# Tag Basic Electronic Theory

## Basic Electronics – Resistance and Capacitor codes

Resistance colour codes Below is the table containing resistance colour codes. Each color band represents a number and the order of the color band will represent a number value. The first 2 color bands indicate a number. The 3rd color…

## Basic Electronics – Resistor Combinations

RESISTOR COMBINATIONS When we do not get specific resistor values we have to either use variable resistors such as potentiometers or presets to obtain such precise values. Pots are too expensive to use forevery case. Another scheme is to combine…

## LED Basics

Today LED has become an integral part of consumer electronics. LED TV, LED Display, LED Lights and so on. These are becoming very popular because of there low power consumption. What is LED? LED stands for Light emitting diode. A…

## Basic Power Supply Circuits – Part 2

Simplest DC power supply circuit using 78XX is shown below. Parts D1, D2, D3, D4 – 1N4007 IC1 – 7812 IC2 – 7805 C1 – 1000 mf C2 – 330 mf C3 – 10 mf T1 – 12 v Step…

## Basic Power supply circuits Part 1

To understand power supply circuits, we need to understand rectifiers. A rectifier converts AC or alternating current to DC direct current. Rectifiers are used in Power supply circuits which we will discuss in detail. The process of converting AC to…

## Basic Electronics – 2

Passive Components RESISTORS To oppose the flow of electrons ( current). The symbols are shown below. Resistance is measured in units called “Ohm”. 1000 ohms is shown as 1k ohm (103 ohm) and 1000 k ohm is shown as M.ohms…

## Basic Electronics – 1

Introduction Electronic component can be divided into 2 types: Active and Passive components Resistors and Capacitors etc. are known as passive components because they can only attenuate the electrical voltage and signals and cannot amplify. Devices like transistors and operational amplifier(op…