Category: Circuits

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Different Types of Rectifiers and Working

A rectifier is an electronic circuit which converts Alternating Current into Direct Current. Based on the type of input supply, rectification and output it can be classified into different types. Single Phase Rectifier Single...

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3 Phase Rectifier – Half Wave and Full Wave

A 3Φ Rectifier is an electronic circuit that converts three-phase AC supply into unidirectional DC output. 3 phase rectifiers are mainly used in industrial and high power applications. In a three-phase electric power, an alternating...

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Operational Amplifier Viva Interview Questions and Answers

What is an op-amp? An operational amplifier is a direct coupled high-gain electronic amplifier with a differential input to which feedback is given to control its response characteristics at its single-ended output. What is called a differential...

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Rectifier viva interview questions with answers

What is a Rectifier? A rectifier is a device which converts AC (Alternating current) to DC (Direct current). Name the basic types of rectifiers? Half wave rectifier, Full wave center tap rectifier and Full...

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Zener diode voltage regulator circuits

Zener Diode The zener diode is a type of diode which operates under reverse bias that breakdowns when the applied voltage reaches a particular reverse bias voltage or knee voltage. It allows the current...

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Door opening alarm circuit diagram

A door opening alarm circuit is an indicator or a security alert device which activates while opening the device attached door. And the alarm remains ON as long as the door is kept open....

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Simple touch switch circuit using transistor, 4017, 555 IC

A touch switch circuit operates with a touch action of an object or sensible material. It is used in hobby devices to high end consumer electronics for various applications. Touch switch circuit using transistor The...

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Audio Tone generator circuit using 555, 741 IC

A tone generator circuit can be used for various applications such as alarms, bells, indicators, etc. A tone generator consists of a square, triangle, sawtooth periodic wave generator circuits, commonly square wave generators. Such periodic signals...