Electronics means study of flow of electrons in electrical circuits. The word Electronics comes from electron mechanics which means learning the way how an electron behaves under different conditions of externally applied fields. Fundamentals of electronics are the core subject in all branches of engineering nowadays. It deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes, integrated circuits, associated passive. Electronics has made tremendous advancement during last few decades and our day to day life involves the use of electronic devices. Availability of economical and fast means of communication paves the way for progress of a country. Few decades ago, the main application of electronics was in the field of telephony and telegraphy. Now, with the aid of radio waves we can transmit any message from one place to another, without the use of wires. Radio and TV broadcasting offers a means of both entertainment as well as communication. Today, Electronics gadgets are widely used for entertainment. Defense applications are completely controlled by electronic circuits. RADAR that is Radio Detection and Ranging is the most important development in electronics field. With the help of radar it is possible to detect and find the exact location of enemy aircraft. Radar and anti-craft guns can be linked by an automatic control system to make a complete unit. Electronics circuits are widely being used in industrial applications such as control of thickness, quality, weight and moisture content of a material. Electronic amplifier circuits are used to amplify signals and thus control the operations of automatic door openers, power systems and safety devices. Electronically controlled systems are used for heating and welding in the industry. Electronics systems are being used by Doctors and scientists in the diagnosis and treatment of various diseases. X-rays, ECG, Short eave diathermy units and oscillographs are some instruments which have been used so far in medical science. The use of electronics in medical science has grown so extremely and is useful in saving the life of mankind from a lot of sufferings. Electronics engineering is an electrical engineering discipline which utilizes non-linear and active electrical components to design electronic circuits, devices, microprocessors, microcontrollers and other systems. The discipline typically also designs passive electrical components, usually based on printed circuit boards. This text introduces reader to the basics of electronic engineering.
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Rongie N. Bolanos finished a Bachelor of Science in Electronics and Communication Engineering at the Rizal Technological University and is currently working as drafter.
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