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Bi-colour Transistor Tester

Green: NPN; red: PNP

Bi-colour Transistor Tester
Remarkably, in this transistor tester the TUT (transistor under test) flashes a bicolour LED. This allows you to see immediately whether the transistor is functioning, which terminal is the base, emitter and collector, and whether the trannie an NPN or PNP type.
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