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Newly Updated Circuit Projects:

Making a Thermoelectric Generator (TEG) Circuit

Last Updated on June 30, 2026 by Swagatam 15 Comments

TEG

A thermoelectric generator (TEG) is a kind of “radiant energy device” which has the property of converting temperature into electricity. In this post I have explained a little about this concept and find out how we can use it to generate electricity from heat and cold. What’s TEG In one of my earlier articles I […]

Filed Under: Energy from Magnets and Earth Tagged With: Generator, Making, TEG, Thermoelectric

Deep Soil Metal Detector Circuit – Ground Scanner

Last Updated on January 1, 2019 by Swagatam 17 Comments

fig1

In this post I have explained a simple deep under soil metal detector circuit for evaluating hidden metals such as gold, iron, tin, brass etc by detecting change in the resistance of the relevant soil layers. Bigger physical objects which might be buried within the topsoil could be unveiled through a modification in the electrical […]

Filed Under: Sensors and Detectors Tagged With: Deep, Detector, Ground, Metal, Scanner, Soil

Arduino IR Remote Control Circuit

Last Updated on May 14, 2026 by Swagatam 10 Comments

IRremote

In this post I will show how to construct a customizable Arduino based IR (infrared) based wireless remote control switch, which consists of IR remote and a receiver, you may modify according to your needs. In the later part of the article I have explained about an upgraded foolproof version of an IR remote control […]

Filed Under: Arduino Projects, Remote Control Circuits Tagged With: Arduino, Control, IR, Remote

Natural Mosquito Repellent Using High Watt Resistor

Last Updated on September 25, 2026 by Swagatam 4 Comments

As the name suggests, to build this simple natural mosquito repellent circuit you will just require a high watt resistor, a few drops of lemon eucalyptus oil and  mains supply input. Chemical Based Mosquito Repellent are Harmful for Health You might be already familiar with these popular ready made mosquito repellent units which come in […]

Filed Under: Pets and Pests Tagged With: High, Mosquito, Natural, Repellent, Resistor, Watt

Simple SG3525 Sine Wave Inverter Circuit Explained

Last Updated on December 27, 2025 by Swagatam 1,462 Comments

sg3525 sine wave inverter circuit

In this post we will discuss two methods of designing pure sine wave inverter circuits using 555 IC based SPWM processing. In the first concept we connect the 555 processors directly with the SG3525 outputs and do the sine wave conversion directly at the MOSFET gates. In the second concept we do it externally and […]

Filed Under: Inverter Circuits Tagged With: High, Power, Pure, SG3525, Sine, Wave

Arduino Digital Clock Using RTC Module

Last Updated on June 9, 2026 by Swagatam 5 Comments

P 20160813 150716

In this post I will show how to construct a digital clock using RTC or Real Time Clock module. We will understand what “RTC” module is, how to interface with Arduino and what it does. RTC module is a circuit, which keeps track of current time accurately. It does two functions, it communicates with microcontrollers […]

Filed Under: Arduino Projects Tagged With: Arduino, Clock, Digital, Module, RTC

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