Current and Voltage Principle Animation
August 13, 2016
The animation above shows miniature trucks carrying bags of energy from the battery to a light globe. The light globe...
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Batteries in Series and Parallel Animation
August 13, 2016
What happens when we connect the batteries in series and parallel? When we connect the Batteries in Series, we will...
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How transformer works?
August 13, 2016
A transformer is based on the fact that when an AC current flows through a wire, it generates a magnetic...
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Optocouplers Working Principle
August 13, 2016
What is optocoupler? An optocoupler is an optical link and it connects two circuits via this link. The optical link...
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Phototransistor Circuit Example
August 13, 2016
Phototransistors are used in a variety of applications. A light-operated relay circuit is shown in below Figure (a). The phototransistor Q1...
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Phototransistor Working Principle
August 13, 2016
A phototransistor is similar to a regular BJT except that the base current is produced and controlled by light instead of...
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Transistor as a Switch Working Principle
August 13, 2016
The below Figure illustrates the basic operation of a BJT as a switching device. In part (a), the transistor is in...
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Basic Transistor Amplifier Circuit Principle
August 13, 2016
A transistor amplifies current because the collector current is equal to the base current multiplied by the current gain, b. The base...
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Transistor Collector Characteristic Curves
August 13, 2016
Using a circuit like that shown in Figure (a), a set of collector characteristic curves can be generated that show how...
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Why Silicon is preferred over Germanium ?
August 13, 2016
As we all know, both Silicon and Germanium are semiconductor devices. But the present trend is to use Silicon instead...
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