Definition of Electronics

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           The branch of physics and technology concerned with the design of circuits using transistors and microchips, and with the behavior and movement of electrons in a semiconductor,conductor, vacuum, or gas.

                                          An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, conductors and diodes, connected by conductive wires or traces through which electric current can flow. An electronic circuit can usually be categorized as an analog circuit, a digital circuit, or a mixed-signal circuit (a combination of analog circuits and digital circuits).Breadboards, perf boards, and strip boards are common for testing new designs. They allow the designer to make quick changes to the circuit during development.