12-11-2009, 02:32 PM
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#1
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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LED Help...
Is there any way to tell the usage of an LED short of testing it, I just pulled out one from a light up pen and was wondering how i could find out 
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12-11-2009, 05:22 PM
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#2
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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nope. connect it to a AA battery. if it lights up, its good. if it doesn't, its not.
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12-11-2009, 06:35 PM
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#3
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GL Member
Join Date: Sep 2006
Location: Canada
Posts: 874
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You could always use the diode test feature of a multimeter, after all, LED means Light Emitting DIODE. Also, if you just have a regular multimeter, just test the resistance of the LED, but test it both ways. If you get high resistance both ways, chances are it is blown. If you get low resistance both ways, chances are it is shorted. If you get high one way, then low the other, chances are it works. Of course Cherri's idea of the battery does sound easier.
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12-11-2009, 06:52 PM
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#4
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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ok, i'm sure i have some batteries lying around 
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12-11-2009, 06:54 PM
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#5
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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make sure to test the battery first. if its dead, obviously it won't work.
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12-11-2009, 06:58 PM
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#6
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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God, I should have known a smart-ass comment would follow 
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12-11-2009, 07:14 PM
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#7
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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Quote:
Originally Posted by Ttop191
God, I should have known a smart-ass comment would follow |
hey... know who your dealing with... |
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12-11-2009, 07:59 PM
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#8
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GL Member
Join Date: Sep 2006
Location: Canada
Posts: 874
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Quote:
Originally Posted by Ttop191
God, I should have known a smart-ass comment would follow |
I was a technician in the Canadian Army, and you'd be surprised how much equipement I got in my shop and the only fault was the batteries where dead. They'd turn it on, try thy the other set of dead batteries in the case, and then figure it didn't work. It is an easy, and VERY common mistake. 2nd only to "leaving the lens cap on"!! 
Last edited by Kilroy : 12-11-2009 at 08:06 PM.
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12-11-2009, 08:03 PM
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#9
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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Quote:
Originally Posted by Kilroy
I was a technician in the Canadian Army, and you'd be surprised how much equipement I got in my shop and the only fault was the batteries where dead. They'd turn it on, try thy the other set of dead batteries in the case, and then figure it didn't work. It is an easy, and VERY common mistake. @nd only to "leaving the lens cap on"!! |
same here at ratshack.
Them: "i just put new batteries in it!"
*tests batteries*
Me: "...you put 8 DEAD batteries in it..." |
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12-11-2009, 09:44 PM
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#10
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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Yea, I've gotten about 6 free MAGLITEs because of idiots who return them with dead batteries 
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