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Electronic Basics

What is an Electrical Wire Mesh?

S Bharadwaj ReddyOctober 30, 2019October 30, 2019

Electrical wire mesh is a convenient, efficient and economical means of improving grounding systems at large industrial facilities of high voltage installations and wherever large area communications grounds are required....

Electrical Static Grounding Techniques

S Bharadwaj ReddyOctober 29, 2019October 29, 2019

Different types of application sketches showing a few of the electrical static grounding techniques and schemes used in industries. Attachments to Ground bus Jumper to Ground bus Drum or pail...

What is Contactor ?

S Bharadwaj ReddyJuly 30, 2017July 4, 2019

To start up and shut down a three-phase AC induction motor, any three-pole switch with a suitable current rating will suffice. Simply closing such a switch to send three-phase power...

Troubleshooting a Power Supply Circuit

S Bharadwaj ReddyJune 4, 2017June 6, 2019

Troubleshooting is the application of logical thinking combined with a thorough knowledge of circuit or system operation to identify and correct a malfunction. A systematic approach to troubleshooting consists of three steps:...

Zener Diode Voltage Regulators

S Bharadwaj ReddyJune 3, 2017December 12, 2018

Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. By passing a small current through the diode from a voltage...

What is Cathode Ray oscilloscope ?

S Bharadwaj ReddyApril 1, 2017June 8, 2018

In studying the various electronic, electrical networks and systems, signals which are functions of time, are often encountered. Such signals may be periodic or non-periodic in nature. The device which...

How to Test a Transistor ?

S Bharadwaj ReddySeptember 24, 2016June 5, 2017

An individual transistor can be tested either in-circuit or out-of-circuit with a transistor tester. For example, let’s say that an amplifier on a particular printed circuit (PCB) board has malfunctioned. Good troubleshooting...

IEC labelling for Resistors Color Code

S Bharadwaj ReddySeptember 1, 2016June 6, 2017

The IEC also defines how manufacturers should mark the values of resistors and capacitors in the standard called IEC 60062. The colours used on fixed leaded resistors are shown below:...

Testing a Transistor with a Digital Multimeter

S Bharadwaj ReddyAugust 14, 2016April 30, 2018

Several faults that can occur in the circuit and the accompanying symptoms are illustrated in Below Figure. Symptoms are shown in terms of measured voltages that are incorrect. If a...

How a Transistor Switch Works

S Bharadwaj ReddyAugust 13, 2016May 10, 2018

The transistor in Figure is used as a switch to turn the LED on and off. For example, a square wave input voltage with a period of 2 s is applied...

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