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Hello everyone, in this lesson we will learn what is a triode

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The full name of the triode is a crystal triode, also called a transistor

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It is a semiconductor device with current amplification

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Although the triode has the function of current amplification,

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in the PC mainboard, the triode is only used as a switch

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And the triode is not used much in the circuit

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For example, the upper right picture, this is a triode used in PC

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The reason why the triode is called a triode is because it has 3 poles

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C-level, B-level and E-level respectively

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Also known as collector, base and emitter

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These 3 poles correspond to the three pins of the triode

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And the polarity of the pins are generally fixed

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For example, in the upper right picture, when the triode is placed as shown in the figure,

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the pin on one side alone is the C pole, also called the collector.

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The lower left corner is the B pole, also called the base

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The lower right corner is the E pole, also called the emitter