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Newly Updated Circuit Projects:

Grid Mains to Generator Changeover Relay Circuit

Last Updated on May 21, 2026 by Swagatam 176 Comments

generator2Bmains2Bchangeover2Bcircuit

In this post I have explained a simple configuration which can be used as a automatic changeover circuit for switching AC grid mains to generator mains, during power failures or outages. The explained circuit will effectively switch the connected appliances to the generator mains during power failure however it won’t be able to switch start the generator automatically, […]

Filed Under: Grid and 3-Phase Tagged With: Changeover, Generator, Grid, Mains, Relay

Emergency Generator Circuit Power Distribution

Last Updated on May 21, 2026 by Swagatam 1 Comment

truthtable

In this post I have explained a twin generator network system to be used for two separate houses during power failure and through automatic changeover.The idea was suggested by Mr. Ahmad. The Circuit Idea and Objective Thank you for posting the new and useful circuits. I am one of interesting in your website. This work […]

Filed Under: Grid and 3-Phase Tagged With: Distribution, Emergency, Generator, Power

Arduino 3 Phase Inverter Circuit with Code

Last Updated on May 21, 2026 by Swagatam 169 Comments

driver

An Arduino three phase inverter is a circuit which produces a 3 phase AC output through a programmed Arduino based oscillator. In this post I have explained how to make a simple microprocessor Arduino based 3 phase inverter circuit which could be upgraded as per user preference for operating a given 3 phase load. We […]

Filed Under: Grid and 3-Phase, Inverter Circuits Tagged With: Arduino, Code, Inverter, Phase

Driving 3-Phase Motor on Single Phase Supply

Last Updated on May 21, 2026 by Swagatam 33 Comments

3phasemotordriverpwmstage

Driving a three phase motor on a single phase supply directly through ordinary methods can be difficult and dangerous. It requires accurately designed circuits for implementing the operations. Here I have tried to present one such PWM controlled three phase motor driver circuit. I have explained more. The circuit can be understood with the following […]

Filed Under: Grid and 3-Phase, Motor Controller Tagged With: Driving, Motor, Phase, Single, Supply

Petrol to LPG ATS Circuit using Solenoid Changeover Valve

Last Updated on May 21, 2026 by Swagatam 32 Comments

ATSsolenoid 1

In this post I have explained a simple mains to generator automatic transfer switch (ATS) which features an initial petrol start which switches to an LPG gas supply via fuel valve changeover switches. The idea was requested by Mr. Junaid. Technical Specifications sir i want to make my generator automatic start on petrol then shift […]

Filed Under: Grid and 3-Phase Tagged With: ATS, Changeover, LPG, Petrol, Solenoid, Valve

5 Simple Fastest Finger First Circuits Explained

Last Updated on May 21, 2026 by Swagatam 14 Comments

fastest finger first game

The 5 simple fastest finger first indicator circuits presented here can be used for indicating which candidate was the first to press the answer button out of the 4 participating candidates in a quiz contest. We all have probably seen the famous game show “who wants to be a millionaire” and many similar quiz shows, […]

Filed Under: Games and Sports Projects Tagged With: Circuits, Explained, Fastest, Finger, First, Simple

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