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Newly Updated Circuit Projects:

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

How to Understand and Use IC 4093 NAND Gates, PinOuts

Last Updated on June 23, 2026 by Swagatam 21 Comments

IC 4093 1

In this article I have explained how to use NAND Gates from the IV 4093 or any other similar IC consisting of NAND gates. About IC 4093 The IC 4093 may not have complicated specifications and attributes yet it proposes many useful utilities. It consists of some fundamental blocks which can be configured according to […]

Filed Under: Mini Projects Tagged With: 4093, Gates, NAND, Pinouts, Understand

Simple Hobby Circuit Projects

Last Updated on June 23, 2026 by Swagatam 201 Comments

40 Watt Fluorescent Lamp Inverter Circuit Diagram2C Image

A few of the interesting and useful hobby electronic circuit diagrams already published in this blog have been selected and compiled here for your quick reference and understanding. What is a Hobby Circuit? A hobby circuit is an electronic circuit project specially designed to suit new hobbyists. These circuits are mostly small and easy to […]

Filed Under: Mini Projects Tagged With: Hobby, Projects, Simple

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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