![]() ![]() By reversing the Probes, test again and observe the reading or deflection. ![]() Observe the reading or the deflection on the multimeter. Place the Red Probe at the first pin of the transistor and the Black Probe at the second (middle) pin. Turn your multimeter to Continuity or Diode Tester Range or Resistor Testing range at 2000Ω (2KΩ) range. Make sure the Black Probe of the multimeter is connected to “COM” port and Red Probe to “VΩmA” port of the multimeter. But however, if you don’t have one, don’t worry! You can use an analog multimeter which also works fine. We are going to use a digital multimeter which is more convinient for this task. This is because I will not explain it in this very article you are reading. Meanwhile, to understanding more about NPN and PNP Transistors, read this article. So, we had made sure that it is removed from the circuit.Īlright! Let me move you straight to the steps how to test NPN and PNP Transistor. The reason is that, the effects of other electronic components in the circuit may affect the acurate result. After reading this article, you can determine if the transistor is an NPN or PNP Bipolar Junction Transistor (BJT).įirst of all, any transistor you wish to test if it is an NPN Bipolar Junction Transistor (BJT) or PNP BJT, I would recommend that it should not be connected in the circuit. In this article, I will teach you how to test NPN and PNP Transistor which is the main reason you are here.
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