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LED issue

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confounded

New Member
Hi, i have 3 LEDs which i cannot seem to light.
I have used the diode check on my multimeter and 1 way they show a 1.2v drop and the other no condunction, so i dont think they are blown.
I ran them from 20ma upto almost 40ma and yet no light?
They are clear so i dont know what colour they are, is it possible they require more than 40ma to light or could they be blown and still show 1.2v drop and no conduction reverse?
 

crutschow

Well-Known Member
Most Helpful Member
If you look at them with a digital camera you may be able to see them light. Most digital cameras have some response in the near IR.
 
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Sceadwian

Banned
Not some, ALL cmos based digital cameras can see near IR light. Even the best IR filters don't get it all. Just don't got staring into them thinking it's safe cause you can't see it =) If the light is bright enough it will damage your eyes anyways.
 

audioguru

Well-Known Member
Most Helpful Member
The new lenses in my eyes after cataracts surgery allow me to see IR clearly (I can see through thin clothing like a bathing suit). Everybody at the beach look like they are naked!

UV rays don't affect my new lenses.
 

ibrahh2005

New Member
Make the voltag a little more than 2 make it 3 or 3.5
 
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