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Electronics Theory

Understanding Bipolar Junction Transistors (BJTs)

Last Updated on May 20, 2026 by Swagatam 4 Comments

If we look at the diodes, their internal construction look very simple. They are made by joining two pieces of semiconductor material, and this is called a pn-junction. But when we talk about bipolar junction transistor or bjt, then things get little more complicated. It needs adding one more layer of semiconductor material, and that […]

Filed Under: Electronics Theory Tagged With: Bipolar, BJTs, Junction, Transistors, Understanding

How MOSFET Works like a Switch

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

Now in our earlier talks we saw that the N-channel Enhancement-mode MOSFET or e-MOSFET works nicely when we supply it with positive input voltage, so this is very important to remember. This type of MOSFET has very high input resistance, almost close to infinity, and because of that we can use it easily like a […]

Filed Under: Electronics Theory Tagged With: like, MOSFET, Switch, Works

How to make a Transistor Latch Circuit

Last Updated on May 20, 2026 by Swagatam 179 Comments

Latch 2

In this post I have explained how to make a simple transistor latch circuit using just two BJTs and a few resistors. Introduction A transistor latch is a circuit which latches ON with a permanent high output in response to a momentary input high signal, and continues to stay in this position as long as […]

Filed Under: Electronics Theory Tagged With: Latch, Transistor

How to Configure Resistors, Capacitors and Transistors in Electronic Circuits

Last Updated on May 20, 2026 by Swagatam 32 Comments

In this post we try to evaluate how to configure or connect electronic components such as resistors, capacitors withing electronic circuits through correct calculation Kindly read my previous post regarding what is voltage and current, in order to grasp the below explained basic electronic facts more effectively. What is a Resistor – It is an […]

Filed Under: Electronics Theory Tagged With: Capacitors, Circuits, Configure, Electronic, Resistors, Transistors

Introduction to Schmitt Trigger

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

Almost any digital circuit used in modern high-speed data communications needs some form of Schmitt trigger action on its inputs. Why Schmitt Trigger is Used The main purpose of a Schmitt trigger here is to eliminate noise and interference on data lines and provide a nice clean digital output with fast edge transitions. The rise […]

Filed Under: Electronics Theory Tagged With: Introduction, Schmitt, Trigger

Understanding SG3525 IC Pinouts

Last Updated on May 20, 2026 by Swagatam 332 Comments

sg3525 ic pin out explained

In this article I have explained the pinout functions of the IC SG3525 which is a regulating pulse width modulator IC. So I have explained in details: Main Technical Features The main features of the IC SG3525 may be understood with the following points: Pinout Diagram of the IC SG3525 PinOut Description A practical implementation […]

Filed Under: Electronics Theory Tagged With: Pinouts, SG3525, Understanding

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