Beginners Electronics Overview

INTRODUCTION TO ELECTRONICS

Every one of us in our generation today is exposed to electronics device in one way or another. The computer revolution is a good example. Everyone can benefits from additional knowledge of electronics and find this page as an advantage of learning more about electronics.

In this study, we are going to get started with basic electricity, magnetism and basic electronics. This includes the study implementation of ohms law and other basic principle of electricity. In other to grasp this concept and increase your knowledge in electronics, I will urge you to obtain and study various books on electronics. This blog is for everyone from the beginner to expert level of electrical engineering professional.

BASIC ELECTRICITY

BASICS CONCEPT ON ELECTRICITY AND MAGNETISM

Electricity is the presence and motion of charged particles and current flow from charged particles around a closed path. It all starts with the movement of electrical charge from one place to the other. 

 







Everyone is familiar with magnetism. Electric charges do not exist without their associated electric and magnetic fields. You know that magnets like to stick to iron or steel. You might also know that your cassette tape uses magnetism to store the musical information. Most people however don’t realize that magnetism is fundamentally related to electricity. This blog will introduce to many of the basic concept involved with electricity and magnetism.

MATTER – Matter is physically everything that exist that we can touch and feel. Matters consist of atoms. Now we will introduce you to the structure of atoms, talk about electrons and static charge, moving charges, voltage, resistance and current. You will learn about the properties of magnetic and how magnets are used to produce electric current and vice versa. 

Matter can exist as a solid, liquid, or a gas and can change among these three states of matter. In electronics, the most important matter are conductive metals, and non-conductive insulators. In quantum field theory (QFT) you will learn that everything may have a field/wave but here we will stick to thinking in classical physical terms.

More on matter

ELECTRICAL CHARGE - Any object or particles has the ability to become charged. Nobody completely understands what this charge consist of but we understand more about its behavior and reaction. An atom nucleus is positively charged. The smallest known charge of electricity is the charge associated with an electron. These two un-like charges have the ability to attract each other while like charges repel. When electrical charges are at rest, it is called static electricity. If charges are in motion we then have a flow of charge called electrical current.  The force that causes this current is called electromotive force and it measured by a unit called a volt (V). The unit of measurement of the current (I) or movement of the charge is called an ampere. The resistance, or opposition, to current flow is called an ohm (R).

ELECTRICAL FIELDS – Around a charge is an electric field. With every electric field there is a magnetic field. While we can’t see these fields, or yet know exactly what they consist of, we can measure them with instruments and tell a great deal about their behavior. We can then use this knowledge to our benefit. The design of many electrical and electronics devices such as electric motors, radios, televisions, computers, etc depends upon a knowledge of these basic principles of electricity.

WATTS – POWER – A watt is the international system unit of power equal to one joule per second. The symbol used for a watt is “P” for power.  Power is found by multiplying circuits current (I) times its voltage (V).

P = I × V

Moving these electric charges is the heart of basic electronics. Knowing moving charges are and how various electronic components affect the moving charges is the foundation of basic electronics.

BASIC ELECTRONICS

Now that we have a general background in electricity and moving charges we can move on to learning more about basic electronics. Electronics applies electrical current flow of electrical charges to circuits to accomplish specific task. 

Amplifiers can be constructed from glass tubes containing metal elements, or more commonly today with solid diodes, transistors, or integrated circuits. An amplifier is a device that takes a small input signal and gives a larger current as its output.  The small input signal voltage is amplified into larger voltages. A circuit containing resistors, transistors, capacitors inductors, and amplifiers can be configured in many ways to design various electronic circuits like digital logic circuits, television, oscillator, inverters, electronics controlled automatic changeovers, computer circuit, video and much more. An oscillator is an amplifier with some of its output fed to its input. Sound like a perpetual motion machine but isn’t as the amplifier power supply is providing the additional energy that is lost in the circuit and keeps the circulation i.e. oscillation going.

Basic electronics is all about electrical components and the circuits consisting of those components. Such common components are resistors, inductors, transistors, capacitor, and integrated circuits. You will each of these components described in details in our next post. The component interconnected with conductors, either wires or printed circuits. These components make up linear analogue amplifiers, oscillators, and filters as examples. They also can be configured to create logic circuits such as memories, gates, arithmetic units, and central processing units. So you will electronics in every computers, , mp3 player, radio, TV,  and many other appliances in your homes, car, or your body. Each circuit has a job.  Components are interconnected together to carry out a specific task. First learn about each components, how they work then learn how to interconnect them to make useful end products. Continue your study by reading and following our post.