Introduction: How to Test UV LEDs

Picture of How to Test UV LEDs
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)

Step 1:

Picture of
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!


schumi23 (author)2012-07-29

Another (simpler) way is to put a yellow highlighter in front of them - it will glow.

m.m.m (author)schumi232015-06-17

Yeah, That worked like a charm. Thanks.

also it has to be a fluorescent highlighter.

About This Instructable




Bio: 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 ... More »
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