Today,lecture in my class was presented by Mr. Vivek panicker. he explains the lesson titled electronic system. Electronics deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies. The nonlinear behaviour of active components and their ability to control electron flows makes amplification of weak signals possible and electronics is widely used in information processing, telecommunications and signal processing. The ability of electronic devices to act as switches makes digital information processing possible. Interconnection technologies such as circuit boards, electronics packaging technology, and other varied forms of communication infrastructure complete circuit functionality and transform the mixed components into a working system.

Electronics is distinct from electrical and electro-mechanical science and technology, which deals with the generation, distribution, switching, storage and conversion of electrical energy to and from other energy forms using wires, motors, generators, batteries, switches, relays, transformers, resistors and other passive components. This distinction started around 1906 with the invention by Lee De Forest of the triode, which made electrical amplification of weak radio signals and audio signals possible with a non-mechanical device. Until 1950 this field was called "radio technology" because its principal application was the design and theory of radio transmitters, receivers and vacuum tubes.
Today, most electronic devices use semiconductor components to perform electron control. The study of semiconductor devices and related technology is considered a branch of solid state physics, whereas the design and construction of electronic circuits to solve practical problems come under electronics engineering. This article focuses on engineering aspects of electronics.

Overview of Electronics

What is Electronics?:

Electronics is the branch of physics that deals with the emission and effects of electrons and the operation of electronic devices.

 

What is Direct Current?:

Direct current electronics involves working with electrical systems where the flow of electrical current is constant through a conducting medium, generally a wire. Current and voltage in a direct-current circuit are conserved according to Kirchhoff's Current & Voltage Laws.

 

What is Alternating Current?:

Alternating current electronics involves working with electrical systems where the flow of electrical current varies cyclically in magnitude and direction. The form of electricity transmitted to business and residences is alternating current. Audio and radio waves transmitted through wires are in alternating current, as well.

Major Innovations:

For years, electricity was used as part of parlor tricks, creating impressive showers of sparks. Benjamin Franklin is known as perhaps one of the earliest experimenters in electricity, whose invention of the lightning rod was one of the first practical applications. Throughout the 1800's the practical and theoretical concepts of electrical circuitry were developed.

What are Electromagnetic Waves?:

Michael Faraday developed the concept of invisible waves of electromagnetic force, though he lacked the mathematical sophistication to fully quantify these concepts. That was left to James Clerk Maxwell, in the famous Maxwell's equations, which predict the effects of stationary and moving electrons as a set of time-varying wave functions. These waves include electromagnetic radiation.

Preparing for a Career in Electronics:

Most colleges have courses in electronics, as well as electromagnetics, which someone going into electronics will need. A knowledge of mathematics, especially wave functions, is necessary. Depending on the school, you may be considered an Engineering student instead of a physics student, but there will be a fair amount of overlap. This is one of the more practical fields of physics, so you will likely focus more on applications than theory.

Electronics - important topics

• Kirchhoff's Laws - Current Law & Voltage Law

Electronics - important terms

• Voltage
• Current

Electronics - book reviews

• Electric Universe: The Shocking True Story of Electricity
  
  

  Electronic Within thermal imaging industry

  
  The use of Thermal Imaging in Electronic Equipment Applications
  Thermal Imaging has become well established as an invaluable tool for diagnostic
  and preventive maintenance in manufacturing and process industries worldwide;
  the technology enables the appropriate maintenance to be carried out before
  complete breakdown occurs and consequently reduces equipment downtime and
  minimizes the associated impact on profits. Just as with these (normally electrical
  and mechanical) applications, the simple use and low cost of the current generation
  of thermal imagers make them the ideal tool for a host of other applications, and in
  particular for the Electronic Equipment Industry. Infrared thermal imaging cameras
  have been used for many years in this sector and have proved to be invaluable in
  the diagnostic (R&D) and Quality Assurance (production) fields. Thermal imaging is
  often able to pinpoint problems or identify incorrect or unsuitable components when
  classical diagnostic approaches are unable to do so. The cost of the equipment
  however, has meant that the technology has only been available to a limited
  number of specialists. Thermal imaging is now available at an affordable price,
  which means that handheld cameras can now be available to more in the
  engineering field.