SIMPLE_TRANSISTOR_CHECKER

Published:2009/7/16 20:47:00 Author:Jessie | From:SeekIC

When a T092-type transistor is placed in the correct socket, if the transistor is good, the circuit turns on, according to the kind of transistor being tested. For example, if a good NPN unit is tested, LED1 turns on. Note that two emitter positions are in each socket. Transistors have different pin configurations. Some are BBC, and some are ECB. If you don't know the configuration, you can test all the possible pin positions until an LED turns on. You'll need to know if the transistor is an NPN or a PNP type, however. The supply voltage can be 3 to 9 V. There is no power switch because, without a socketed transistor, capacitor C1 is the only load on the battery. For the sockets, use an eight-pin, mini-DIP socket.



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