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Resistors

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  • Member since
    October 2008
  • 8 posts
Resistors
Posted by The Parker Family on Wednesday, March 25, 2009 11:50 AM

Forum Users:

 Does anyone know what value resitor I would need to use between my digitrax decoder with outputs rated at 500mA to a micro LED.

Thanks,

The Parker Family

Tags: Resistors
  • Member since
    December 2004
  • From: Bedford, MA, USA
  • 21,352 posts
Posted by MisterBeasley on Wednesday, March 25, 2009 1:17 PM

I usually use a 1K resistor for LEDs.  You can use a quarter-watt or eighth-watt size.  If the LED is brighter than you want, go up another 200 ohms or so, and if it's too dim, go down the same amount.

It takes an iron man to play with a toy iron horse. 

  • Member since
    December 2002
  • From: US
  • 24 posts
Posted by rbettig on Thursday, March 26, 2009 2:29 PM

Use 1K  1/4 resistor per LED, basic solution, however since DCC uses 14V in HO and depending the LED I go up to 2K for SMD LED.

Richard

 

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