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Electronics Theory

Learning Basics of Semiconductors

Last Updated on May 20, 2026 by Swagatam 2 Comments

In this post I will comprehensively explain regarding the fundamental working principles of semiconductor devices, and how the internal structure of semiconductors function under the influence of electricity. The resistivity value between these semiconductor materials neither has a complete conductor characteristic nor a complete insulator, it is in between these two limits. This feature may […]

Filed Under: Electronics Theory Tagged With: Basics, Learning, Semiconductors

Learning Basic Arduino Programming – Tutorial for the Newcomers

Last Updated on May 20, 2026 by Swagatam Leave a Comment

arduino led

In this tutorial I have explained how to do basic Arduino programming through example codes and sample programs. This tutorial can be an extremely valuable course for all the newcomers who wish to grasp the basics through easy, understandable language. Introduction According to wikipedia a microcontroller is equivalent to a mini computer built inside a […]

Filed Under: Arduino Projects, Electronics Theory Tagged With: Arduino, Basic, Learning, Newcomers, Programming, Tutorial

How a Relay Works – How to Connect N/O, N/C Pins

Last Updated on May 20, 2026 by Swagatam 82 Comments

how to connect a 6 pin relay

An electrical relay consists of a electromagnet and a spring loaded changeover contacts. When the electromagnet is switched ON/OFF with a DC supply, the spring loaded mechanism is corresponding pulled and released by this electromagnet, enabling a changeover across the end terminals of these contacts. An external electrical load connected across these contacts are subsequently […]

Filed Under: Electronics Theory Tagged With: Connect, Pins, Relay, Works

Understanding PID Controller

Last Updated on May 20, 2026 by Swagatam 4 Comments

PID

The first successful assessment of PID control theory was practically verified in the field of automatic steering systems for ships, way back around the year 1920. After this it was applied in various industrial automatic process controls requiring optimized and accurate manufacturing output specifications. For manufacturing units PID was popularly implemented for achieving precise pneumatic […]

Filed Under: Electronics Theory Tagged With: Controller, PID, Understanding

Understanding Pull-Up and Pull-Down Resistors with Diagrams and Formulas

Last Updated on May 20, 2026 by Swagatam 2 Comments

calculation

In this post I am going to explain pull-Up resistor and pull-down resistor, why they are commonly used in electronic circuits, what happens to electronic circuits without Pull-Up or Pull-down resistor, and How to calculate Pull-Up and Pull-down resistor values and finally we will see about open collector configuration. How Logic Inputs and Outputs Work […]

Filed Under: Electronics Theory Tagged With: Diagrams, Down, Formulas, Pull, Resistors, Understanding

Digital Buffer – Working, Definition, Truth Table, Double Inversion, Fan-out

Last Updated on May 20, 2026 by Swagatam 2 Comments

digital buffer

A buffer stage basically a reinforced intermediate stage which allows the input current to reach the output without getting affected by the output loading. In this post I will try to explain what digital buffers are, and we will be taking a look at its definition, symbol, truth table, double inversion using logic “NOT” gate, […]

Filed Under: Electronics Theory Tagged With: Buffer, Definition, Digital, Table, Truth, Working

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