What is Electronics ?
Electronics is the study of the flow
of electrons through materials and devices. Devices
could be semiconductors, resistors, inductors,
capacitors and vacuum tubes. An electronic component is
any physical entity in an electronic system which
affects the electrons. Current flows from +ve to -ve.
First of all you must be aware of what
is an atom. Atom contains a nucleus to which electrons
are tightly bound or loosely bound. Example wood, glass
have tightly bound electrons has it is difficult for
current to flow in them since there is less movement of
electrons. Whereas Copper, iron, god, silver are having
loosely bounded electrons to nucleus therefore current
flow is more due to presence of free electrons.
Generators use a magnet to move electrons. In an
electrical circuit, the number of electrons that are
moving is called the
current, and it is measured in
amperes. The
"force" pushing the electrons along is called the
voltage and is
measured in volts. For
example a battery is of 9v means it will push electrons
with force of 9v.In US power outlets gives 120v whereas
in India it gives 220v.
Increase in voltage increases current. Decrease in
resistance will increase current flow.The
advantage that alternating current provides for the
power outlet is the fact that it is relatively easy to
change the voltage of the power, using a device called a
transformer .V=IR
Volts * Amps = Watts ::Volts-Potential
difference
If you allow electrons to move through
a wire, they will create a magnetic field around the
wire.Similarly, if you move a magnet near a wire, the
magnetic field will cause electrons in the wire to move.
Electronics Links
Hobby Projects:
Electronics for hobbyists
Digital
Circuit Builder
Assign an equivalence between a mathematical value and
an electrical charge.
Electronics Zone
"This site contains thousands of electronics circuits
and do-it-yourself circuits for hobbyists,
students,professionals etc. relating to a wide range of
categories like audio,music,home/garden related,computer
hardware,radio,robotics etc to name a few. "
Circuits in the Circuits Archive
Includes Ascii Circuit Diagrams, Radio-related Circuits,
Computer-related Circuits, Audio/Music Circuits,
Telephone Related Circuits. Sponsored by the University
of Washington Electrical Engineering Department.
Electronics circuit designed by Tomi
Engdahl
Includes Audio circuits, Video circuits, Computer
circuits, Data communication circuits, Light effects and
controllers, Measuring equipments, Power supplies,
Telephone circuits
Bowden's Hobby Circuits
A small collection of electronic circuits for the
hobbyist or student. Site includes 73 circuit diagrams,
links to related sites, commercial kits and projects,
newsgroups and educational areas. Sponsored by Bill
Bowden.
Digital Music Zone
This web site features a selection of schematics for
guitar effects, electronic circuits, and recording tips
and techniques for the amateur and professional alike.
Wenzel Associates Technical Library -
Electronics Hobby Page
Collection of electronic circuits and projects for the
hobbyist.
Telephone-related ASCII Schematics V1.01
Electronics Cookbook Archive
Electronics Enthisiasts Share Circuit Ideas With Others.
Electronics For Beginners
Includes: Theory, Practical Skills And Projects,
Components, Test And Measurement, And Digital Circuits.
Sponsored by Graham Knott, Electronics and
Microcomputing teacher at Cambridge Regional College,
Cambridge, England.
The Electronics Workshop
An introduction to electronics Also, tutorials giving
important physics and chemistry concepts related to the
field of electronics. Also, An encyclopedia of
electronics with numerous reference tables.
Test
and Measurement World
Articles, reference, software, and product info.
Planet Analog
News, columns, product reviews. Can subscribe to the
Analog and Mixed Signal eNewsletter!
PCIM Online
Power conversion and intelligent motion.
Electronic Business
Management magazine for the electronics industry
Zen
News
ZEN News is a free E-mail newsletter which provides a
quick summary of news reports and developments in the
Electronics and Information Technology area
Electronics Lab
Links to articles, downloads, projects and an online
community.
Engineering Reference File
The Engineering Reference File will offer a constantly
expanding source of conversion factors,engineering
information, formuli and "rules of thumb." Sponsored by
Prem Magnetics Incorporated
XYZ of Oscilloscopes
A Primer
All About Oscilloscopes
Measurement and Terminology
Optimum Coil Design
This inter-active page covers the design for a coil that
is switched with a transistor (bipolar, MOSFET, IGBT)
and a glossary.
Spectrum Analyzer Tutorial
This site is intended to explain the fundamentals of
spectrum analyzers and discuss the latest advances in
spectrum analyzer capabilities.
Wireless Devices: How It Works
Easy to read descriptions of various RF technologies
including cell phones, radio, TV, pagers and more.
Application Training Guide
Includes Basic Circuit Theory; Basic Semiconductor
Theory; Device Cross Section; Mounting Techniques;
Typical Applications; Glossary of Acronyms. Sponsored by
International Rectifier
Electronic Troubleshooting
An interactive work book.
How Electronics Works
A tutorial guide as to how electronic parts are
developed and used in a variety of everyday components.
Ian Purdie's Amateur Radio Tutorial Pages
"Electronics tutorial radio design pages for amateur,
ham radio, electronic project enthusiasts as well as for
the electronic hobbyist and for home learning to design
your own electronic projects"
The 8052
Online Resource
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