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Testing transistors using a multimeter

Most digital multimeters look like this:

1 = Display, 2 = Function switch, 3 = Transistor socket (optional), 4...6 = Test lead jacks

If your meter has a transistor socket, set the function switch to hFE and simply insert the transistor leads into the proper holes of the socket. To determine the type (NPN/PNP) and to locate the B, C and E leads, use the transistor's datasheet. The display will show the transistor's current gain (hFE).

If your meter doesn't have a hFE test, you can at least test the BE and CB diodes using the diode test.

Later in this course we'll build a nice device for testing transistors (and diodes).

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