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12 Simple IC 4093 Circuits and Projects Explained

Last Updated on September 18, 2022 by Swagatam 4 Comments

The 4093 is a 14-pin package containing four positive-logic, 2-input NAND Schmitt trigger gates as shown in the following figure. It is possible to operate the four NAND gates separately […]

Filed Under: Mini Projects

Blinking LED Circuit using LDR and Resistors

Last Updated on September 10, 2022 by Swagatam 2 Comments

This is perhaps the most simplest looking LED flasher that does not depend on any semiconductor. This LED blinker circuit utilizes ordinary passive components like a few resistors, a capacitor […]



Filed Under: LED and Light Effect, Mini Projects, Oscillator Circuits, Simple Circuits

Whistle Activated Switch Circuit

Last Updated on September 8, 2022 by Swagatam Leave a Comment

In this post we will learn how to build a simple whistle sound operated relay circuit, which can be used for switching ON/OFF a 220 V load through whistle sounds. […]

Filed Under: Fun Projects, Mini Projects, Remote Control

Simple Electronic Dog Whistle Circuit Explained

Last Updated on August 17, 2022 by Swagatam 2 Comments

An electronic dog whistle is a device that generates ultrasonic sound waves and is used for training dogs and for controlling excessive barking habit. Because dogs and domestic cats can […]

Filed Under: Mini Projects, Ultrasonic Projects

Op Amp Basic Circuits and Parameters Explained

Last Updated on September 22, 2022 by Swagatam 12 Comments

In the following article we discuss the main op amp parameters and the related op amp basic application circuits with equations, for solving their specific component values. Op-amps (operational amplifiers) […]

Filed Under: Electronics Tutorial, Mini Projects

Temperature Controlled Relay Switch Circuit

Last Updated on May 12, 2022 by Swagatam 74 Comments

In this article we discuss a simple temperature controlled relay circuit which can be switched ON/OFF depending on the temperature on its temperature sensor. Meaning, when the temperature on its […]

Filed Under: Heater Controllers, Mini Projects

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