1 Prepare an LED.This one is removed from a mouse.
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2 Find a multimeter which can measure the frequency .
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3 Turn on your flashlight, then you can measure the frequency of your flashliaght.
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The flashlight in picture is Olight i3
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2 Find a multimeter which can measure the frequency .
3 Turn on your flashlight, then you can measure the frequency of your flashliaght.
The flashlight in picture is Olight i3