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1 or 2 limiting resistors needed?

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  • Member since
    December 2007
  • 160 posts
1 or 2 limiting resistors needed?
Posted by Gerome on Thursday, January 29, 2009 7:46 PM

Getting old now.

I've forgotten.  I am connecting two LEDs in close proximity.  Can I put just one limiting resistor on one side to serve both LEDs or does each LED always require its own resistor?

Thanks.

  • Member since
    July 2003
  • From: Sierra Vista, Arizona
  • 13,757 posts
Posted by cacole on Thursday, January 29, 2009 7:50 PM

 Each LED should have its own resistor to protect each other in case one burns out.  With two LEDs connected to one resistor, if one burns out the other will soon follow.  Resistors are cheap, so there's no need to scrimp on them.

  • Member since
    October 2004
  • From: Colorful Colorado
  • 8,639 posts
Posted by Texas Zepher on Thursday, January 29, 2009 8:29 PM

Gerome
I am connecting two LEDs in close proximity.  Can I put just one limiting resistor on one side to serve both LEDs

Yes, but two are better.

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