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Simple Transistor Type and Lead Identifier

Simple Transistor Type and Lead Identifier

12332746-+IC1741CBA+Vss+9V-Vss-9VnpnpnpS1SPDTSWITCHSOCKETFOR TUTR410KVREFR312KR21KR122KLED1LED2R51KTUT : TRANSISTOR UNDER TESTV+TUT*Simple Transistor Type and Lead Identifier
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publish time: 2020-10-21
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A bipolar junction transistor (BJT) has three regions, where the emitter and collector are respectively made of the same type of semiconductor (npn is n, pnp is p). If you consider the base and emitter terminals, or the collector terminal, you get a P-N junction diode. But if we hold the collector and emitter terminals, we will encounter two diodes connected back to back.

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