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Tunnel Diode – Working and Application Circuit

A tunnel diode is a type of semiconductor diode which features a negative resistance on account of a quantum mechanical effect known as tunneling. In this post we will learn […] The post Tunnel Diode –...

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Triacs – Working and Application Circuits

A triac can be compared to a latching relay. It will instantly switch ON and close as soon as it's triggered, and will remain closed as long as the supply […] The post Triacs – Working and Application...

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LDR Circuits and Working Principle

As the name suggests LDRs or Light Dependent Resistors are resistors that exhibit a wide range of resistance values depending on the intensity of light incident on its surface. The […] The post LDR...

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Optocouplers – Working, Characteristics, Interfacing, Application Circuits

OPTOCOUPLERS OR OPTOISOLATORS are devices that enable efficient transmission of DC signal and other data across two circuit stages, and also simultaneously maintain an excellent level of electrical...

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Ice Warning Circuit for Automobiles

Devices that react to variations in atmosphere or fluid heat are simple to construct due to the easy availability of thermistors. This car ice warning circuit explains how to implement […] The post Ice...

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Photodiode, Phototransistor – Working and Application Circuits

Photodiodes and phototransistors are semiconductor devices which have their p-n semiconductor junction exposed to light through a transparent cover, so that external light can react and force an...

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Laughter Sound Simulator Circuit

As the name suggests, this device generates electronic sound, resembling human laughter. BASIC DESIGN To enable the circuit start the proposed operations, it must have a fundamental sound input or […]...

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Interesting Timer Circuits using IC 555 Explored

The circuits explained here are small timer circuits using the versatile chip IC 555, which generates predetermined time intervals in response to momentary input triggers. The time intervals can be […]...

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IC 555 Oscillator, Alarm and Siren Circuits

In this post we will learn how to build and optimize basic IC 555 oscillator circuits, whose waveforms can be further enhanced for generating complex sound effects such as warble […] The post IC 555...

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Red LED LightStim Circuit for Removing Facial Wrinkles

An LED based LightStim is a device used for rejuvenating facial skin by stimulating cell growth. Normally, RED LED is used in these devices since red light have been found […] The post Red LED...

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Simple Circuits using IC 7400 NAND Gates

In this article we will discuss many assorted circuit ideas built using NAND gates from ICs such as IC 7400, IC 7413, IC 4011, and IC 4093 etc. IC 7400, […] The post Simple Circuits using IC 7400 NAND...

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Easy Two Transistor Projects for School Students

A variety of small school projects can be built using just a couple of transistors. This ebook includes a collection of practical and fascinating circuit ideas using just a few […] The post Easy Two...

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Ultrasonic Pest Repellent Circuit

The explained Ultrasonic Pest repeller is a device that generates ultrasound or a very high frequency noise in the range of over 20 kHz which becomes useful for repelling or […] The post Ultrasonic...

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Simple Voltage Regulator Circuits using Transistor and Zener Diode

Power supply circuits which are designed to produce a stabilized, constant voltage and current output are called regulated power supply circuits. These circuits can be in the form of of […] The post...

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IC 723 Voltage Regulator – Working, Application Circuit

The IC 723 is a general purpose, extremely versatile voltage regulator IC, which can be used for making various types of regulated power supplies such as: Positive Voltage Regulator Negative […] The...

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3 Terminal Fixed Voltage Regulators – Working and Application Circuits

The popular 3 terminal fixed regulators available today are in the form of IC 7805, IC 7809, IC 7812, IC 7815, and IC 7824, which correspond to fixed voltage outputs […] The post 3 Terminal Fixed...

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500 Watt Inverter Circuit with Battery Charger

In this post we will comprehensively discuss how to build a 500 watt inverter circuit with an integrated automatic battery charger stage. Further in the article we will also learn […] The post 500 Watt...

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How to Make PCB at Home

For any electronic enthusiast making PCBs for an electronic project can be a lot of fun. A printed circuit board or PCB not only helps to build compact circuit projects, […] The post How to Make PCB at...

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Calculating Transistor as a Switch

Although transistors (BJTs) are popularly used for making amplifier circuits, these can be also effectively used for switching applications. A transistor switch is a circuit in which the collector of...

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Zener Diode Circuits, Characteristics, Calculations

Zener diodes - named after its inventor Dr. Carl Zener are fundamentally used in electronic circuits for generating precise voltage references. These are devices that are able to create a […] The post...

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