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New Circuit Projects

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

Last Updated on November 6, 2023 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

AC 220V/120V Mains Surge Protector Circuits

Last Updated on November 10, 2024 by Swagatam 174 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

Simple Peltier Refrigerator Circuit

Last Updated on November 10, 2024 by Swagatam 11 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

How to Calculate Transformerless Power Supply Circuits

Last Updated on March 9, 2025 by Swagatam 97 Comments

In this article I have explained how to calculate resistor and capacitor values in transformerless power supply circuits using simple formulas like ohms law. Analyzing a Capactive Power Supply Before I have explained the formula for calculating and optimizing resistor and capacitor values in a transformerless power supply, it would be important to first summarize […]

Filed Under: Power Supply Circuits Tagged With: Calculate, Circuits, Power, Supply, Transformerless

Single Transistor LED Flasher Circuit

Last Updated on March 9, 2025 by Swagatam 145 Comments

OneTransistorLEDFlasherCircuitDiagram2CImage

It is possibly the smallest LED flasher to date, which is able to flash an LED ON/OFF infinitely using a single transistor, a resistor, and a capacitor. Can you imagine making a great looking LED flasher or blinker with just a single transistor and a couple of other passive parts? That’s exactly what I have […]

Filed Under: Mini Projects Tagged With: Flasher, LED, Single, Transistor

Automatic Voltage Stabilizer Circuit for TV sets and Refrigerator

Last Updated on November 8, 2024 by Swagatam 122 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

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