for measuring High Value Inductors

Last Updated on June 24, 2026 by Swagatam Leave a Comment

For measuring high inductance like 100H, the bridge we use is: James Clerk Maxwell Bridge which people also call Maxwell Inductance-Capacitance Bridge. It is made for medium to high Q inductors but when the inductance is large then it still behaves nicely, so people mostly prefer this one. Audio/Video Representation Basic Concept Basic idea of […]

Filed Under: Meters and Testers Tagged With: Bridge, Build, Capacitance, Inductance, Maxwell, Measuring

SMPS Flyback Boost Converter Calculator

Last Updated on June 24, 2026 by Swagatam 4 Comments

This calculator tool supports a Boost Converter Flyback setup which means now the code considers: Corrected turns ratio and primary voltage logic since the flyback works by storing energy during “ON” time and transferring to secondary during “OFF” time. Flyback boost topology where output voltage is higher than input. An accurate duty cycle formula for […]

Filed Under: SMPS and Converters Tagged With: Boost, Calculator, Converter, Flyback, SMPS

Build Simple Transistor Circuits

Last Updated on June 23, 2026 by Swagatam 73 Comments

variable power supply transistor

A compilation of important assorted transistor simple circuits to build has been included here. Simple Transistor Circuits for New Hobbyists Many simple transistor configurations like, rain alarm, delay timer, set reset latch, crystal tester, light sensitive switch and many more have been discussed in this article. In this compilation of simple transistor circuits (schematics) you […]

Filed Under: Mini Projects Tagged With: Build, Circuits, Simple, Transistor

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