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What is Electronics?
Electronics is the branch of science that deals with the study of flow and control of electrons (electricity) and the study of their behavior and effects in vacuums, gases, and semiconductors, and with devices using such electrons. This control of electrons is accomplished by devices that resist, carry, select, steer, switch, store, manipulate, and exploit the electron.
Definition of Electronics: The branch of physics that deals with
the emission and effects of electrons and with the use of electronic
devices.
Electronics refers to the flow
of charge (moving electrons) through non-metal conductors (mainly
semiconductors), whereas electrical refers to the flow of charge
through metal conductors
Definition of Electrical:
relating to or concerned with
electricity; "an electrical engineer"; "electrical and mechanical
engineering industries"
Difference in “Electronics” and “Electrical”:
Electronics
deals with flow of charge (electron) through non-metal conductors
(semi-conductors).
Electrical deals with the flow of charge through
metal conductors.
Example: Flow of
charge through silicon which is not a metal would come under
electronics whereas flow of charge through copper which is a metal
would come under electrical.
Basic Rules of Electrical Circuit
*
The current entering any passive circuit equals the current
leaving it, regardless of the component configuration.
* Electricity can kill you!
Inside Electronicsandyou.com:
Basics of Electronics:
In this section of this electronics website,
we learn the basics of electronics including electronics
circuits, PCB (Printed Circuit Board), Electronics Design, Laws
of Electronics. |
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Electronics Definitions:
Electronics
is
the branch of
science that deals with the study of flow and control of
electrons (electricity) and the study of their behavior and
effects in vacuums, gases, and semiconductors, and with devices
using such electrons. |
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Rules of
Electrical Circuits:
* A voltage of 1V across a resistance of 1 Ohm will
cause a current flow of 1 Amp, and the resistor will dissipate 1 Watt (all
as heat). |
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Wiring Symbols:
There are many different representations for basic
wiring symbols, and these are the most common. The conventions
I use for wires crossing and joining are marked with a star (*) -
the others are a small sample of those in common use, but are fairly
representative. Many can be worked out from their position in
the circuit diagram (schematic). |
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What
is an electronic circuit?
A circuit is a structure that directs
and controls electric currents, presumably to perform some useful
function. The very name "circuit" implies that the structure is
closed, something like a loop. |
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Voltage:
Voltage is something is a type of "pressure" that drives electrical
charges through a circuit. Bodies with opposite charges attract, they exert a force on each other pulling them together. The magnitude of the force is proportional to the product of the charge on each mass. |
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Current:
Charge is mobile and can flow freely in certain
materials, called conductors. Metals and a few other elements and
compounds are conductors. Materials that charge cannot flow through
are called insulators. Air, glass, most plastics, and rubber are
insulators, for example. And then there are some materials called
semiconductors, that seemed to be good conductors sometimes but much
less so other times. Silicon and germanium are two such materials.
The flow of charge is called electrical current. Current is measured
in amperes (a), amps for short (named after another French scientist
who worked mostly with magnetic effects).
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What is charge?
Charge
may be defined as the quantity of unbalanced electricity in a body
(either positive or negative) and construed as an excess or
deficiency of electrons.
Charge comes in two forms,
positive (+) , and negative charge ( - ) .
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Batteries:
Charges can be separated by several means to produce
a voltage. A battery uses a chemical reaction to produce energy and
separate opposite sign charges onto its two terminals. As the charge is
drawn off by an external circuit, doing work and finally returning to
the opposite terminal, more chemicals in the battery react to restore
the charge difference and the voltage. The particular type of chemical
reaction used determines the voltage of the battery, but for most
commercial batteries the voltage is about 1.5 V per chemical section or
cell. |
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Resistors:
A Resistor is
an electrical device that resists the flow of
electrical current. It is a passive device used to
control, or impede the flow of, electric current in an
electric circuit by providing resistance, thereby developing
a drop in voltage across the device.
The value of a resistor is measured in ohms
and represented by the Greek letter capital omega. Resistors usually
have a brown cylindrical body with a wire lead on each end, and
colored bands that indicate the value of the resistor.
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Ohm’s Law:
Ohm's law describes the relationship between
voltage, V , which is trying to force charge to flow, resistance, R
, which is resisting that flow, and the actual resulting current I . |
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Power:
Power is
the Electric energy produced per unit time. |
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Capacitors:
In simple words, we can say that a capacitor is a device
used to store and release electricity, usually as the result
of a chemical action. Also referred to as a storage cell, a
secondary cell, a condenser or an accumulator. A Leyden Jar
was an early example of a capacitor. |
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Inductors:
An inductor is
an electrical device (typically a
conducting coil) that introduces inductance into a circuit.
An inductor is a passive electrical component designed to
provide inductance in a circuit. It is basically a coil of
wire wrapped around an iron core. simplest form an inductor
is made up of a coil of wire. The inductance measured in
henrys, is proportional to the number of turns of wire, the
wire loop diameter and the material or core the wire is
wound around. |
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Semiconductor devices:
A conductor made with semiconducting
material. Semiconductors are made up of a substance with electrical
properties intermediate between a good conductor and a good
insulator. A semiconductor device conducts electricity poorly at
room temperature, but has increasing conductivity at higher
temperatures. Metalloids are usually good semiconductors. |
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Silicon:
Silicon, atomic number 14 on the periodic table, is a semiconducting
material from which integrated circuits (computer chips of all
types--processors, memory chips, etc.; CCDs; transistors; etc.) are
created. Silicon is one of the most common elements. Silicon is also the semiconductor material out of which almost all modern transistors are made. |
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Diodes:
A Diode is
an electronic device that allows
current to flow in one direction only. It is a semiconductor that consists of a p-n junction. They are used
most commonly to convert AC to DC, because they pass the
positive part of the wave, and block the negative part of
the AC signal, or, if they are reversed, they pass only the
negative part and not the positive part. |
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Electronic Component name abbreviations:
Here is a list of Electronic Component name abbreviations
widely used in the electronics industry: AE: aerial, antenna B: battery BR: bridge rectifier |
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Electronic Components and Parts:
Electronic components
are basic electronic element or electronic parts
usually packaged in a discrete form with two or more
connecting leads or metallic pads.
Some of the main Electronic
Components are: resistor, capacitor, transistor, diode,
operational amplifier, resistor array, logic gate etc. |
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History of
Electronics:
It is important to know the History of Electronics
(technology) so students better understand their electronic
gadgets they use everyday on an increasing bases. That is,
cell phones, ATMs, calculators, cars, fax machines,
computers, copiers, radios, TV, etc. To understand the
interesting history of these electronic devices helps
explain why science and technology are important, too.
Without these technologies and electronics, our status in
the world community would be diminished, therefore it is
important to study the history of electronics, science and
technology. In this section we learn about
Electronics History from 1745 – 1996 and some
of the great inventions by some greatest inventions and scientists of all
times: |
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Terms Used in
Electronics: In this section
of :electronics and you", we learn Glossary and Definition of some of
the Most Common Terms and definitions used in Electronics and
Electronics Engineering. Some of the terms used in electronics are:
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Electronic Companies:
(Manufacturers,
Suppliers and Exporters): Here is the biggest list of Electronic
Companies: Manufacturers, Suppliers and Exporters. |
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Surface
Mount Technology (SMT):
In-depth tutorial on SMT by SMT Expert and SMT Solver
including: What is Surface Mount Technology (SMT),
Benefits and uses of SMT, Types of Surface Mounting in
SMT, SMT Acronym, Abbreviation and Dictionary, SMT
Equipment (Pick-and-Place Machine for SMT, Wave
Soldering Equipment & Process, Reflow Soldering
Equipment for SMT, Solder Paste Screen Printer for SMT,
Curing / Baking Oven for SMT, Solvent Cleaning in SMT,
Repair and Inspection Equipment for SMT), SMD: Surface
Mount Electronic Components for SMT and more.
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Soldering: All about soldering
including, hand soldering, thru-hole soldering, SMD soldering, wave
soldering selective soldering, RoHS, Lead-Free (Pb-Free), BGA Soldering and
Rework, Desoldering, Solder Wire, Solder Flux, Solder Bar, Soldering
Technology, How to Solder and more ... |
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Solar Energy: Read
about solar energy including: |
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Energy Saving:
LED Light Bulbs - Energy Saving Led Light Bulbs for Home Lighting
LED lights for
Party Decoration |
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Articles:
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More:
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Electronicsandyou.com explains the basics of electronics, history of electronics, terms used in Electronics, importance of Electronics, analog and digital electronics, electronics PCB assembly , machine and tools, electronics components, electronics / electrical materials and consumables, electronics PCB soldering equipments, wave soldering machines for electronics, SMT and BGA in electronics, dispensing systems for electronics industry, tools for electronics, electronic component forming and cutting machines, selective soldering systems for electronics PCB assembly and rework, electronic components including - Resistors, Capacitors, Thermistors, Inductors, Varistors, Diodes, SMD (Surface Mount Devices), terminals, connectors, disconnectors, heat shrink, soldering materials and consumables including - Solder Wire, Solder Bar, Solder Paste, Solder Balls, Soldering Flux, Insulation and Masking Materials, Laminates, Circuit Works Materials, ESD Control Materials including Anti-Static Solutions, Staticide Static Control and Cleaning Wipes, Surface Resistivity Meters, Ionizers, Wrist Straps, Heal Straps, ESD Bags, ESD Mat, Cable Ties and everything else for Electronics PCB manufacturing assembly and rework or repair.
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