0:00
With the diode tester, you can test
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LEDs. I have these two blue LEDs here.
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And let's say I didn't know whether or
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not these LEDs were still functional.
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So, I get my LED and I connect my red
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probe to the anode of the LED and I
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connect my black probe to the cathode of
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the LED and it's not lighting up.
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So if I take this other LED
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and connect the red probe to the anode
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of the LED and the black probe to the
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cathode of the LED, we could see that
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the LED is lighting up on this one. So
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that tells me that this first LED that I
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tried to measure is not working. It's
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burnt out. It actually is burnt out.
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And this LED is working just fine.
