What is Transistor? Testing, Types and uses

What is Transistor? Testing, Types and uses
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Transistor

A transistor is a semiconductor device used to amplify, switching, oscillator, as switch, voltage regulate, and DC to AC electronic signals and electrical power.

It has three terminals Collector (C) Emitter (E) and Base (B). it is denoted by ‘Q’ and comes in number.

Types

  1. NPN
  2. PNP

Symbol and shape

Testing

Find out collector, emitter and base

MM set on beep mode

Common: Base

More value: Emitter

Less Value: Collector

NOTE: NPN TRANSISTOR IS APPOSITE CHECKING OF PNP TRANSISTOR.

Find out NPN and PNP

Which probe put on base, if Black means PNP, if Red means NPN

 

Testing

OK: above testing is ok testing

Faulty: there are three conditions    

Open: nothing show value of all terminals

Short: Beep

Leakage: all terminals show value


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