How to test diode


Sounds easy right? But guest what? Even so at some point when doing lab work we also forgot how to test the diode whether it is okay or not. Okay, here i would like to give you some tips on how you should test your diode by using multimeter.

To determine the diode polarity

1. Set you multimeter to resistance measurements
2. Connect your diode to the multimeter
3. Now see the indicator whether it is Low resistance or High resistance
4. Low resistance means that the diode is in forward bias, whereas the high resistance indicates that it is in reverse bias.

In theory views, we know that diode only operates in forward bias. So, when the diode is in forward bias, it is like an close circuit, while in reverse bias, the diode is like in an open circuit.

Hey, guest what? you can also determine the diode polarity by making a simple circuit to help you more understanding how the diode operates. Its easy, all you need is a diode, a battery (at least 9V), a switch (optional), and L.E.D.

Here are the example circuit for you to test the diode.

You can also determine whether the diode is in good condition or not.

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