How to Test UV LEDs

About: I'm passionate about combining engineering and sustainability through DIY technology. I'm a mechanical engineering student at Olin College and currently building things at TechShop in San Francisco as an int...
Ultraviolet LEDs produce ultraviolet light which your eye can't see.  This is how I tested to make sure that the  UV LEDs I bought were working correctly.

Here's what you need:
  • Your UV LED
  • A DC Power supply or appropriate battery
  • Transitions glasses (Photochromatic Glass)

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Step 1:

Transitions lenses use a special photochromatic coating that responds to Ultraviolet radiation.  The stronger the UV radiation the darker the lenses become.  I have a pair of photochromatic glasses so I used them to test out my LEDs.
  • Just put your glasses in front of your LEDs.
  • Turn the LEDs on by plugging them in.
  • Wait a minute or 2 with the LEDs on.  It's best not to look at them without eye protection.
  • See if the glasses change color.
That's it!
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    2 Discussions

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    m.m.mschumi23

    Reply 4 years ago on Introduction

    Yeah, That worked like a charm. Thanks.

    also it has to be a fluorescent highlighter.