Re: [DML] Blowing fuses with LEDs.

["Elvis Nocita" <elvisnocita@xxxxxx>]

Ouch !

Are you serious about the LED ? Blowing a fuse when installing 
them the other direction ?


Hope nobody believed that !
A diode is like a valve. In one direction it can conduct current - and as a
side effect the LED's emmit light.

In the other direction they don't conduct - no current is flowing at all!


Regular LED's might not be able to handle 12V in the other direction, but
when they are designed for cars they should handle it.

Elvis & 6548


> Josh,  
> 
> Blowing fuses with the LEDS in place can occur for either of two reasons. 
> 
> First reason is that the LEDs are polarized.  Remove all and replace one at a time and try it out.  You'll find that when you encounter one that blows the fuse, remove it and rotate it 180 degrees and reinsert.  If you look at superbriteleds.com site, you notice a note that says something about some models being AC/DC and others don't mention it.  You can determine the polarity before hand by powering the LED independently with a 12V source. Put a 100 ohm resistor in line with the LED so that with the wrong polarity,
> the LED will not present a short to the battery.  LEDs are diodes, i.e., they conduct with one polarity of orientation, and radiate light with the other.  For the LEDS which go into the warning light socket, polarity counts. 
> It will either light up or not.  
 ....





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