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Newly Updated Circuit Projects:

1.5V to 12V DC Converter Circuit Diagram for LEDs

Last Updated on January 17, 2025 by Swagatam 31 Comments

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The post provides interesting information regarding the making of a 1.5V to 12V converter circuit using a couple of transistors and an inexpensive coil. The idea was requested by Mr. Keith. The Circuit Request I found your blog and have searched for an answer to my question but I’m just not finding it…. What I want to do […]

Filed Under: Power Supply Circuits Tagged With: 12V, Converter, DC, LEDs

10 Step Relay Selector Switch Circuit Diagram

Last Updated on June 23, 2026 by Swagatam 131 Comments

electronicselectorswitchcircuit

In this post I have explained a simple yet useful 10 step selector switch circuit which can be operated using a singe push-to-ON switch. In the following design the circuit is used as a 3 step, single push motor speed controller unit. The circuit was requested by Mr.Edalcor. Technical Specifications hi sir good day to to you, can you please design […]

Filed Under: Mini Projects Tagged With: Relay, Selector, Step, Switch

Homemade 100VA to 1000VA Grid-tie Inverter Circuit

Last Updated on December 19, 2024 by Swagatam 258 Comments

The following concept I have explained a simple yet viable solar grid tie inverter circuit which can be modified appropriately for generating wattage from 100 to 1000 VA and above. What’s a grid tie inverter It’s an inverter system designed to work just like an ordinary inverter using a DC input power with an exception […]

Filed Under: Inverter Circuits Tagged With: 1000VA, 100VA, Grid, Homemade, Inverter

Ultraviolet UV Water Filter/Purifier Circuit at Home

Last Updated on May 24, 2026 by Swagatam 14 Comments

UVwaterpurifiercircuitdevice

The post describes an easy method of making an ultra violet water purifier circuit using ordinary electronic components. How UV is Used as Germicidal Ultraviolet germicidal irradiation (UVGI) is a water treatment method which employs UV or ultraviolet light rays in the range of short wavelength in order to eliminate the present pathogens and microorganisms. The technology involves […]

Filed Under: Health related Projects Tagged With: Filter, Home, Purifier, Ultraviolet, UV, Water

Single Phase AC to Three Phase AC Converter Circuit

Last Updated on May 21, 2026 by Swagatam 24 Comments

singlephasetothreephaseconvertercircuit

In this post I have explained an interesting single phase AC to 3 phase AC circuit. The idea was requested by Mr. Sachin Sinalkar. Technical Specifications Hi dear sir, is there any way by which we can convert single phase 230V supply into three phase. i had try to ask question on your web site […]

Filed Under: Grid and 3-Phase Tagged With: AC, Converter, Phase, Single, Three

3v, 4.5v, 6v, 9v, 12v, 24v, Automatic Battery Charger Circuit with Indicator

Last Updated on May 17, 2026 by Swagatam 316 Comments

batterychargercircuit

An all-in-one automatic voltage battery charger circuit is discussed in the following post; the circuit can be modified in many different ways as per individual requirements and applications. The following circuit will allow you to charge any battery right from 1.5V to 24V simply by setting up a given preset. How it Works using LM3915 […]

Filed Under: Battery Charger Circuits Tagged With: 12V, 24v, Automatic, Battery, Charger, Indicator

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