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Newly Updated Circuit Projects:

Fiber Optic Circuit – Transmitter and Receiver

Last Updated on January 3, 2024 by Swagatam 13 Comments

optical fiber

Electronic signals have been quite successfully sent for decades through standard “hard -wire” connections, or by using radio links of different kinds which had many disadvantages. On the other hand fiber optic links, whether used for audio or video links over long ranges, or to handle small distances, have been offering some distinct advantages compared […]

Filed Under: Wireless Circuits Tagged With: Fiber, Optic, Receiver, Transmitter

Zener Diode Circuits, Characteristics, Calculations

Last Updated on May 20, 2026 by Swagatam 25 Comments

zener characteristics

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 practically constant voltage across them regardless of variations in circuit and voltage situations. Externally, you may find zener diodes a lot similar to standard diodes […]

Filed Under: Electronics Theory Tagged With: Calculations, Characteristics, Circuits, Diode, Zener

Calculating Transistor as a Switch

Last Updated on May 20, 2026 by Swagatam 15 Comments

inverting transistor

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 the transistor is switched ON/OFF with relatively larger current in response to a correspondingly switching low current ON/OFF signal at its base emitter. As an […]

Filed Under: Electronics Theory Tagged With: Calculating, Switch, Transistor

How to Make PCB at Home (Easiest Method)

Last Updated on May 20, 2026 by Swagatam 32 Comments

etching strategies

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, it also guarantees the working of the circuit fail proof and more accurate. In this post I will comprehensively explain a step wise process of […]

Filed Under: Electronics Theory Tagged With: Easiest, Home, Method, PCB

500 Watt Inverter Circuit with Battery Charger

Last Updated on August 3, 2020 by Swagatam 391 Comments

500 watt

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 how to upgrade the system for higher loads and how to enhance ot into a pure sine wave version. This 500 watt power inverter will […]

Filed Under: Inverter Circuits Tagged With: 500, Battery, Charger, Inverter, Watt

3 Terminal Fixed Voltage Regulators – Working and Application Circuits

Last Updated on January 2, 2024 by Swagatam 13 Comments

regulator 78XX

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 of 5 V, 9 V, 12 V, 15V, and 24 V. These are called fixed voltage regulators since these ICs are able to produce excellent […]

Filed Under: Power Supply Circuits Tagged With: Application, Fixed, Regulators, Terminal, Voltage, Working

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