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Newly Updated Circuit Projects:

Automatic Voltage Stabilizer Circuit for TV sets and Refrigerator

Last Updated on June 3, 2026 by Swagatam 128 Comments

wiring

Here we will study the design of a simple automatic mains AC voltage stabilizer which can be applied for safeguarding appliances like TV and refrigerators from fluctuating voltages. A voltage stabilizer is a device which is designed to sense inappropriate voltage fluctuations in AC mains supply inputs, and correct them to produce a stabilized voltage for the […]

Filed Under: Voltage Control and Protection Tagged With: Automatic, Refrigerator, sets, Stabilizer, TV, Voltage

Simple Peltier Refrigerator Circuit

Last Updated on June 3, 2026 by Swagatam 20 Comments

HowtoMakeaSimplePeltierRefrigerator

In this post I have explained a straightforward procedure for building a simple refrigerator using Peltier device for generating the required cooling effect inside the fridge. How Peltier Device Works We are all familiar with a Peltier device and know how it functions. A Peltier device is a 2-wire semiconductor device having two surfaces that […]

Filed Under: Temperature Controllers Tagged With: Peltier, Refrigerator, Simple

AC 220V/120V Mains Surge Protector Circuits

Last Updated on June 3, 2026 by Swagatam 177 Comments

Simple Mains AC Surge Protector Circuit Diagram2C Image

Voltage spikes  can sometimes be a big nuisance as far as the safety of the various electronic appliances are concerned. I have explained how to make a simple AC Mains surge protector circuits at home. What is a Surge Protector A surge protector is an electrical device which is designed to neutralize minor electrical spikes […]

Filed Under: Voltage Control and Protection Tagged With: 120V, 220V, AC, Mains, Protector, Surge

How to Configure a Solar Panel System – Living of the Grid

Last Updated on June 3, 2026 by Swagatam 5 Comments

GridTieInverter252CWiringDetails252CDiagram

In thi post I have explained how to connect and integrate readymade solar panel system with our home, without depending on technical personnel or experts. The main gadgets required for implementing this are: a solar panel, a solar controller, battery and an inverter Introduction It’s been there since the earth was born and it is […]

Filed Under: Solar Controller Circuits Tagged With: Configure, Grid, Living, Panel, Solar, System

How to Use LM317 for Making a Variable Power Supply Circuit

Last Updated on June 3, 2026 by Swagatam 171 Comments

IC 317 Power Supply2C Simplest

In this post I will elaborately explain how to build a simple LM317 based adjustable power supply circuit using minimum number of external components. As the name suggests a variable power supply circuit provides the user with a range of linearly varying output voltages through a manually controlled potentiometer rotation. A LM317 is a versatile […]

Filed Under: Power Supply Circuits Tagged With: LM317, Making, Power, Supply, Variable

Automatic Vehicle Headlight Dipper/Dimmer Circuit

Last Updated on June 3, 2026 by Swagatam 56 Comments

AutomaticAutomobileLightDipperCircuitDiagram252CImage

The circuit described here can be built and used in your vehicle for an automatic dipping and dimming operation of the vehicle headlamps, in response to the intense lights coming from an opposite vehicle headlamps. What’s a Dimmer/Dipper in Automobiles An automobile headlight dimmer/dipper is a circuit which automatically switches the headlight intensities of vehicles arriving from […]

Filed Under: Automobile Electronics Tagged With: Automatic, Dimmer, Dipper, Headlight, Vehicle

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