مقدمة - عالمنا الالكتروني .. الإلكترونيات

Introduction - Our Electronic World .. Electronics

Introduction: Our Electronic World

Electronics is the tool of today. It has given us radar, automation, spacecraft, radio telescopes, and many other inventions that have changed the course of our lives.

Electronics means putting the electron in a working state, and the electron is one of the particles in the atom, and it moves at a tremendous speed around the nucleus. It must be mentioned that it carries a negative charge, while the nucleus carries a positive charge.

This book contains an explanation of many electronic devices such as transformers that connect circuits and switch one voltage to another, or perform some specific functions. Resistors and other circuit elements are described in it with a schematic diagram of electronic circuits that shows, just by looking at it, important and necessary information about any part of these equipment and devices. As for the transistor, it is a device made of a semiconductor material, i.e. a thin slice of germanium or silicon. It allows a small current (between the base and the emitter) to control a large current (between the emitter and the collector). It is used in televisions, computers, and many other electronic devices.

In the cathode ray tube, the electron beam is deflected by electric or magnetic fields, and then this beam is directed to the tube screen to fall on it. These valves are used in television receivers, oscilloscopes, and other devices and equipment.

Electronic devices can send us information from satellites and spacecraft. Radio telescopes can also scan the sky to collect information from distances much further than what the naked eye can see.

Radar sends wireless signals over long distances to know the location of objects and targets in space, where the echo of the signals is used to know the distance and direction of these objects relative to the radar site. Sounding is used in ships to know the depth of objects at the bottom of oceans and seas, or in places where sound echo is used to measure depths.

Cells For example, solar cells produce a current when exposed to light to supply space devices with the power needed to operate them. Light-sensitive diodes and transistors also respond to light pulses, which enables them to control electrical circuits using light. There are diodes that produce light under the influence of the electric current passing through them. In fact, the skill of the electronics engineer plays a major role in moving and controlling the electron so that the electrons become a magical tool in his hands.

To this day, electronics engineers still face, while conducting research on modern methods and applications, many exciting challenges that require different explanations and clarifications.