March 29, 2011

Resistor and Capacitor Applications

    Resistor and capacitor are the key ingredients of many electronic circuit. Here are some reason why: Power Supply Filter A capacitor will smooth (filter) the pulsating voltage from a power supply into a steady direct current (DC). Spike...
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March 28, 2011

Capasitors

              There are many kinds of capacitors, but they all do the same thing: store electrons. The simplest capacitor is two conductor separated by an insulating material called dielectric....
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Resistors

                    Resistors come in dozens of size and shapes but they all do the same thing: Limit current (or resist). More abou that later. First, let's see how a typical...
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March 27, 2011

Pulses, Waves, Signals and Noise

          Electronics is the study and application of electrons, their behaviour and their effects. The simplest application for electrons are straightforward AC and DC circuit in which a current is used...
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March 26, 2011

How Bipolar Transistor are Used?

              When the base of NPN transistor is grounded (0 volts), no current flows from the emitter to the collector (the transistor is "off"). If the base is forward-biased by at least 0.6...
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Types of Diodes

        Many different kinds of diodes are available. Here are some of the major types: Small Signal Small signal diodes are used to transform low current AC to DC, detect (demodulate) radio signals, multiply voltage,...
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The Transistor

          Transistor are semiconductor devices with three leads. A very small current or voltage at one lead can control a much larger current flowing through the other two leads. This means transistor can...
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March 25, 2011

The Diode

          Both P-type and N-type silicon conduct electricity. The resistance of both type is determined by the proportion of holes or surplus electrons. Therefore both types can function as resistors. And...
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What is Semiconductors?

                     The most exciting and important electronic components are made from crystals called semiconductors. Depending on certain conditions, a...
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