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This page explains the operation of transistors in simple circuits, mainly their use as switches. Practical matters such as testing, precautions when soldering and identifying leads are covered by the transistors page.
In this tutorial we'll introduce you to the basics of the most common transistor around: the bi-polar junction transistor (BJT). In small, discrete quantities, transistors can be used to create simple electronic switches, digital logic, and signal amplifying circuits.
In this hands-on guide, you’ll learn how transistors work so that you can use them in your next circuit. And it’s actually pretty easy, once you learn the basics. I’ll focus on the two most common transistors here; the BJT and the MOSFET .
Transistors are three terminal active devices made from different semiconductor materials that can act as either an insulator or a conductor by the application of a small signal voltage.
By setting up transistors in very simple circuits, you can easily control things like DC motors, lamps, buzzers, and much more. This is useful for beginners and experienced electronics enthusiasts alike.
We have looked at what transistors are, what they do, and the symbols we use for them in circuits. Now let's look at how a transistor works in more detail. We'll go over some transistor basics, and then show you the operating modes of each type.
A transistor, also known as a BJT (Bipolar Junction Transistor), is a current driven semiconductor device which can be used to control the flow of electric current in which a small amount of current in the Base lead controls a larger current between the Collector and Emitter.