Troubleshooting a Biased Transistor
Several faults can occur in a simple transistor bias circuit. Possible faults are open bias resistors, open or resistive connections,
JFET Working Animation
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Current and Voltage Principle Animation
The animation above shows miniature trucks carrying bags of energy from the battery to a light globe. The light globe
Batteries in Series and Parallel Animation
What happens when we connect the batteries in series and parallel? When we connect the Batteries in Series, we will
How transformer works?
A transformer is based on the fact that when an AC current flows through a wire, it generates a
Optocouplers Working Principle
What is optocoupler? An optocoupler is an optical link and it connects two circuits via this link. The optical link
Phototransistor Circuit Example
Phototransistors are used in a variety of applications. A light-operated relay circuit is shown in below Figure (a). The phototransistor Q1
Phototransistor Working Principle
A phototransistor is similar to a regular BJT except that the base current is produced and controlled by light instead of
How a Transistor Switch Works
The transistor in Figure is used as a switch to turn the LED on and off. For example, a square wave
Transistor as a Switch Working Principle
The below Figure illustrates the basic operation of a BJT as a switching device. In part (a), the transistor is in
