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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